EP2506964A1 - Catalytic reactor including a cell-like structure and elements optimising the contact thereof with the inner wall of the reactor - Google Patents

Catalytic reactor including a cell-like structure and elements optimising the contact thereof with the inner wall of the reactor

Info

Publication number
EP2506964A1
EP2506964A1 EP10805451A EP10805451A EP2506964A1 EP 2506964 A1 EP2506964 A1 EP 2506964A1 EP 10805451 A EP10805451 A EP 10805451A EP 10805451 A EP10805451 A EP 10805451A EP 2506964 A1 EP2506964 A1 EP 2506964A1
Authority
EP
European Patent Office
Prior art keywords
catalytic
reaction chamber
catalytic reactor
alveolar
architectures
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10805451A
Other languages
German (de)
French (fr)
Inventor
Pascal Del-Gallo
Daniel Gary
Aude Cuni
Mathieu Cornillac
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP2506964A1 publication Critical patent/EP2506964A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/248—Reactors comprising multiple separated flow channels
    • B01J19/2485—Monolithic reactors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J12/00—Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor
    • B01J12/007—Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor in the presence of catalytically active bodies, e.g. porous plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J15/00—Chemical processes in general for reacting gaseous media with non-particulate solids, e.g. sheet material; Apparatus specially adapted therefor
    • B01J15/005—Chemical processes in general for reacting gaseous media with non-particulate solids, e.g. sheet material; Apparatus specially adapted therefor in the presence of catalytically active bodies, e.g. porous plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/248—Reactors comprising multiple separated flow channels
    • B01J19/2495—Net-type reactors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • C01B3/06—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents
    • C01B3/12—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents by reaction of water vapour with carbon monoxide
    • C01B3/16—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents by reaction of water vapour with carbon monoxide using catalysts
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
    • C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
    • C01B3/38—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts
    • C01B3/40—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts characterised by the catalyst
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/02—Processes for making hydrogen or synthesis gas
    • C01B2203/0205—Processes for making hydrogen or synthesis gas containing a reforming step
    • C01B2203/0227—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step
    • C01B2203/0233—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step the reforming step being a steam reforming step
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/02—Processes for making hydrogen or synthesis gas
    • C01B2203/0205—Processes for making hydrogen or synthesis gas containing a reforming step
    • C01B2203/0227—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step
    • C01B2203/0238—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step the reforming step being a carbon dioxide reforming step
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/02—Processes for making hydrogen or synthesis gas
    • C01B2203/0205—Processes for making hydrogen or synthesis gas containing a reforming step
    • C01B2203/0227—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step
    • C01B2203/0244—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step the reforming step being an autothermal reforming step, e.g. secondary reforming processes
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/02—Processes for making hydrogen or synthesis gas
    • C01B2203/025—Processes for making hydrogen or synthesis gas containing a partial oxidation step
    • C01B2203/0261—Processes for making hydrogen or synthesis gas containing a partial oxidation step containing a catalytic partial oxidation step [CPO]
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/10—Catalysts for performing the hydrogen forming reactions
    • C01B2203/1005—Arrangement or shape of catalyst
    • C01B2203/1011—Packed bed of catalytic structures, e.g. particles, packing elements
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/10—Catalysts for performing the hydrogen forming reactions
    • C01B2203/1005—Arrangement or shape of catalyst
    • C01B2203/1029—Catalysts in the form of a foam
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/10—Catalysts for performing the hydrogen forming reactions
    • C01B2203/1041—Composition of the catalyst
    • C01B2203/1047—Group VIII metal catalysts
    • C01B2203/1052—Nickel or cobalt catalysts
    • C01B2203/1058—Nickel catalysts
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/12—Feeding the process for making hydrogen or synthesis gas
    • C01B2203/1205—Composition of the feed
    • C01B2203/1211—Organic compounds or organic mixtures used in the process for making hydrogen or synthesis gas
    • C01B2203/1235—Hydrocarbons
    • C01B2203/1241—Natural gas or methane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Definitions

  • Catalytic reactor comprising a honeycomb structure and elements by optimizing the contact with the internal wall of the reactor
  • the subject of the present invention is a catalytic reactor comprising a catalytic alveolar structure, in particular a catalytic ceramic or metal foam, and elements that optimize contact with the internal wall of the reactor.
  • Ceramic foams or metal alloy foams are known to be used as a catalyst support for chemical reactions, in particular heterogeneous catalysis reactions. These foams are particularly interesting for highly exo- or endothermic reactions (ex: Fischer-Tropsch exothermic reaction, gas-water shift reaction, partial oxidation reaction, reaction of water-gas-shift reaction). methanation ...), and / or for catalytic reactors where one seeks to obtain high space velocities (steam reforming reaction of natural gas, naphtha, LPG ).
  • the method of producing open-porosity macro-porous ceramic foams is the impregnation of a polymeric foam (most often polyurethane or polyester), cut to the desired geometry, by a suspension of ceramic particles in an aqueous solvent or organic.
  • the excess suspension is removed from the polymer foam by repeated application of compression or centrifugation, in order to keep only a thin layer of suspension on the strands of the polymer.
  • After one or more impregnations of the polymeric foam by this method it is dried so as to remove the solvent while maintaining the mechanical integrity of the deposited ceramic powder layer.
  • the foam is then heated at high temperature in two stages.
  • the first step called debinding is to degrade the polymer and other organic substances possibly present in the suspension, by a slow and controlled temperature rise until complete elimination of the organic volatile substances (typically 500-900 ° C.).
  • the second step called sintering consists in consolidating the residual mineral structure by a high temperature heat treatment.
  • the final porosity allowed by this method covers a range of 30% to 95% for a pore size ranging from from 0.2mm to 5mm.
  • the final pore size (or open macroporosity) is derived from the macrostructure of the initial organic template (polymer foam, usually polyurethane). That varies generally from 60 to 5 ppi (ppi: pore per inch, 50 ⁇ to 5 mm).
  • the foam may also be metallic in nature with a chemical formulation that makes it possible to ensure the chemical stability of the architecture under operating conditions (temperature, pressure, gas composition, etc.).
  • the metal honeycomb architecture will consist of surface-oxidized NiFeCrAl-based chemical formulations, this surface oxidation allowing the formation of a layer of micrometric alumina protecting the surface. metal alloy of any corrosion phenomenon.
  • Ceramic and / or metal honeycomb architectures covered with ceramic are good catalyst supports in several respects:
  • Axial means along the axis of the catalytic reactor, and by radial of the inner or outer wall of the catalytic reactor at the center of the catalyst bed,
  • thermomechanical and / or thermochemical stresses supported by the bed
  • a filling control to improve the homogeneity of the filling of a tube to another.
  • a solution of the present invention is a catalytic reactor comprising:
  • At least one catalytic structure consisting of at least one catalytic alveolar architecture of external dimensions less than 10% less than the internal dimensions of the reaction chamber;
  • At least one second structure positioned in the annular space chosen from:
  • a structure comprising at least one metal collar enclosing at least a portion of the cellular architectures and supporting metal fins or
  • the fibrous structure may optionally be covered with an active catalytic phase.
  • internal dimensions of the reaction chamber is generally meant the internal diameter and the length because the reaction chamber is generally a tube but it may be other dimensions if the reaction chamber has a different shape.
  • the catalytic structure comprises several cellular architectures, it will then be constituted by the successive stacking of alveolar architectures.
  • the second structure will preferably have characteristics close to that of the reaction chamber (composition, coefficient of thermal expansion, thermal conductivity, etc.) and flexibility characteristics.
  • fibrous structure is meant a structure of ceramic fiber type based on silicocalcary, silicoaluminous, ... or a fibrous structure of a metallic nature (iron straw for example, ).
  • the constraint concerning the chemical nature (formulation) of the fibrous structure is, with respect to the reaction mixtures, a chemical stability of the constituent material (s) and a chemical inertness. This point is also valid for structures b) and c).
  • the fins (structure b) also have the function of increasing the heat transfer.
  • the transfer between the inner wall of the reactor, the fin and the catalytic structure is carried out mainly by conduction.
  • the powder or the mixture of metallic and / or ceramic powders also serves to improve the heat transfer.
  • the transfer between the inner wall of the reactor, the fin and the catalytic structure is carried out mainly by conduction.
  • the powder or powder mixture has grain sizes of between 1 and 5,000 ⁇ .
  • FIG. 1 represents the peripheral wrapping of the catalytic ceramic or metallic foams stacked successively and surrounded by a fibrous structure.
  • FIG. 2 represents a catalytic ceramic or metallic foam sandwiched in a "collar or finned ring" structure.
  • FIG. 3 represents a catalytic ceramic or metal foam sandwiched in a bed structure of ceramic and / or metallic powder (s)
  • the scale is not representative. Indeed, the annular space is generally smaller than 20 mm, preferably less than 10 mm.
  • the reactor according to the invention may have one or more of the following characteristics:
  • the cellular architectures are either a ceramic foam or a surface-coated metal foam for high temperature applications, that is to say greater than 500 ° C., of a protective layer of a ceramic nature;
  • the second structure is a fibrous structure made of ceramic (alumina, silicate, silicoaluminous fibers, etc.) or metal;
  • the metallic fibrous structure may consist of an alloy comprising nickel and chromium, or any alloy compatible with the conditions of the reaction envisaged, for example alloys of Inconel type;
  • the fibrous ceramic structure comprises at least one element selected from (i) the following oxides: alumina, silico-aluminous (SiO 2 -Al 2 O 3 ), silico-calcareous (CaO-SiO 2 ), s ilico -magnets (MgO-SiO2), or a combination of these elements or (ii) the following non-oxides: carbides, nitrides;
  • the fibrous structure of a metallic nature comprises nickel, preferably an alloy based on NiCrO, NiCrAlO or NiFeCrAlO;
  • the second structure is a structure consisting of at least one collar consisting of an alloy comprising predominantly nickel and chromium and enclosing at least a portion of the cellular architectures, and supporting fins consisting of an alloy comprising predominantly nickel and chromium.
  • the metal collar and the fins are in inconel;
  • the second structure is a structure consisting of a powder or mixture of ceramic and / or metal powders comprising at least 50% of inorganic oxides or non-oxide materials comprising at least one element chosen from (i) the following oxides : alumina, silico-aluminous (S1O2-Al2O3), silico-calcareous (CaO-SiC), silico-magnesium (MgO-SiC), or a combination of these elements or (ii) the following non-oxides carbides, nitrides; and / or metallic materials comprising nickel, preferably an NiCrO, NiCrAlO or NiFeCrAlO-based alloy;
  • the second structure is stable and chemically inert vis-à-vis gaseous atmospheres present in the reaction chamber.
  • the catalytic alveolar architectures are manufactured from a matrix of polymeric material chosen from polyurethane (PU), polyvinyl chloride (PVC), polystyrene (PS), cellulose and latex, but the ideal choice of foam is limited by stringent requirements.
  • the polymeric material must not release toxic compounds, for example PVC is avoided because it can lead to the release of hydrogen chloride.
  • the catalytic alveolar architecture when it is ceramic in nature typically comprises inorganic particles chosen from alumina (Al 2 O 3 ) and / or doped alumina (La (1 to 20% by weight) -Al 2 O 3 , Ce ( 1 to 20 wt.% By weight) -Al 2 O 3 , Zr (1 to 20% by weight) -Al 2 O 3 ), magnesia (MgO), spinel (MgAl 2 O 4), hydrotalcites, CaO, silico-calcic, silicoaluminous, zinc oxide, cordierite, mullite, aluminum titanate, and zircon (ZrSiO 2) or ceramic particles selected from ceria (CeO 2 ) and zirconium (ZrO 2 ) ceria stabilized (Gd 2 0 3 between 3 and 10 mol% cerine) and stabilized zirconium (Y 2
  • D is selected from magnesium (Mg), yttrium (Y), strontium (Sr), lanthanum (La), presidium (Pr), samarium (Sm), gadolinium (Gd), Erbium (Er) or Ytterbium (Yb); where 0 ⁇ x ⁇ 1, 0 ⁇ y ⁇ 0; 5 and ⁇ ensures the electrical neutrality of the oxide.
  • the catalytic reactor according to the invention can be used to produce gaseous products, in particular a synthesis gas
  • the feed gas preferably comprises oxygen and / or carbon dioxide and / or water vapor mixed with methane.
  • these catalytic bed structures can be deployed on all catalytic reactors of the process for producing hydrogen by steam reforming, namely in particular the pre-reforming, reforming and water-gas-shift beds.
  • reaction temperatures employed are high and range from 200 to 1000 ° C, preferably from 400 ° C to 1000 ° C.
  • the pressure of the reagents can be between 10 and 50 bar, preferably between 15 and 35 bar.
  • the present invention also relates to the use, within a catalytic reactor comprising a reaction chamber and a catalytic alveolar structure: - a fibrous structure; and or - A structure comprising at least one metal collar enclosing at least a portion of the honeycomb structure and supporting metal fins to prevent the formation of an annular space between the inner wall of the reaction chamber and the catalytic alveolar structure; and or
  • a fibrous structure and / or a structure comprising at least one metal collar, enclosing at least a portion of the cellular architectures and supporting metal fins and / or a powder or a mixture of powder metallic and / or ceramic, in the annular space between the inner wall of the reaction chamber and the catalytic alveolar structure allows both to improve the radial heat transfer, and to limit the flow along the walls.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Catalysts (AREA)

Abstract

The invention relates to a catalytic reactor including: a reaction chamber; at least one catalytic structure made up of at least one catalytic cell-like architecture having outer dimensions at most 10% smaller than the inner dimensions of the reaction chamber; an annular space between the inner wall of the reaction chamber and the cell-like architectures; and at least one second structure positioned in the annular space, selected from among: a) a fibrous structure, or b) a structure including at least one metal collar clasping at least one portion of the cell-like architectures and supporting metal fins.

Description

Réacteur catalytique comprenant une structure alvéolaire et des éléments en optimisant le contact avec la paroi interne du réacteur  Catalytic reactor comprising a honeycomb structure and elements by optimizing the contact with the internal wall of the reactor
La présente invention a pour objet un réacteur catalytique comprenant une structure alvéolaire catalytique, en particulier une mousse céramique ou métallique catalytique, et des éléments optimisant le contact avec la paroi interne du réacteur. The subject of the present invention is a catalytic reactor comprising a catalytic alveolar structure, in particular a catalytic ceramic or metal foam, and elements that optimize contact with the internal wall of the reactor.
Les mousses en céramique voire en alliage métallique sont connues pour être utilisées comme support de catalyseur pour les réactions chimiques, en particulier les réactions de catalyse hétérogène. Ces mousses sont particulièrement intéressantes pour des réactions fortement exo- ou endo- thermiques (ex : réaction exothermique de Fischer- Tropsch, réaction du gaz à l'eau (réaction de water-gas-shift), réaction d'oxydation partielle, réaction de méthanation...), et/ou pour des réacteurs catalytiques où l'on cherche à obtenir des vitesses spatiales élevées (réaction de vaporeformage du gaz naturel, du naphta, GPL ...).  Ceramic foams or metal alloy foams are known to be used as a catalyst support for chemical reactions, in particular heterogeneous catalysis reactions. These foams are particularly interesting for highly exo- or endothermic reactions (ex: Fischer-Tropsch exothermic reaction, gas-water shift reaction, partial oxidation reaction, reaction of water-gas-shift reaction). methanation ...), and / or for catalytic reactors where one seeks to obtain high space velocities (steam reforming reaction of natural gas, naphtha, LPG ...).
La méthode de réalisation de mousses céramique à macro porosité ouverte la plus rependue consiste en l'imprégnation d'une mousse polymérique (le plus souvent polyuréthane ou polyester), découpée selon la géométrie souhaitée, par une suspension de particules céramiques dans un solvant aqueux ou organique. L'excès de suspension est évacué de la mousse de polymère par l'application répétée d'une compression ou par centrifugation, afin de ne conserver qu'une fine couche de suspension sur les brins du polymère. Après une ou plusieurs imprégnations de la mousse polymérique par ce procédé, celle-ci est séchée de façon à évacuer le solvant tout en conservant l'intégrité mécanique de la couche de poudre céramique déposée. La mousse est ensuite chauffée à haute température en deux étapes. La première étape appelée déliantage consiste à dégrader le polymère et autres organiques éventuellement présents dans la suspension, par une élévation de température lente et contrôlée jusqu'à élimination complète des substances volatiles organiques (typiquement 500-900°C). La seconde étape appelée frittage consiste à consolider la structure minérale résiduelle par un traitement thermique haute température.  The method of producing open-porosity macro-porous ceramic foams is the impregnation of a polymeric foam (most often polyurethane or polyester), cut to the desired geometry, by a suspension of ceramic particles in an aqueous solvent or organic. The excess suspension is removed from the polymer foam by repeated application of compression or centrifugation, in order to keep only a thin layer of suspension on the strands of the polymer. After one or more impregnations of the polymeric foam by this method, it is dried so as to remove the solvent while maintaining the mechanical integrity of the deposited ceramic powder layer. The foam is then heated at high temperature in two stages. The first step called debinding is to degrade the polymer and other organic substances possibly present in the suspension, by a slow and controlled temperature rise until complete elimination of the organic volatile substances (typically 500-900 ° C.). The second step called sintering consists in consolidating the residual mineral structure by a high temperature heat treatment.
Cette méthode de fabrication permet ainsi d'obtenir une mousse inorganique qui est la réplique de la mousse de polymère initiale, au retrait de frittage près. La porosité finale permise par cette méthode couvre une gamme de 30% à 95% pour une taille de pore allant de 0,2mm à 5mm. La taille de pore(s) finale (ou macroporosité ouverte) est issue de la macrostructure du « template » organique initial (mousse de polymère, polyuréthane généralement). Celui varie généralement de 60 à 5 ppi (ppi : pore per inch, de 50 μιη à 5 mm). This method of manufacture thus makes it possible to obtain an inorganic foam which is the replica of the initial polymer foam, at the sintering shrinkage. The final porosity allowed by this method covers a range of 30% to 95% for a pore size ranging from from 0.2mm to 5mm. The final pore size (or open macroporosity) is derived from the macrostructure of the initial organic template (polymer foam, usually polyurethane). That varies generally from 60 to 5 ppi (ppi: pore per inch, 50 μιη to 5 mm).
La mousse peut également être de nature métallique avec une formulation chimique permettant d'assurer une stabilité chimique de l'architecture sous conditions opératoires (température, pression, composition gazeuse, ...). Dans le cadre d'une application pour la réaction de vaporeformage de gaz naturel l'architecture alvéolaire métallique sera constituée de formulations chimiques à base NiFeCrAl oxydée en surface, cette oxydation de surface permettant la formation d'une couche d'alumine micrométrique protégeant l'alliage métallique de tout phénomène de corrosion.  The foam may also be metallic in nature with a chemical formulation that makes it possible to ensure the chemical stability of the architecture under operating conditions (temperature, pressure, gas composition, etc.). In the context of an application for the natural gas vapor reforming reaction, the metal honeycomb architecture will consist of surface-oxidized NiFeCrAl-based chemical formulations, this surface oxidation allowing the formation of a layer of micrometric alumina protecting the surface. metal alloy of any corrosion phenomenon.
Les architectures alvéolaires céramiques et/ou métalliques recouverts de céramique constituent de bons supports de catalyseurs à plusieurs égards :  Ceramic and / or metal honeycomb architectures covered with ceramic are good catalyst supports in several respects:
- un rapport surface/volume maximal (m2/m3), afin d'augmenter la surface géométrique d'échange et donc indirectement l'efficacité catalytique, a maximum area / volume ratio (m 2 / m 3 ), in order to increase the geometric exchange surface and thus indirectly the catalytic efficiency,
- une minimisation des pertes de charge le long du lit (entre l'entrée et la sortie du réacteur catalytique),  a minimization of the pressure losses along the bed (between the inlet and the outlet of the catalytic reactor),
- un transfert de chaleur d'une efficacité axiale et/ou radiale accrue. On entend par axial le long de l'axe du réacteur catalytique, et par radial de la paroi interne ou externe du réacteur catalytique au centre du lit catalytique,  a heat transfer of increased axial and / or radial efficiency. Axial means along the axis of the catalytic reactor, and by radial of the inner or outer wall of the catalytic reactor at the center of the catalyst bed,
- une amélioration des contraintes thermomécaniques et/ou thermochimiques supportées par le lit,  an improvement of the thermomechanical and / or thermochemical stresses supported by the bed,
- une amélioration de la densité du remplissage d'un tube par rapport à un remplissage aléatoire induit par les structures conventionnelles (sphère, pellet, cylindre, barillets...), an improvement in the density of the filling of a tube with respect to a random filling induced by the conventional structures (sphere, pellet, cylinder, barrels, etc.),
- un contrôle du remplissage permettant d'améliorer l'homogénéité du remplissage d'un tube à l'autre. - A filling control to improve the homogeneity of the filling of a tube to another.
Néanmoins, un problème qui se pose est la faible qualité en fonctionnement du contact « physique » entre les architectures alvéolaires et la paroi interne des enceintes réactionnelles. Ceci est a fortiori vrai pour des réacteurs fonctionnant à des températures élevées, où la dilatation du tube métallique sera supérieure à celle de l'architecture alvéolaire de nature notamment céramique. Dans le cas d'architecture de nature alvéolaire métallique la dilatation des deux éléments (lit catalytique, enceinte réactionnelle le contenant) peut être plus facilement harmonisée. Nevertheless, a problem that arises is the poor operating quality of the "physical" contact between the cellular architectures and the internal wall of the reaction chambers. This is a fortiori true for reactors operating at high temperatures, where the expansion of the metal tube will be greater than that of honeycomb architecture of particular nature ceramics. In the case of alveolar architecture metallic dilation of the two elements (catalytic bed, reaction chamber containing it) can be more easily harmonized.
Ce mauvais contact entre les architectures alvéolaires et la paroi interne des enceintes réactionnelles peut poser deux difficultés :  This bad contact between the alveolar architectures and the internal wall of the reaction chambers can pose two difficulties:
- la création d'écoulements préférentiels à la paroi, les réactifs n'étant alors pas en contact avec le catalyseur,  the creation of preferential flows at the wall, the reagents not then in contact with the catalyst,
- un mauvais transfert thermique radial.  - poor radial heat transfer.
Une solution de la présente invention est un réacteur catalytique comprenant :  A solution of the present invention is a catalytic reactor comprising:
- une enceinte réactionnelle ;  a reaction chamber;
- au moins une structure catalytique constituée d'au moins une architecture alvéolaire catalytique de dimensions externes inférieures d'au plus 10% aux dimensions internes de l'enceinte réactionnelle ;  at least one catalytic structure consisting of at least one catalytic alveolar architecture of external dimensions less than 10% less than the internal dimensions of the reaction chamber;
- un espace annulaire entre la paroi interne de l'enceinte réactionnelle et les architectures alvéolaires ;  an annular space between the inner wall of the reaction chamber and the cellular architectures;
- au moins une seconde structure positionnée dans l'espace annulaire, choisie parmi :  at least one second structure positioned in the annular space, chosen from:
a) une structure fibreuse, ou  a) a fibrous structure, or
b) une structure comprenant au moins un collier métallique enserrant au moins une partie des architectures alvéolaires et supportant des ailettes métalliques ou  b) a structure comprising at least one metal collar enclosing at least a portion of the cellular architectures and supporting metal fins or
c) une poudre ou un mélange de poudres métallique et/ou céramique.  c) a powder or a mixture of metallic and / or ceramic powders.
La structure fibreuse peut éventuellement être recouverte d'une phase catalytique active.  The fibrous structure may optionally be covered with an active catalytic phase.
Par dimensions externes de l'architecture alvéolaire, on entend :  By external dimensions of the alveolar architecture, we mean:
- la longueur, la largeur et la hauteur si l'architecture a la forme d'un bloc ; ou  - the length, width and height if the architecture has the shape of a block; or
- le diamètre externe et la hauteur si l'architecture est un cylindre ; ...  - the external diameter and the height if the architecture is a cylinder; ...
Par dimensions internes de l'enceinte réactionnelle, on entend généralement le diamètre interne et la longueur car l'enceinte réactionnelle est généralement un tube mais il peut s'agir d'autres dimensions si l'enceinte réactionnelle a une forme différente.  By internal dimensions of the reaction chamber is generally meant the internal diameter and the length because the reaction chamber is generally a tube but it may be other dimensions if the reaction chamber has a different shape.
Si la structure catalytique comprend plusieurs architectures alvéolaires, celle-ci sera alors constituée par l'empilement successif des architectures alvéolaires.  If the catalytic structure comprises several cellular architectures, it will then be constituted by the successive stacking of alveolar architectures.
La seconde structure aura de préférence des caractéristiques proches de celle de l'enceinte réactionnelle (composition, coefficient d'expansion thermique, conductivité thermique...) et des caractéristiques de flexibilité. Par « structure fibreuse » on entend une structure de type fibres céramiques à base silicocalcaire, silicoalumineux, ... ou une structure fibreuse de nature métallique (paille de fer par exemple, ...). La contrainte concernant la nature chimique (formulation) de la structure fibreuse est, vis-à-vis des mélanges réactionnels, une stabilité chimique du/des matériaux la constituant et une inertie chimique. Ce point est également valable pour les structures b) et c). The second structure will preferably have characteristics close to that of the reaction chamber (composition, coefficient of thermal expansion, thermal conductivity, etc.) and flexibility characteristics. By "fibrous structure" is meant a structure of ceramic fiber type based on silicocalcary, silicoaluminous, ... or a fibrous structure of a metallic nature (iron straw for example, ...). The constraint concerning the chemical nature (formulation) of the fibrous structure is, with respect to the reaction mixtures, a chemical stability of the constituent material (s) and a chemical inertness. This point is also valid for structures b) and c).
Ces trois structures a) ou/et b) ou/et c) présentent l'avantage d'être flexibles et donc de pouvoir s'adapter à d'éventuelles variations de dimension de l'espace annulaire paroi interne du réacteur - structure alvéolaire, dues à des dilatations différentielles de l'enceinte réactionnelle et de ladite structure.  These three structures a) and / or b) and / or c) have the advantage of being flexible and therefore of being able to adapt to any variations in the dimension of the annular space internal wall of the reactor - honeycomb structure, due to differential expansions of the reaction chamber and said structure.
Les ailettes (structure b) ont également pour fonction d'augmenter le transfert thermique. Le transfert entre la paroi interne du réacteur, l'ailette et la structure catalytique s'effectue principalement par conduction.  The fins (structure b) also have the function of increasing the heat transfer. The transfer between the inner wall of the reactor, the fin and the catalytic structure is carried out mainly by conduction.
La poudre ou le mélange de poudres métalliques et/ou céramiques (structure c)) ont également pour fonction d'améliorer le transfert thermique. Le transfert entre la paroi interne du réacteur, l'ailette et la structure catalytique s'effectue principalement par conduction. La poudre ou le mélange de poudre a des tailles de grains compris entre 1 et 5 000 μιη.  The powder or the mixture of metallic and / or ceramic powders (structure c) also serves to improve the heat transfer. The transfer between the inner wall of the reactor, the fin and the catalytic structure is carried out mainly by conduction. The powder or powder mixture has grain sizes of between 1 and 5,000 μιη.
La figure 1 représente l'enveloppement périphérique des mousses céramiques ou métalliques catalytiques empilées successivement et entourées par une structure fibreuse.  FIG. 1 represents the peripheral wrapping of the catalytic ceramic or metallic foams stacked successively and surrounded by a fibrous structure.
La figure 2 représente une mousse céramique ou métallique catalytique enserrée dans une structure de type « collier ou anneau à ailettes ».  FIG. 2 represents a catalytic ceramic or metallic foam sandwiched in a "collar or finned ring" structure.
La figure 3 représente une mousse céramique ou métallique catalytique enserrée dans une structure de type lit(s) de poudre(s) céramique et/ou métallique  FIG. 3 represents a catalytic ceramic or metal foam sandwiched in a bed structure of ceramic and / or metallic powder (s)
Dans ces trois figures, l'échelle n'est pas représentative. En effet, l'espace annulaire est en général de taille inférieure à 20 mm, préférentiellement inférieure à 10 mm.  In these three figures, the scale is not representative. Indeed, the annular space is generally smaller than 20 mm, preferably less than 10 mm.
Selon le cas, le réacteur selon l'invention peut présenter une ou plusieurs des caractéristiques suivantes :  Depending on the case, the reactor according to the invention may have one or more of the following characteristics:
- les architectures alvéolaires sont soit une mousse céramique, soit une mousse métallique recouverte en surface, pour des applications haute température, c'est-à-dire supérieure à 500°C, d'une couche protectrice de nature céramique ; - la seconde structure est une structure fibreuse en céramique (fibres d'alumine, de silicocalcaire, de silicoalumineux, ...) ou en métal ; la structure fibreuse métallique peut être constituée d'un alliage comprenant du nickel et du chrome, ou de tout alliage compatible avec les conditions de la réaction envisagée, par exemple les alliages de type Inconel ;the cellular architectures are either a ceramic foam or a surface-coated metal foam for high temperature applications, that is to say greater than 500 ° C., of a protective layer of a ceramic nature; the second structure is a fibrous structure made of ceramic (alumina, silicate, silicoaluminous fibers, etc.) or metal; the metallic fibrous structure may consist of an alloy comprising nickel and chromium, or any alloy compatible with the conditions of the reaction envisaged, for example alloys of Inconel type;
- la structure fibreuse en céramique comprend au moins un élément choisi parmi (i) les oxydes suivants : l'alumine, les silico-alumineux (S1O2-AI2O3), les silico-calcaires (CaO- S1O2) ,les s ilico -magnés ieux (MgO-Si02), ou une combinaison de ces éléments ou (ii) les non-oxydes suivants : carbures, nitrures ; the fibrous ceramic structure comprises at least one element selected from (i) the following oxides: alumina, silico-aluminous (SiO 2 -Al 2 O 3 ), silico-calcareous (CaO-SiO 2 ), s ilico -magnets (MgO-SiO2), or a combination of these elements or (ii) the following non-oxides: carbides, nitrides;
- la structure fibreuse de nature métallique comprend du Nickel, de préférence un alliage à base de NiCrO, NiCrAlO ou NiFeCrAlO ;  the fibrous structure of a metallic nature comprises nickel, preferably an alloy based on NiCrO, NiCrAlO or NiFeCrAlO;
- la seconde structure est une structure constituée d'au moins un collier constitué d'un alliage comprenant majoritairement du nickel et du chrome et enserrant au moins une partie des architectures alvéolaires, et supportant des ailettes constituées d'un alliage comprenant majoritairement du nickel et du chrome. De préférence, pour l'application au réformage à la vapeur, le collier métallique et les ailettes sont en Inconel ;  the second structure is a structure consisting of at least one collar consisting of an alloy comprising predominantly nickel and chromium and enclosing at least a portion of the cellular architectures, and supporting fins consisting of an alloy comprising predominantly nickel and chromium. Preferably, for the steam reforming application, the metal collar and the fins are in inconel;
- la seconde structure est une structure constituée d'une poudre ou d'un mélange de poudres céramique et/ou métallique comprenant au moins 50% de matériaux inorganiques oxydes ou non-oxyde comprenant au moins un élément choisi parmi (i) les oxydes suivants : l'alumine, les silico-alumineux (S1O2-AI2O3), les silico-calcaires (CaO-SiC ) ,les silico- magnésieux (MgO-SiC ), ou une combinaison de ces éléments ou (ii) les non-oxydes suivants : carbures, nitrures ; et/ou de matériaux métalliques comprenant du nickel, de préférence un alliage à base de NiCrO, NiCrAlO ou NiFeCrAlO ;  the second structure is a structure consisting of a powder or mixture of ceramic and / or metal powders comprising at least 50% of inorganic oxides or non-oxide materials comprising at least one element chosen from (i) the following oxides : alumina, silico-aluminous (S1O2-Al2O3), silico-calcareous (CaO-SiC), silico-magnesium (MgO-SiC), or a combination of these elements or (ii) the following non-oxides carbides, nitrides; and / or metallic materials comprising nickel, preferably an NiCrO, NiCrAlO or NiFeCrAlO-based alloy;
- la seconde structure est stable et inerte chimiquement vis-à-vis des atmosphères gazeuses présentes dans l'enceinte réactionnelle.  - The second structure is stable and chemically inert vis-à-vis gaseous atmospheres present in the reaction chamber.
Les architectures alvéolaires catalytiques sont fabriquées à partir d'une matrice en matériau polymérique choisi parmi le poly(uréthane) (PU), le poly(chlorure de vinyle) (PVC), le polystyrène (PS), la cellulose et le latex, mais le choix idéal de la mousse est limité par de sévères exigences.  The catalytic alveolar architectures are manufactured from a matrix of polymeric material chosen from polyurethane (PU), polyvinyl chloride (PVC), polystyrene (PS), cellulose and latex, but the ideal choice of foam is limited by stringent requirements.
Le matériau polymérique ne doit pas libérer des composés toxiques, par exemple le PVC est évité car il peut entraîner la libération de chlorure d'hydrogène. L'architecture alvéolaire catalytique lorsqu'elle est de nature céramique comprend typiquement des particules inorganiques choisies parmi l'alumine(Al203) et/ou l'alumine dopée (La (1 à 20 % en poids)-Al203, Ce (1 à 20 wt.% en poids)-Al203, Zr (1 à 20 % en poids)-Al203), la magnésie (MgO), le spinelle (MgAl204), les hydrotalcites, CaO, les silicocalcaires, les silicoalumineux, l'oxyde de zinc, la cordiérite, la mullite, le titanate d'aluminium, et le zircon (ZrSiO^ ; ou des particules céramiques choisies parmi la cérine (Ce02), le zirconium (Zr02), la cérine stabilisée (Gd203 entre 3 et 10 mol% en cérine) et le zirconium stabilisé (Y203 entre 3 et 10 mol% en zirconium) et les oxydes mixtes de formule (I):The polymeric material must not release toxic compounds, for example PVC is avoided because it can lead to the release of hydrogen chloride. The catalytic alveolar architecture when it is ceramic in nature typically comprises inorganic particles chosen from alumina (Al 2 O 3 ) and / or doped alumina (La (1 to 20% by weight) -Al 2 O 3 , Ce ( 1 to 20 wt.% By weight) -Al 2 O 3 , Zr (1 to 20% by weight) -Al 2 O 3 ), magnesia (MgO), spinel (MgAl 2 O 4), hydrotalcites, CaO, silico-calcic, silicoaluminous, zinc oxide, cordierite, mullite, aluminum titanate, and zircon (ZrSiO 2) or ceramic particles selected from ceria (CeO 2 ) and zirconium (ZrO 2 ) ceria stabilized (Gd 2 0 3 between 3 and 10 mol% cerine) and stabilized zirconium (Y 2 0 3 between 3 and 10 mol% zirconium) and mixed oxides of formula (I):
où 0 < x < 1 et δ assure la neutralité électrique de l'oxyde,  where 0 <x <1 and δ ensures the electrical neutrality of the oxide,
ou les oxydes mixtes dopés de formule (II): or the doped mixed oxides of formula (II):
Ce(i_x_y) Zrx Dy 02-δ (Π), This ( i_ x _ y) Zr x D y 0 2 -δ (Π),
où D is choisi parmi le Magnésium (Mg), l'Yttrium (Y), le Strontium (Sr), le Lanthanum (La), le Presidium (Pr), le Samarium (Sm), le Gadolinium (Gd), l'Erbium (Er) ou l'Ytterbium (Yb); où 0 < x < 1, 0< y <0;5 et δ assure la neutralité électrique de l'oxyde. wherein D is selected from magnesium (Mg), yttrium (Y), strontium (Sr), lanthanum (La), presidium (Pr), samarium (Sm), gadolinium (Gd), Erbium (Er) or Ytterbium (Yb); where 0 <x <1, 0 <y <0; 5 and δ ensures the electrical neutrality of the oxide.
Le réacteur catalytique selon l'invention peut-être utilisé pour produire des produits gazeux, en particulier un gaz de synthèse  The catalytic reactor according to the invention can be used to produce gaseous products, in particular a synthesis gas
Le gaz d'alimentation comprend de préférence de l'oxygène et/ou du dioxyde de carbone et/ou de la vapeur d'eau mélangé à du méthane. Toutefois ces structures de lits catalytiques peuvent être déployées sur tous les réacteurs catalytiques du procédé de production d'hydrogène par vaporeformage, à savoir notamment les lits de pré reformage, de reformage et de water-gas-shift.  The feed gas preferably comprises oxygen and / or carbon dioxide and / or water vapor mixed with methane. However, these catalytic bed structures can be deployed on all catalytic reactors of the process for producing hydrogen by steam reforming, namely in particular the pre-reforming, reforming and water-gas-shift beds.
Les températures de réaction qui sont employées sont élevées et sont comprises entre 200 et 1000°C, de préférence entre 400°C et 1000°C.  The reaction temperatures employed are high and range from 200 to 1000 ° C, preferably from 400 ° C to 1000 ° C.
La pression des réactifs (CO, H2, CH4, H2O, CO2, ...) peut être comprise entre 10 et 50 bars, préférentiellement entre 15 et 35 bars. The pressure of the reagents (CO, H 2 , CH 4 , H 2 O, CO 2, etc.) can be between 10 and 50 bar, preferably between 15 and 35 bar.
La présente invention a également pour objet l'utilisation, au sein d'un réacteur catalytique comprenant une enceinte réactionnelle et une structure alvéolaire catalytique : - d'une structure fibreuse ; et/ou - d'une structure comprenant au moins un collier métallique enserrant au moins une partie de la structure alvéolaire et supportant des ailettes métalliques pour prévenir la formation d'un espace annulaire entre la paroi interne de l'enceinte réactionnelle et la structure alvéolaire catalytique ; et/ou The present invention also relates to the use, within a catalytic reactor comprising a reaction chamber and a catalytic alveolar structure: - a fibrous structure; and or - A structure comprising at least one metal collar enclosing at least a portion of the honeycomb structure and supporting metal fins to prevent the formation of an annular space between the inner wall of the reaction chamber and the catalytic alveolar structure; and or
- d'une poudre ou un mélange de poudres métallique et/ou céramique,  a powder or a mixture of metallic and / or ceramic powders,
pour prévenir la formation d'un espace annulaire entre la paroi interne de l'enceinte réactionnelle et la structure alvéolaire catalytique. to prevent the formation of an annular space between the inner wall of the reaction chamber and the catalytic alveolar structure.
La mise en place d'une structure fibreuse et/ou d'une structure comprenant au moins un collier métallique, enserrant au moins une partie des architectures alvéolaires et supportant des ailettes métalliques et/ou d'une poudre ou d'un mélange de poudre métallique et/ou céramique, dans l'espace annulaire entre la paroi interne de l'enceinte réactionnelle et la structure alvéolaire catalytique permet à la fois d'améliorer le transfert de chaleur radial, et de limiter les écoulements le long des parois.  The establishment of a fibrous structure and / or a structure comprising at least one metal collar, enclosing at least a portion of the cellular architectures and supporting metal fins and / or a powder or a mixture of powder metallic and / or ceramic, in the annular space between the inner wall of the reaction chamber and the catalytic alveolar structure allows both to improve the radial heat transfer, and to limit the flow along the walls.

Claims

Revendications claims
1. Réacteur catalytique comprenant : A catalytic reactor comprising:
- une enceinte réactionnelle ;  a reaction chamber;
- au moins une structure catalytique constituée d'au moins une architecture alvéolaire catalytique de dimensions externes inférieures d'au plus 10% aux dimensions internes de l'enceinte réactionnelle ;  at least one catalytic structure consisting of at least one catalytic alveolar architecture of external dimensions less than 10% less than the internal dimensions of the reaction chamber;
- un espace annulaire entre la paroi interne de l'enceinte réactionnelle et les architectures alvéolaires ;  an annular space between the inner wall of the reaction chamber and the cellular architectures;
- au moins une seconde structure positionnée dans l'espace annulaire, choisie parmi :  at least one second structure positioned in the annular space, chosen from:
a) une structure fibreuse, ou  a) a fibrous structure, or
b) une structure comprenant au moins un collier métallique enserrant au moins une partie des architectures alvéolaires et supportant des ailettes métalliques.  b) a structure comprising at least one metal collar enclosing at least a portion of the cellular architectures and supporting metal fins.
2. Réacteur catalytique selon la revendication 1 , caractérisé en ce que la structure catalytique est constituée par l'empilement successif d'au moins 2 architectures alvéolaires catalytiques de dimensions externes inférieures d'au plus 10% aux dimensions internes de l'enceinte réactionnelle. 2. catalytic reactor according to claim 1, characterized in that the catalytic structure is constituted by the successive stack of at least 2 catalytic alveolar architectures of external dimensions less than 10% to the internal dimensions of the reaction chamber.
3. Réacteur catalytique selon l'une des revendications 1 ou 2, caractérisé en ce que les architectures alvéolaires sont soit une mousse céramique, soit une mousse métallique recouverte en surface d'une couche protectrice en céramique. 3. catalytic reactor according to one of claims 1 or 2, characterized in that the honeycomb architectures are either a ceramic foam or a metal foam coated on the surface of a protective ceramic layer.
4. Réacteur catalytique selon l'une des revendications 1 ou 3, caractérisé en ce que la seconde structure est une structure fibreuse en céramique ou en métal. 4. Catalytic reactor according to one of claims 1 or 3, characterized in that the second structure is a fibrous structure of ceramic or metal.
5. Réacteur catalytique selon la revendication 4, caractérisé en ce que la structure fibreuse en céramique comprend au moins un élément choisi parmi : 5. Catalytic reactor according to claim 4, characterized in that the ceramic fiber structure comprises at least one element chosen from:
- (i) les oxydes suivants : l'alumine, les silico-alumineux (S1O2-AI2O3), les silico-calcaires (CaO-Si02) ,les silico-magnésieux (MgO-Si02), ou une combinaison de ces éléments, ou(i) the following oxides: alumina, silico-aluminous (SiO 2 -Al 2 O 3 ), silico-limestone (CaO-SiO 2 ), silico-magnesium (MgO-SiO 2), or a combination of these elements, or
- (ii) les non-oxydes suivants : carbures ou nitrures ; - (ii) the following non-oxides: carbides or nitrides;
6. Réacteur catalytique selon la revendication 4, caractérisé en ce que la structure fibreuse de nature métallique comprend du Nickel, de préférence un alliage à base de NiCrO, NiCrAlO ou NiFeCrAlO. 6. Catalytic reactor according to claim 4, characterized in that the fibrous structure of a metallic nature comprises nickel, preferably an alloy based on NiCrO, NiCrAlO or NiFeCrAlO.
7. Réacteur catalytique selon l'une des revendications 1 ou 3, caractérisé en ce que la seconde structure est une structure constituée d'au moins un collier constitué d'un alliage comprenant majoritairement du nickel et du chrome et enserrant au moins une partie des architectures alvéolaires, et supportant des ailettes constituées d'un alliage comprenant majoritairement du nickel et du chrome. 7. catalytic reactor according to one of claims 1 or 3, characterized in that the second structure is a structure consisting of at least one collar consisting of an alloy comprising predominantly nickel and chromium and enclosing at least a portion of alveolar architectures, and supporting fins consisting of an alloy comprising predominantly nickel and chromium.
8. Utilisation du réacteur catalytique tel que défini dans l'une des revendications 1 à 7 pour produire du gaz. 8. Use of the catalytic reactor as defined in one of claims 1 to 7 for producing gas.
9. Utilisation selon la revendication 8, caractérisé en ce que le gaz est du gaz de synthèse. 9. Use according to claim 8, characterized in that the gas is synthesis gas.
10. Utilisation, au sein d'un réacteur catalytique comprenant une enceinte réactionnelle et une structure alvéolaire catalytique : 10. Use, within a catalytic reactor comprising a reaction chamber and a catalytic alveolar structure:
- d'une structure fibreuse ; et/ou  a fibrous structure; and or
- d'une structure comprenant au moins un collier métallique enserrant au moins une partie de la structure alvéolaire et supportant des ailettes métalliques pour prévenir la formation d'un espace annulaire entre la paroi interne de l'enceinte réactionnelle et la structure alvéolaire catalytique ,  a structure comprising at least one metal collar enclosing at least a portion of the honeycomb structure and supporting metal fins to prevent the formation of an annular space between the inner wall of the reaction chamber and the catalytic alveolar structure,
pour prévenir la formation d'un espace annulaire entre la paroi interne de l'enceinte réactionnelle et la structure alvéolaire catalytique. to prevent the formation of an annular space between the inner wall of the reaction chamber and the catalytic alveolar structure.
EP10805451A 2009-12-01 2010-11-24 Catalytic reactor including a cell-like structure and elements optimising the contact thereof with the inner wall of the reactor Withdrawn EP2506964A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0958552A FR2953151B1 (en) 2009-12-01 2009-12-01 CATALYTIC REACTOR COMPRISING A CATALYTIC ALVEOLAR STRUCTURE AND ELEMENTS OPTIMIZING THE CONTACT OF THIS ALVEOLAR STRUCTURE WITH THE INTERNAL WALL OF THE REACTOR
PCT/FR2010/052497 WO2011067503A1 (en) 2009-12-01 2010-11-24 Catalytic reactor including a cell-like structure and elements optimising the contact thereof with the inner wall of the reactor

Publications (1)

Publication Number Publication Date
EP2506964A1 true EP2506964A1 (en) 2012-10-10

Family

ID=42124330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10805451A Withdrawn EP2506964A1 (en) 2009-12-01 2010-11-24 Catalytic reactor including a cell-like structure and elements optimising the contact thereof with the inner wall of the reactor

Country Status (6)

Country Link
US (1) US8747769B2 (en)
EP (1) EP2506964A1 (en)
CN (1) CN102639226A (en)
BR (1) BR112012013146A2 (en)
FR (1) FR2953151B1 (en)
WO (1) WO2011067503A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130136864A1 (en) * 2011-11-28 2013-05-30 United Technologies Corporation Passive termperature control of hpc rotor coating
CN109863228A (en) 2016-10-27 2019-06-07 国际壳牌研究有限公司 Method for producing hydrocarbon

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418045A (en) * 1980-09-19 1983-11-29 Nippon Shokubai Kagaku Kogyo Co., Ltd. Method for disposal of waste gas and apparatus therefor
JPS5884038A (en) * 1981-11-13 1983-05-20 Toyota Motor Corp Monolithic catalyst vessel
DE3816012A1 (en) * 1987-08-14 1989-11-16 Siemens Ag DEVICE FOR RECOMBINATING HYDROGEN AND OXYGEN
EP0884459A3 (en) * 1997-06-13 2002-12-11 Corning Incorporated Coated catalytic converter substrates and mounts
JP2001280124A (en) * 2000-03-31 2001-10-10 Ngk Insulators Ltd Cell structural body storage container and its assembly
US20040120871A1 (en) * 2002-12-19 2004-06-24 Gilbert De Angelis Reactor construction
CA2511173A1 (en) * 2002-12-20 2004-07-15 Honda Giken Kogyo Kabushiki Kaisha Noble metal-free nickel catalyst formulations for hydrogen generation
US8062552B2 (en) * 2005-05-19 2011-11-22 Brookhaven Science Associates, Llc Electrocatalyst for oxygen reduction with reduced platinum oxidation and dissolution rates
US20070013144A1 (en) * 2005-07-13 2007-01-18 Seungdoo Park Reactor sealing methods

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2011067503A1 *

Also Published As

Publication number Publication date
BR112012013146A2 (en) 2017-03-21
US8747769B2 (en) 2014-06-10
FR2953151B1 (en) 2014-06-13
US20120235096A1 (en) 2012-09-20
FR2953151A1 (en) 2011-06-03
CN102639226A (en) 2012-08-15
WO2011067503A1 (en) 2011-06-09

Similar Documents

Publication Publication Date Title
JP5236412B2 (en) New catalyst design and manufacturing process for steam reforming catalysts
US20210245139A1 (en) Catalyst support materials, catalyst supports, catalysts and reaction methods using catalysts
US20110097259A1 (en) Ceramic Foam with Gradient of Porosity in Heterogeneous Catalysis
EP2141140A1 (en) Ceramic foams with gradient of porosity and gradient of catalytic active(s) phase(s)
EP2141139A1 (en) Ceramic foams with gradients of composition in heterogeneous catalytic
EP2506962B1 (en) Catalytic reactor including one cellular area having controlled macroporosity and a controlled microstructure and one area having a standard microstructure
EP0418122B1 (en) Oxidation reactor with differential pressure drop and its application .
EP2506964A1 (en) Catalytic reactor including a cell-like structure and elements optimising the contact thereof with the inner wall of the reactor
WO2011018568A1 (en) Method for producing a ceramic foam having reinforced mechanical strength for use as a substrate for a catalyst bed
Zhang et al. Fabrication and characterization of dense BaCo0. 7Fe0. 2Nb0. 1O3− δ tubular membrane by slip casting techniques
EP2507163A1 (en) Catalytic reactor including a catalytic cellular structure and at least one structural element
JP4430291B2 (en) Syngas production method
JP2023128245A (en) Latent-heat heat-storage material molded body and method for producing the same
FR2936963A1 (en) OPEN TRI-DIMENSIONAL STRUCTURE HAVING HIGH MECHANICAL RESISTANCE
EP2397223A1 (en) Catalytic reactor comprising a catalytic structure providing an improved gas flow distribution
KR102372525B1 (en) Supported nickel catalysts used as direct internal reforming catalyst in molten carbonate fuel cells
FR2651689A1 (en) Oxidation reactor with head loss differential and its use
WO2015181492A1 (en) Catalyst in the form of a monolith with a channel network

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20120702

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20180720

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20190304