EP2300362A1 - Externally heated membrane reforming - Google Patents
Externally heated membrane reformingInfo
- Publication number
- EP2300362A1 EP2300362A1 EP08789984A EP08789984A EP2300362A1 EP 2300362 A1 EP2300362 A1 EP 2300362A1 EP 08789984 A EP08789984 A EP 08789984A EP 08789984 A EP08789984 A EP 08789984A EP 2300362 A1 EP2300362 A1 EP 2300362A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reforming
- membrane
- hydrogen
- separation
- heat
- 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- Withdrawn
Links
Classifications
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- 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
- C01B3/382—Multi-step processes
-
- 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
- C01B3/348—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 by direct contact with heat accumulating liquids, e.g. molten metals, molten salts
-
- 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
- C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
- C01B3/501—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by diffusion
-
- 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
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/0405—Purification by membrane separation
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- 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
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/042—Purification by adsorption on solids
- C01B2203/043—Regenerative adsorption process in two or more beds, one for adsorption, the other for regeneration
-
- 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
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/0465—Composition of the impurity
- C01B2203/0475—Composition of the impurity the impurity being carbon dioxide
-
- 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
- C01B2203/08—Methods of heating or cooling
- C01B2203/0805—Methods of heating the process for making hydrogen or synthesis gas
- C01B2203/0833—Heating by indirect heat exchange with hot fluids, other than combustion gases, product gases or non-combustive exothermic reaction product gases
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- 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
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- 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
- C01B2203/1064—Platinum group metal catalysts
- C01B2203/107—Platinum 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
- C01B2203/1258—Pre-treatment of the feed
- C01B2203/1264—Catalytic pre-treatment of the feed
- C01B2203/127—Catalytic desulfurisation
-
- 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
- C01B2203/14—Details of the flowsheet
- C01B2203/142—At least two reforming, decomposition or partial oxidation steps in series
- C01B2203/143—Three or more reforming, decomposition or partial oxidation steps in series
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- 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
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
-
- 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
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
Definitions
- the present invention is related generally to the hydrogen production from hydrocarbons and more specifically to hydrogen production via membrane reforming wherein a large part of the reaction heat is supplied not throughout the combustion of any hydrocarbons or off-gas, only a little amount of hydrocarbons (purge gas and make up fuel) being burned in the post combustion chambers.
- Hydrogen is largely used today in refinery application to convert sulfur into H 2 S, to reduce aromatics content and to crack heavier compounds into lighter ones. Hydrogen may play also an important role in future as energy carrier. The efficiency in transforming the feed into H 2 and consequently production costs is the main driver for process selection. Environmental impact is going to play more and more in such a transformation process. It is known that membrane reforming may play an important role in converting natural gas or heavy hydrocarbons into hydrogen in a very efficient way.
- US Patent 6348278, US Patent 6802876, US Publication 2004/0049982, for instance, disclose various hydrogen production systems provided with a membrane reformer or a reformer including a reformer body and a hydrogen separation unit using a hydrogen separation membrane. It is an object of the present invention to further increase the overall energy efficiency of a system for producing hydrogen via membrane reforming and pave the way to produce large amount of hydrogen with the minimum environmental impact.
- a system for producing hydrogen which integrates membrane reforming of hydrocarbons with an external source of heat as a separated nuclear reactor or solar heated molten salts.
- the integration is done by an intermediate stream, air for instance, which is heated at least up to 550-600 0 C in a heat exchange, by cooling down a hot medium stream as molten salts or hot helium coming from a nuclear reactor or heated by the sun.
- Figure 1 is a schematic view of the proposed system
- Figure 2 is a schematic process flow diagram
- Figure 3 is a schematic view of membrane reforming step
- Figure 4a is a schematic view of the membrane module separation
- Figure 4b is a cross section of the figure 4a;
- Figure 5 is the effect of the recirculation stream versus the natural gas conversion;
- Figure ⁇ is the schematic view of the two reforming steps;
- Figure 7a is the schematic cross-section of a suitable configuration for membranes.
- Figure 7b is a SEM image with a detail of the membrane. Detailed description and best mode of the disclosure
- FIG. 1 Our system is schematically illustrated in figure 1 and generally indicated at 100.
- System 100 includes a heat exchanger, 110, that recovery the heat from the external sources to preheat air, 10, up to 550-600 0 C at least.
- the preheated air stream is delivered to the post-combustion chamber, 120, where it is further pre-heated to 700-750 0 C, by burning the off-gas, 11, from PSA unit, 190, and part of the retentate, 12, from the third separator module, 136.
- the stream 10 is used to provide all the reaction heat, pre-heat the process streams, produce medium pressure steam, 13, to be used for the process and low pressure stream, 14, to be used as sweeping gas in the separation module.
- stream 10 is discharged to the stack, 180.
- Device 130 the membrane reformer see also figure 3, consists of at least two steps, more typically three, each step has its own reforming reactor, 131, 132 and 133 and its own separation module, 134 135 and 136.
- Natural gas or other hydrocarbons feedstock, 20, is desulfurized in the device 170. Following is mixed with process steam, 13, recirculation flow, 25, and heated up in the device 140 before entering reactor 131.
- Syngas at the outlet, 15, is cooled down in 202 and routed to the 134 separation module, where a first ritentate, 16, and an almost pure hydrogen stream, 21, are obtained.
- Stream 16 after a pre-heating, in 203 enters into the second reforming step, 132, where part of remaining natural gas is reformed to syngas, 17.
- a second combustion chamber 137 provides a temperature rise of the stream 10 in order to supply the heat of the reaction at 700-750 0 C.
- Stream 17 is routed to the second separation module, 135, where the syngas is divided in a second retentate stream, 18, and another hydrogen stream 22.
- Device 150 consists of a condensate separator (151) and an adsorption column 152 where the CO 2 is captured and stored. The outlet stream is then heated up 450 0 C in 209 and sent to the third separation module 136.
- the retentate stream 24 from unit 136 is partially send to device 120, the remaining flow, 25, is recycled back to device 131 through a reciculator. Effect of recirculation flow versus the feed conversion is shown in figure 5.
- One of separation modules is represented in figures 4a, 4b, where syngas 15 is flowing on the shell side and sweeping steam, 14, flows on the tube side from one side.
- the low pressure streams which contain hydrogen, water vapor and hundreds of ppm of CO+CO 2 +CH 4 , after the steam condensation and water removal, are compressed and fed to the PSA unit, 190, where hydrogen is finally purified and off-gas, 11, is produced.
- Device 130 is typically operated at elevated temperature and pressure.
- devices 132, 133 and 134 may be operated at temperature in the range of 500-650°C, much less than a conventional reformer. Pressure may range from 5 to 25 barg.
- Devices 134, 135 and 136 may be operated at temperature much lower than the relative reforming step, in the range 420-470 0 C.
- the permeates pressure are ranging from 0.5 to 2 barg.
- the figure 2 depicts a simplified process scheme where all the streams have been indicated.
- a suitable structure for reforming steps, 131, 132 and 133 is made by a bundle of tubes, externally finned, and filled with a proper catalyst active at such low reforming temperature.
- Tubes diameter may ranges form 3 to 5" and heated length from 5 to 10 meter. Due to the lower tubes metal temperature, compared to the conventional reforming technology, such tubes are made of common stainless steel and not in the exotic material as the cast 25-35 micro alloy material.
- a suitable structure for the separation module, 134, 135 and 136 includes a bundle of tubular membranes 40 assembled in a shell 42 like tube configuration as in fig.4. Tubular membranes diameter may range from 20 to 100 mm, and length from one to five meters . Alternatively such separation module can be build with planar membrane configuration, having up to 1 meter dimension.
- the membranes may be made of any material hydrogen-permeable suitable to be used at the operating environments in which devices 134, 135 and 136 operate.
- suitable materials for membranes include palladium and palladium alloys, particularly thin films of such metals and metal alloys. Palladium alloys have proven particularly effective, especially palladium with at least 23% of silver (see fig.7b) .
- These membranes are typically formed from a thin foil 44 that is approximately 1 to 10 micron thick. Examples of suitable mechanism for reducing the thickness of the membranes include sputtering and etching.
- the membrane is supported by an under-laying support 46 made of porous ceramic and metallic material. Typically porous stainless steel is considered to be a good candidate for such application.
- a ceramic layer 48 is inserted between the previous two. Titanium or zirconium oxides with a proper grain size have been used for such application.
- FIGS 7a and 7b illustrative example of a suitable configuration for membranes is shown. It should be understood that the membrane configurations discussed above have been illustrated schematically as per figure 7, are not intended to represent every possible configuration within the scope of invention. For example, although membrane illustrated in figures 4a, 4b as having a tubular configuration, it is within the scope of the invention that such a membrane may have a planar configuration as well.
- the fact that membranes are not inserted into the reforming reactor, integrally formed, allows optimizing the design of the reactor independently from the one of the separator module. Conversely in the integrated design, the limiting flux of the membranes is going to limit the heat flux of the reforming tubes with the result to install more surface of the minimum required.
- device 110 is a heat exchanger where air is heated by cooling down a hot medium stream. Such a stream may be melted salts or hot helium stream coming from a nuclear reactor or heated by the sun throughout peculiar devices. It is within the scope of the invention the use of any intermediate hot fluid suitable to heat up air in the range of 550-700°C which in turn will be used to provide the heat of reforming reactions .
- device 120 and 137 are two post-combustion chambers where air from device 110 is heated to the required level for reforming in two or more steps in order to optimize the level of heat exchange for each reforming step. This may imply more than two post-combustion sections or also only one.
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT2008/000395 WO2009150678A1 (en) | 2008-06-12 | 2008-06-12 | Externally heated membrane reforming |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2300362A1 true EP2300362A1 (en) | 2011-03-30 |
Family
ID=40352346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08789984A Withdrawn EP2300362A1 (en) | 2008-06-12 | 2008-06-12 | Externally heated membrane reforming |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2300362A1 (en) |
WO (1) | WO2009150678A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109306880A (en) * | 2018-11-15 | 2019-02-05 | 大连理工大学 | A kind of CO based on the recycling of power plant's internal energy2Compress and liquefy adjustable composite system |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2474503A1 (en) * | 2011-01-10 | 2012-07-11 | Stamicarbon B.V. acting under the name of MT Innovation Center | Method for hydrogen production |
NL2006245C2 (en) | 2011-02-18 | 2012-08-21 | Stichting Energie | MEMBRANE REACTOR AND PROCESS FOR THE PRODUCTION OF A GASEOUS PRODUCT WITH SUCH REACTOR. |
EP2734470A2 (en) * | 2011-07-21 | 2014-05-28 | Rockfuel Innovations Limited | Carbon dioxide production |
US9493350B2 (en) | 2012-03-16 | 2016-11-15 | Stamicarbon B.V. Acting Under The Name Of Mt Innovation Center | Method and system for the production of hydrogen |
DK201500463A1 (en) * | 2015-08-12 | 2016-08-29 | Haldor Topsoe As | Chemical recuperation of hydrocarbonic fuel using concentrated solar power |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2656726A1 (en) * | 1976-12-15 | 1978-06-22 | Otto & Co Gmbh Dr C | TUBE REACTOR FOR CARRYING OUT ENDOTHERMAL GAS REACTIONS |
DE2724833A1 (en) * | 1977-06-02 | 1979-03-01 | Ght Hochtemperaturreak Tech | COAL GASIFICATION WITH NUCLEAR ENERGY |
DE2809126C2 (en) * | 1978-03-03 | 1986-07-17 | GHT Gesellschaft für Hochtemperaturreaktor-Technik mbH, 5060 Bergisch Gladbach | Cracking furnace |
DE3933284A1 (en) * | 1989-10-05 | 1991-04-18 | Steinmueller Gmbh L & C | Electrical energy from solar energy - via methane deforming process and fuel cell |
DE3933285A1 (en) * | 1989-10-05 | 1991-04-18 | Steinmueller Gmbh L & C | Continuous prodn. of synthesis gas - by reforming methane using carbon di:oxide as fuel gas |
-
2008
- 2008-06-12 WO PCT/IT2008/000395 patent/WO2009150678A1/en active Application Filing
- 2008-06-12 EP EP08789984A patent/EP2300362A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
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See references of WO2009150678A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109306880A (en) * | 2018-11-15 | 2019-02-05 | 大连理工大学 | A kind of CO based on the recycling of power plant's internal energy2Compress and liquefy adjustable composite system |
Also Published As
Publication number | Publication date |
---|---|
WO2009150678A1 (en) | 2009-12-17 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: TECNIMONT KT - KINETICS TECHNOLOGY S.P.A. |
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