WO2011110322A1 - Verfahren zur adsorptiven trocknung von gereinigtem biogas und regenerierung beladener adsorptionsmittel - Google Patents
Verfahren zur adsorptiven trocknung von gereinigtem biogas und regenerierung beladener adsorptionsmittel Download PDFInfo
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- WO2011110322A1 WO2011110322A1 PCT/EP2011/001116 EP2011001116W WO2011110322A1 WO 2011110322 A1 WO2011110322 A1 WO 2011110322A1 EP 2011001116 W EP2011001116 W EP 2011001116W WO 2011110322 A1 WO2011110322 A1 WO 2011110322A1
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- biogas
- biomethane
- regeneration
- dried
- drying
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- B01D53/261—Drying gases or vapours by adsorption
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- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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- B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
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- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/18—Gas cleaning, e.g. scrubbers; Separation of different gases
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- E01C11/00—Details of pavings
- E01C11/005—Methods or materials for repairing pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/096—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for forming, opening-out, cleaning, drying or heating and filling
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- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C5/00—Pavings made of prefabricated single units
- E01C5/003—Pavings made of prefabricated single units characterised by material or composition used for beds or joints; characterised by the way of laying
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- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/24—Hydrocarbons
- B01D2256/245—Methane
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- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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Definitions
- the invention relates to a process for the adsorptive drying of purified biogas (so-called biomethane) and regeneration of loaded adsorbents, wherein the dried biogas is subject to further use, e.g. by feeding into a conventional natural gas network, is supplied.
- biomethane purified biogas
- Biogas can be purified by various methods, with the aim of obtaining a gas with a relatively high proportion of methane, in the range of 90 to 99% by volume.
- biomethane may still contain carbon dioxide (0.1 to 4% by volume), hydrogen (0.01 to 0.2% by volume), nitrogen and oxygen (0.2 to 4% by volume) as residual constituents. and water (1 to 3% by volume).
- Other components such as H 2 S, NH 3 , are possibly still in the range of 1 to 5 ppm.
- purified biogas still contains fractions of aromatic or other hydrocarbons, in quantities of up to 1,000 ppm, whose ignition points are significantly lower than those of methane.
- biomethane for example for feeding into a natural gas network, it is necessary to remove the water contained in the gas to a limit of less than 40 mg / Nm 3 .
- Absorptive processes (EP 0 907 400 B1) work with a solvent such as triethylene glycol, triethylene glycol being dissolved by gas washing in the gas, which can then be regenerated again at a temperature of 200.degree.
- the invention has for its object to provide a method for adsorptive drying of purified biogas with a methane content of at least 90 vol .-% and regeneration beiadener adsorbent, in which no foreign substances can get into the purified biogas contained in the gas to be cleaned share remains almost unchanged in methane, and the cost of regenerating the loaded adsorbent is reduced.
- the layer of silica gel consists of two layers, a lower macroporous and an upper mesoporous layer.
- the volume ratio of the first layer "Silcagel” to the second layer of "molecular sieves” is 20: 1 to 3: 1, preferably 12: 1 to 8: 1. This depends on the water content of the biogas to be dried (biomethane). The higher the water content in the biogas to be dried, the greater this ratio.
- the layer of silica gel can also be formed from at least two layers of different silica gels, the space between these two layers being heated via an external heat source. This can be done via an installed intermediate heater.
- the biogas to be dried is preferably pumped through the adsorber without pressure. If necessary, a pressure of up to 1 bar can also be used.
- the water content should already be reduced to 5 g / Nm 3 . This can be done for example by cooling. Without prior drying a correspondingly larger dimensions of the adsorber is required.
- the adsorption time is 12 to 14 hours. Within this time, the water content in the dried biomethane can be reduced to well below 20 mg / Nm 3 .
- the adsorbent For the subsequent regeneration of the adsorbent only heated dried biomethane is used, which is returned after contact with adsorbent back into the output stream of purified biogas.
- the warming takes place preferably at a temperature of about 110 to 150 ° C in a separate heat exchanger by means of a heat carrier, such as thermal oil or hot water or steam.
- a heat carrier such as thermal oil or hot water or steam.
- the temperature of the heat carrier should not exceed 200 ° C.
- the temperature of the exiting biomethane is continuously measured. This is during the regeneration in a range of 20 to 30 ° C. If the outlet temperature rises to 40 to 50 ° C, the supply of biomethane is switched off and the regeneration process is terminated.
- the adsorber is heated at the beginning of the regeneration at least in the lower region. This can be done via a double jacket or a heating coil, which are flowed through by a heat transfer medium. An additional heating of the adsorber during the first hour of regeneration is already sufficient.
- the duration of the indirect heating of the adsorber should be at least 30 minutes.
- the heat transfer medium should have a temperature of 70 to 180 ° C.
- the area to be heated should be at least 10% of the adsorber height.
- the drying time for the loaded bed can be reduced by up to 50%. This is achieved in particular by the fact that the required heat for heating the adsorber is introduced more rapidly than hitherto usual via the drying gas stream. Thus, in the area of the macroporous silica gel, ie where the largest amount of water is bound, the drying process is much more effective.
- the indirect heating of the adsorber during the drying step is only required over a period of up to 1 hour. Afterwards the heating can be switched off.
- the advantage of the proposed method is a closed biogas material cycle. Since the regeneration of the adsorbent takes place exclusively with purified biogas, absolutely no foreign substances can reach the biomethane during drying. The dried biomethane can thus be fed into a natural gas grid without problems, if necessary after the pressure has been increased, or fed to another use. the. When the condensate accumulating during drying is returned to a preliminary stage for biogas production, no methane losses occur. This procedure is thus very economical.
- the selected combination of the composition of the Adsorber- spill is matched in their activity on the amount of water to be separated and the regeneration conditions.
- the water content in the purified biogas (biomethane) can thus be reduced from about 5 g / Nm 3 to at least 10 mg / Nm 3 or even below, with the time to maximum loading and the time for a thermally gentle regeneration (temperature max ., Up to 150 ° C) and cooling of the loaded bed can be kept approximately the same. Under thermally more favorable conditions, indirect heating of the adsorber, the regeneration period for the loaded adsorber column can be further reduced.
- Biogas produced from biological waste material in a fermenter is cleaned of unwanted minor constituents, whereby contained carbon dioxide is removed by means of a pressureless amine wash.
- 30 Nm 3 / h of purified biogas, so-called biomethane at a temperature of 38 ° C are withdrawn from the scrubbing column.
- the biomethane has the following composition: CH 4 95.2% by volume
- the withdrawn via the line 1 biomethane is passed in a first heat exchanger W 1 to about 22 ° C and then via the line 2 to the downstream, second heat exchanger W2 and cooled in this up to 5 ° C.
- Via the lines 9 and 10 separated water is discharged into a container not shown in detail, optionally stored and returned to the biogas production or purification.
- two identical adsorbers A1 and A2 with a bed height of 700 mm and a diameter of 300 mm are arranged below, which are alternately used for drying the biomethane and subjected to regeneration after loading. While one absorber is in the drying mode, the other adsorber is regenerated.
- Both adsorbers A 1 and A2 contain a loose bed consisting of two different adsorbents S1 and S2.
- the lower bed S1 consists of 20 l of silica gel with an average pore diameter of> 50 to 100 nm (macropores) and 30 l of silica gel with an average pore diameter of 25 nm (mesopores), which are separated by a gas-permeable bottom. The openings in the bottom are so small that mixing different silica gel particles is excluded.
- mesoporous silica pad is a bed S2 of molecular sieves (zeolites) with a pore diameter of 0.4 nm, in an amount of 5 l.
- the silica pad and molecular sieves are separated by a gas-permeable bottom so that the particles can not mix.
- the biomethane is fed via line 3 to one of the two adsorbers A1 or A2, for example the adsorber A1, and during contact with the adsorber A1. dried sorbents.
- the other adsorber A2 which has been loaded in the meantime, is regenerated.
- the biomethane to be dried flows after leaving the second heat exchanger W2 at a temperature of 5 ° C from below through the bed in the adsorber A1 and is withdrawn at the top of the adsorber A1 via line 4.
- the drying takes place without pressure, it is only the suction pressure to promote the gas flow, which is about 10 mbar.
- the dimensioning of the adsorber column and the flow rate are determined experimentally, taking into account an effective mass transfer zone.
- the special selection and composition of the adsorbent allows a relatively long service life. Only after an adsorption time of 14 hours is the breakthrough of the moist gas with the consequence of the diversion of the gas stream to the other, in the meantime regenerated adsorber column 2. During the first 14 hours of adsorption, the water content in the dried biomethane is only 10 mg / Nm 3 (Dew point -63 ° C). The dried biomethane (temperature about 25 ° C) withdrawn via line 5 after compaction can be fed directly into a natural gas grid.
- the loaded adsorber column A2 is regenerated as follows:
- a closable branch line 6 is integrated after the compressor V1, are stripped out of the 5 m 3 / h dried biomethane.
- This partial flow is passed through a third heat exchanger W3 and heated to a temperature of about 120 ° C and passed via line 7 to the adsorber to be regenerated.
- the hot partial stream of dried biomethane is passed from above for the regeneration of the adsorber particles through the loaded adsorber column A2 and, while cooling, absorbs the moisture contained in these particles.
- the partial stream intended for regeneration is pumped through the adsorber column at a pressure of 40 mbar.
- the adsorber After a regeneration period of about 12 hours, the adsorber has again a sufficient loading capacity.
- the laden with moisture biomethane is recycled in the cycle to be dried Biomethangasstrom.
- the line 6 is switched off.
- the transport of the cooled biomethane is carried out via line 7.
- the biomethane used for cooling is returned via line 11 back into the biomethane cycle.
- the switch from Adsober A1 to adsorber A2. Now, the loaded adsorber A1 is regenerated and the adsorber A2 used for drying.
- the regeneration of the loaded adsorber column is carried out under the same conditions as in Example 1, wherein additionally during the first hour of the lower portion (up to a height of about 300 mm) of the adsorber column is heated with a liquid heat carrier at a temperature of 150 ° C. , At the same time as in Example 1 5 m 3 / h of dried biomethane with a temperature of about 120 ° C and a pressure of 40 mbar passed through the bed of Adsorberklale.
- the heat contained in the drying gas can thus be used more effectively for the further drying of the bed, since the adsorber by the indirect heating already in the area where the greatest proportion of moisture is heated up.
- the adsorber After a drying time of about 8 hours, the adsorber has again reached a sufficient loading capacity and is cooled analogously as in the example for two hours. After 10 hours regeneration the adsorber bed is fully operational again. In the subsequent use of the adsorber column showed that the bed has a significantly higher loading capacity compared to Example 1.
- the water content in the dried biomethane is only 4 mg / Nm 3 (dew point -70 ° C).
- the proportion of water in the dried biomethane increases to 10 mg / Nm 3 (dew point -63 ° C).
- the proportion of water in the dried biomethane is 50 to 80 mg / Nm 3 for up to 10 hours, after which it increases to 160 mg / Nm 3 in 1 hour.
- Example 2 In contrast to Example 1, only one bed consisting of 55 l of silica gel with a pore diameter of 25 nm is used to dry the moist biomethane. Under the same conditions as in Example 1, the adsorption period of 10 hours already leads to the breakthrough of the moist gas.
- the proportion of water in the dried biomethane is 40 to 50 mg / Nm 3 for up to 12 hours, after which it increases to 145 mg / Nm 3 in 1 hour.
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Abstract
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Priority Applications (7)
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CA2791911A CA2791911A1 (en) | 2010-03-12 | 2011-03-08 | Method for the absorptive drying of purified biogas and for regenerating laden adsorbents |
AU2011226389A AU2011226389A1 (en) | 2010-03-12 | 2011-03-08 | Method for the absorptive drying of purified biogas and for regenerating laden adsorbents |
EP11711266.4A EP2544794B1 (de) | 2010-03-12 | 2011-03-08 | Verfahren zur adsorptiven trocknung von gereinigtem biogas und regenerierung beladener adsorptionsmittel |
BR112012022972A BR112012022972A2 (pt) | 2010-03-12 | 2011-03-08 | processo para a secagem absorvente de biogás purificado e a regeneração de agentes de absorção carregados. |
CN201180013653.8A CN102821833B (zh) | 2010-03-12 | 2011-03-08 | 对纯化沼气进行吸附式干燥和再生装满的吸附剂的方法 |
US13/634,326 US8747522B2 (en) | 2010-03-12 | 2011-03-08 | Method for the adsorptive drying of purified biogas and for regenerating laden adsorbents |
RU2012142676/05A RU2012142676A (ru) | 2010-03-12 | 2011-03-08 | Способ адсорбционной сушки очищенного биогаза и регенерация загруженных адсорбентов |
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DE102010011347.6 | 2010-03-12 | ||
DE102010011347A DE102010011347B4 (de) | 2010-03-12 | 2010-03-12 | Verfahren zur adsorptiven Trocknung von gereinigtem Biogas und Regenerierung beladener Adsorptionsmittel |
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PCT/EP2011/001116 WO2011110322A1 (de) | 2010-03-12 | 2011-03-08 | Verfahren zur adsorptiven trocknung von gereinigtem biogas und regenerierung beladener adsorptionsmittel |
Country Status (9)
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US (1) | US8747522B2 (de) |
EP (1) | EP2544794B1 (de) |
CN (1) | CN102821833B (de) |
AU (1) | AU2011226389A1 (de) |
BR (1) | BR112012022972A2 (de) |
CA (1) | CA2791911A1 (de) |
DE (2) | DE202010017546U1 (de) |
RU (1) | RU2012142676A (de) |
WO (1) | WO2011110322A1 (de) |
Cited By (2)
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CN103111163A (zh) * | 2013-03-06 | 2013-05-22 | 广西大学 | 一种适用于低焓能源再生的沼气脱水干燥剂 |
IT201700103870A1 (it) * | 2017-09-18 | 2019-03-18 | Criotec Impianti S P A | Impianto e procedimento per l'upgrading di biogas. |
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US9433890B2 (en) * | 2013-01-10 | 2016-09-06 | Mitsubishi Heavy Industries, Ltd. | Dehydration equipment, gas compression system, and dehydration method |
JP5968252B2 (ja) | 2013-03-04 | 2016-08-10 | 大阪瓦斯株式会社 | メタンガス濃縮方法 |
DE102014108977A1 (de) | 2014-06-26 | 2015-12-31 | Parker Hannifin Manufacturing Germany GmbH & Co. KG Hiross Zander Division | Vorrichtung und Verfahren zum Trocknen von Gasen |
CN104324688B (zh) * | 2014-10-21 | 2016-09-14 | 杭州中泰深冷技术股份有限公司 | 一种用低压氮气进行分子筛再生节能***及方法 |
ES2625174T3 (es) | 2015-02-27 | 2017-07-18 | Fcc Aqualia, S.A. | Dispositivo y método para retirada simultánea de sulfuro de hidrógeno y dióxido de carbono del biogás |
DE102015204620A1 (de) * | 2015-03-13 | 2016-09-15 | Bayerische Motoren Werke Aktiengesellschaft | Brennstoffzellensystem mit einem befeuchteten Oxidationsmittelstrom |
CN108273359A (zh) * | 2018-01-31 | 2018-07-13 | 天津大学 | 一种低温沼气纯化装置 |
US10794167B2 (en) | 2018-12-04 | 2020-10-06 | Schlumberger Technology Corporation | Method and system for removing contaminants from a gas stream using a liquid absorbent |
DE202019001610U1 (de) | 2019-04-09 | 2019-05-08 | Silica Verfahrenstechnik Gmbh | Vorrichtung zum Trocknen und Reinigen von Wasserstoff enthaltenden Gasen |
DE202019001609U1 (de) | 2019-04-09 | 2019-05-14 | Silica Verfahrenstechnik Gmbh | Vorrichtung zum Trocknen und Reinigen von Wasserstoff enthaltenden Gasen |
WO2023165736A1 (de) * | 2022-03-01 | 2023-09-07 | Linde Gmbh | Verfahren und anlage zur bereitstellung von gasförmigem drucksauerstoff |
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-
2011
- 2011-03-08 US US13/634,326 patent/US8747522B2/en active Active
- 2011-03-08 RU RU2012142676/05A patent/RU2012142676A/ru not_active Application Discontinuation
- 2011-03-08 BR BR112012022972A patent/BR112012022972A2/pt not_active IP Right Cessation
- 2011-03-08 EP EP11711266.4A patent/EP2544794B1/de active Active
- 2011-03-08 AU AU2011226389A patent/AU2011226389A1/en not_active Abandoned
- 2011-03-08 CN CN201180013653.8A patent/CN102821833B/zh not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
DE202010017546U1 (de) | 2012-03-06 |
RU2012142676A (ru) | 2014-04-20 |
BR112012022972A2 (pt) | 2017-03-21 |
CA2791911A1 (en) | 2011-09-15 |
CN102821833B (zh) | 2014-07-02 |
CN102821833A (zh) | 2012-12-12 |
DE102010011347A1 (de) | 2011-09-15 |
DE102010011347B4 (de) | 2012-03-01 |
US20130000486A1 (en) | 2013-01-03 |
US8747522B2 (en) | 2014-06-10 |
EP2544794A1 (de) | 2013-01-16 |
AU2011226389A1 (en) | 2012-10-18 |
EP2544794B1 (de) | 2014-07-16 |
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