[특허]Rapid temperature swing adsorption contactors for gas separation

ExxonMobil Research and Engineering Company

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특허 상세정보

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Rapid temperature swing adsorption contactors for gas separation

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-053/04
미국특허분류(USC)	095/104; 095/106; 095/114; 095/115; 095/139
출원번호	US-0406150 (2012-02-27)
등록번호	US-8673059 (2014-03-18)
발명자 / 주소	Leta, Daniel P. Deckman, Harry W. Ravikovitch, Peter I. Derites, Bruce A.
출원인 / 주소	ExxonMobil Research and Engineering Company
대리인 / 주소	Weisberg, David M.
인용정보	피인용 횟수 : 14 인용 특허 : 59

초록

Novel adsorbent contactors and methods are disclosed herein for use in temperature swing adsorption for gas separation applications, as well as for heat exchange applications.

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1. A swing adsorption process for separating contaminant gas components from a feed gas mixture containing at least one target gas component, which process comprises: a) conducting the feed gas mixture to a temperature swing adsorbent contactor having at least an inlet end and an outlet end, wherein the adsorbent contactor further comprises i) a plurality of open channels whose length is fluidly connecting the inlet end to the outlet end of the contactor, wherein at least one wall of said at least one open flow channel is comprised of an adsorbent material;ii) at least one support layer, in contact with, and supporting the adsorbent material; andiii) a plurality of microtubes in contact with, and supported by, the at least one support layer;b) flowing at least a portion of the feed gas mixture through the open flow channels;c) during an adsorption cycle, adsorbing at least a portion of the target gas in the adsorbent material;d) retrieving a first product stream from the outlet end, wherein the first product stream has a lower mol % of the target gas component than the feed gas mixture; ande) during a desorption cycle, passing heating fluid through at least a portion of the microtubes, thereby desorbing at least a portion of the target gas in the adsorbent material to form a second product stream. 2. The process of claim 1, wherein the adsorbent contactor comprises at least two support layers, and the support layers, when viewed in a plane perpendicular to the length of the open flow channels, are each substantially flat and are substantially parallel relative to each other. 3. The process of claim 1, wherein the at least one support layer of the adsorbent contactor is wound into a spiral when viewed in a plane perpendicular to the length of the open flow channels. 4. The process of claim 1, wherein each microtube has an inside diameter from 0.20 mm to 2 mm. 5. The process of claim 4, wherein the heating fluid is selected from water and steam. 6. The process of claim 4, wherein the heating fluid is passed through at least a portion of the microtubes during at least a portion of the desorption cycle of the temperature swing process and a cooling fluid is passed through at least a portion of the microtubes during at least a portion of the adsorption cycle of the temperature swing process. 7. The process of claim 6, wherein the cooling fluid is comprised of water. 8. The process of claim 1, wherein the target gas component is selected from CO2 and/or H2S. 9. The process of claim 1, wherein the target gas component is CO2. 10. The process of claim 1, wherein the feed gas mixture is comprised of methane. 11. The process of claim 1, wherein the adsorbent material is comprised of an 8-ring zeolite. 12. The process of claim 11, wherein the zeolite has a Si/Al ratio from about 1 to about 25. 13. The process of claim 1, wherein feed gas mixture is comprised of methane and CO2 wherein CO2 is the target gas component, and the zeolite has a diffusion coefficient for CO2 over methane (DCO2/DCH4) greater than 10. 14. The process of claim 1, wherein feed gas mixture is comprised of methane and N2 wherein N2 is the target gas component, and the zeolite has a diffusion coefficient for N2 over methane (DN2/DCH4) greater than 10. 15. The process of claim 1, wherein feed gas mixture is comprised of methane and H2S wherein H2S is the target gas component, and the zeolite has a diffusion coefficient for H2S over methane (DH2S/DCH4) greater than 10. 16. The process of claim 15, wherein the first adsorbent bed and the second adsorbent bed are comprised of a zeolite selected from DDR, Sigma-1, ZSM-58, and combinations thereof. 17. The process of claim 1, wherein the adsorbent material is comprised of a microporous material selected from zeolites, AlPOs, SAPOs, MOFs, ZIFs, carbon, and combinations and composites thereof. 18. The process of claim 1, wherein the adsorbent material is comprised of a material selected from cationic zeolites, amine-functionalized mesoporous materials, stannosilicates, carbon, and combinations and composites thereof. 19. The process of claim 1, wherein the process is a rapid cycle temperature swing adsorption process wherein the total cycle time greater than 10 seconds and less than 10 minutes. 20. The process of claim 1, wherein during the desorption cycle the temperature of the adsorbent material is increased and the partial pressure of the target gas is reduced. 21. The process of claim 20, wherein during the desorption cycle a purge gas is passed through at least a portion of the open flow channels. 22. The process of claim 1, wherein the feed gas mixture is comprised of natural gas. 23. The process of claim 22, wherein the feed gas mixture is conducted to the open flow channels at a pressure greater than 1000 psig. 24. A heat exchange process comprising: a) conducting a gaseous feed stream to a temperature swing adsorbent contactor having at least an inlet end and an outlet end and having a length, wherein the adsorbent contactor further comprises i) a plurality of open channels whose length is fluidly connecting the inlet end to the outlet end of the contactor, wherein at least one wall of said at least one open flow channel is comprised of an adsorbent material;ii) at least one support layer, in contact with, and supporting the adsorbent material; andiii) a plurality of microtubes in contact with, and supported by, the at least one support layer;b) flowing at least a portion of the gaseous feed stream at a first temperature and a first pressure through the open flow channels;c) contacting the adsorbent contactor containing the gaseous feed stream with a heat exchange fluid under conditions sufficient for the contactor to exhibit a sharp thermal wave and to form a product stream at a second temperature lower than the first temperature and a second pressure,wherein the conditions include a feed stream pressure from about 250 psig to about 2000 psig and/or a heat exchange fluid pressure sufficient to attain a differential pressure between the gaseous feed stream pressure and the heat exchange fluid pressure from about 250 psig to about 2000 psig. 25. The process of claim 24, wherein the heat exchange fluid is initially at a heat exchange temperature allowing a T90 and a T10 can be defined with respect to the first temperature and the heat exchange temperature such that a temperature differential of (T90−T10) occurs over at most 50% of the length of the contactor. 26. The process of claim 24, wherein a maximum Peclet number, Pe, is less than 10, where Pe=(U*L)/α, where U represents a heat exchange fluid velocity, L represents a characteristic distance over which heat is transported in a direction roughly perpendicular to fluid flow, and a represents an effective thermal diffusivity of the contactor over the distance L, and wherein U is from about 0.01 m/s to about 100 m/s, and L is less than 0.1 meter.

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Rapid temperature swing adsorption contactors for gas separation

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Rapid temperature swing adsorption contactors for gas separation

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