IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0835112
(2010-07-13)
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등록번호 |
US-8268044
(2012-09-18)
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발명자
/ 주소 |
- Wright, Andrew David
- White, Vincent
- Fogash, Kevin Boyle
- Kloosterman, Jeffrey William
- Hufton, Jeffrey Raymond
- Schaffer, Charles Linford
|
출원인 / 주소 |
- Air Products and Chemicals, Inc.
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
77 인용 특허 :
7 |
초록
▼
A feed stream, comprising hydrogen sulphide (H2S), carbon dioxide (CO2), hydrogen (H2) and, optionally, carbon monoxide (CO), is separated into at least a CO2 product stream and an H2 or H2 and CO product stream. The stream is separated using a pressure swing adsorption system, an H2S removal system
A feed stream, comprising hydrogen sulphide (H2S), carbon dioxide (CO2), hydrogen (H2) and, optionally, carbon monoxide (CO), is separated into at least a CO2 product stream and an H2 or H2 and CO product stream. The stream is separated using a pressure swing adsorption system, an H2S removal system and a further separation system, which systems are used in series to separate the stream. The method has particular application in the separation of a sour (i.e. sulphur containing) syngas, as for example produced from the gasification of solid or heavy liquid carbonaceous feedstock.
대표청구항
▼
1. A method for separating a feed stream, comprising at least H2S, CO and H2, into at least a CO2 product stream and an H2 or H2 and CO product stream (the “H2/CO product stream”), wherein the feed stream is formed from a sour syngas stream obtained from gasification of a solid or liquid carbonaceou
1. A method for separating a feed stream, comprising at least H2S, CO and H2, into at least a CO2 product stream and an H2 or H2 and CO product stream (the “H2/CO product stream”), wherein the feed stream is formed from a sour syngas stream obtained from gasification of a solid or liquid carbonaceous feedstock and is separated using a pressure swing adsorption system (the “H2/CO-PSA system”), an H2S removal system, and a further separation system, and wherein: the feed stream is introduced into either the H2/CO-PSA system or the H2S removal system;the H2/CO-PSA system either separates the feed stream to provide the H2/CO product stream and a stream enriched in CO2 and H2S, or separates a stream already depleted in H2S by the H2S removal system to provide the H2/CO product stream and a stream enriched in CO2 and depleted in H2S;the H2S removal system either processes the feed stream to provide a stream depleted in H2S, or processes a stream already enriched in CO2 and H2S by the H2/CO-PSA system to provide a stream enriched in CO2 and depleted in H2S, or processes a stream already enriched in CO2 and H2S by the H2/CO-PSA system and further enriched in CO2 and H2S by the further separation system to provide the CO2 product stream; andthe further separation system either separates a stream already enriched in CO2 and H2S by the H2/CO-PSA system to provide a stream further enriched in CO2 and H2S and a stream comprising H2 or H2 and CO, or separates a stream already enriched in CO2 by the H2/CO-PSA system and depleted in H2S by the H2S removal system to provide the CO2 product stream and a stream comprising H2 or H2 and CO. 2. The method of claim 1, wherein the H2S removal system separates the feed stream, or said stream already enriched in CO2 and H2S by the H2/CO-PSA system, or said stream already enriched in CO2 and H2S by the H2/CO-PSA system and further enriched in CO2 and H2S by the further separation system, to provide an H2S enriched stream in addition to providing said stream depleted in H2S, said stream enriched in CO2 and depleted in H2S, or said CO2 product stream. 3. The method of claim 2, wherein the H2S removal system is another pressure swing adsorption system (the “sour-PSA system”). 4. The method of claim 1, wherein the further separation system is a partial condensation system. 5. The method of claim 1, wherein the further separation system is a membrane separation system. 6. The method of claim 1, wherein the feed stream comprises from about 500 ppm to about 5 mole % H2S, from about 10 to about 60 mole % CO2, and from about 35 mole % to the remainder of H2 or a mixture of H2 and CO. 7. The method of claim 1, wherein at least about 80% of the H2 present in the feed stream is recovered in the H2/CO product stream and at most about 25% of the CO2 present in the feed stream is recovered the H2/CO product stream, and wherein the H2/CO product stream contains at most about 50 ppm H2S. 8. The method of claim 1, wherein at least about 75% of the H2 and CO present in the feed stream is recovered the H2/CO product stream and at most about 25% of the CO2 present in the feed stream is recovered the H2/CO product stream, and wherein the H2/CO product stream contains at most about 50 ppm H2S. 9. The method of claim 1, wherein the CO2 product stream has a CO2 concentration of at least about 90 mole % and contains at most about 100 ppm H2S. 10. The method of claim 2, wherein the H2S enriched stream has a H2S concentration of from about 20 to about 80 mol %. 11. The method of claim 1, wherein some or all of the stream comprising H2 or H2 and CO obtained from the further separation system is recycled to the H2/CO-PSA system for further separation. 12. The method of claim 1, wherein some or all of the stream comprising H2 or H2 and CO obtained from the further separation system is combusted to generate power. 13. The method of claim 1, wherein some or all of the stream comprising H2 or H2 and CO obtained from the further separation system is combusted in the presence of sufficient O2 to convert all or substantially all of the H2 and CO in the part of the stream combusted to H2O and CO2. 14. The method of claim 3, wherein steam is used as a purge gas for purging the sour-PSA. 15. The method of claim 3, wherein some or all of the stream comprising H2 or H2 and CO obtained from the further separation system is used as a purge gas for purging the sour-PSA. 16. The method of claim 1, wherein: the feed stream is introduced into the H2/CO-PSA system;the H2/CO-PSA system separates the feed stream to provide the H2/CO product stream and a stream enriched in CO2 and H2S;the H2S removal system processes said stream enriched in CO2 and H2S to provide a stream enriched in CO2 and depleted in H2S; andthe further separation system separates said stream enriched in CO2 and depleted in H2S to provide the CO2 product stream and a stream comprising H2 or H2 and CO. 17. The method of claim 16, wherein feed stream further comprises water, and the H2S removal system processes said stream enriched in CO2 and H2S to provide a stream enriched in CO2 and depleted in H2S and water. 18. The method of claim 1, wherein: the feed stream is introduced into the H2S removal system;the H2S removal system processes the feed stream to provide a stream depleted in H2S;the H2/CO-PSA system separates said stream depleted in H2S to provide the H2/CO product stream and a stream enriched in CO2 and depleted in H2S; andthe further separation system separates said stream enriched in CO2 and depleted in H2S to provide the CO2 product stream and a stream comprising H2 or H2 and CO. 19. The method of claim 18, wherein feed stream further comprises water, and the H2S removal system processes the feed stream to provide a stream depleted in H2S and water. 20. The method of claim 1, wherein: the feed stream is introduced into the H2/CO-PSA system;the H2/CO-PSA system separates the feed stream to provide the H2/CO product stream and a stream enriched in CO2 and H2S;the further separation system separates said stream enriched in CO2 and H2S to provide a stream further enriched in CO2 and H2S and a stream comprising H2 or H2 and CO;the H2S removal system processes said stream further enriched in CO2 and H2S to provide the CO2 product stream. 21. Apparatus for separating a feed stream, formed from a sour syngas stream obtained from gasification of a solid or liquid carbonaceous feedstock and comprising at least H2S, CO2 and H2, into at least a CO2 product stream and an H2 or H2 and CO product stream (the “H2/CO product stream”), the apparatus comprising: a pressure swing adsorption system (the “H2/CO-PSA system”) for separating the feed stream to provide the H2/CO product stream and a stream enriched in CO2 and H2S;a conduit arrangement for introducing the feed stream into the H2/CO-PSA system;a conduit arrangement for withdrawing the H2/CO product stream from the H2/CO-PSA system;an H2S removal system, for processing said stream enriched in CO2 and H2S to provide a stream enriched in CO2 and depleted in H2S;a conduit arrangement for withdrawing the stream enriched in CO2 and H2S from the H2/CO-PSA system and introducing the stream into the H2S removal system;a further separation system, for separating said stream enriched in CO2 and depleted in H2S to provide the CO2 product stream and a stream comprising H2 or H2 and CO;a conduit arrangement for withdrawing the stream enriched in CO2 and depleted in H2S from the H2S removal system and introducing the stream into the further separation system;a conduit arrangement for withdrawing the CO2 product stream from the further separation system; anda conduit arrangement for withdrawing the stream comprising H2 or H2 and CO from the further separation system. 22. Apparatus for separating a feed stream, formed from a sour syngas stream obtained from gasification of a solid or liquid carbonaceous feedstock and comprising at least H2S, CO2 and H2, into at least a CO2 product stream and an H2 or H2 and CO product stream (the “H2/CO product stream”), the apparatus comprising: an H2S removal system, for processing the feed stream to provide a stream depleted in H2S;a conduit arrangement for introducing the feed stream into the H2S removal system;a pressure swing adsorption system (the “H2/CO-PSA system”) for separating said stream depleted in H2S to provide the H2/CO product stream and a stream enriched in CO2 and depleted in H2S;a conduit arrangement for withdrawing the stream depleted in H2S from the H2S removal system and introducing the stream into the H2/CO-PSA system;a conduit arrangement for withdrawing the H2/CO product stream from the H2/CO-PSA system;a further separation system, for separating said stream enriched in CO2 and depleted in H2S to provide the CO2 product stream and a stream comprising H2 or H2 and CO;a conduit arrangement for withdrawing the stream enriched in CO2 and depleted in H2S from the H2/CO-PSA system and introducing the stream into the further separation system;a conduit arrangement for withdrawing the CO2 product stream from the further separation system; anda conduit arrangement for withdrawing the stream comprising H2 or H2 and CO from the further separation system. 23. Apparatus for separating a feed stream, formed from a sour syngas stream obtained from gasification of a solid or liquid carbonaceous feedstock and comprising at least H2S, CO2 and H2, into at least a CO2 product stream and an H2 or H2 and CO product stream (the “H2/CO product stream”), the apparatus comprising: a pressure swing adsorption system (the “H2/CO-PSA system”) for separating the feed stream to provide the H2/CO product stream and a stream enriched in CO2 and H2S;a conduit arrangement for introducing the feed stream into the H2/CO-PSA system;a conduit arrangement for withdrawing the H2/CO product stream from the H2/CO-PSA system;a further separation system, for separating said stream enriched in CO2 and H2S to provide a stream further enriched in CO2 and H2S and a stream comprising H2 or H2 and CO;a conduit arrangement for withdrawing the stream enriched in CO2 and H2S from the H2/CO-PSA system and introducing the stream into the further separation system;a conduit arrangement for withdrawing the stream comprising H2 or H2 and CO from the further separation system;an H2S removal system, for processing said stream further enriched in CO2 and H2S to provide the CO2 product stream;a conduit arrangement for withdrawing the stream further enriched in CO2 and H2S from the further separation system and introducing the stream into the H2S removal system; anda conduit arrangement for withdrawing the CO2 product stream from the H2S removal system.
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