Decarbonating gas streams using zeolite adsorbents
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-053/047
B01J-020/18
B01J-020/10
C01B-039/22
C01B-039/00
출원번호
UP-0623801
(1999-03-04)
등록번호
US-7608134
(2009-11-10)
우선권정보
FR-98 02819(1998-03-09)
국제출원번호
PCT/FR99/000497
(1999-03-04)
§371/§102 date
20001117
(20001117)
국제공개번호
WO99/046031
(1999-09-16)
발명자
/ 주소
Plee, Dominique
출원인 / 주소
CECA S.A.
대리인 / 주소
Sundby, Esq., Suzannah K.
인용정보
피인용 횟수 :
3인용 특허 :
4
초록▼
The invention concerns a method for decarbonating gas streams polluted by CO2, which consists in contacting them with an adsorbent consisting of an agglomerate of zeolite X with an Si/Al ratio of 1 to 1.15, highly sodium-exchanged comprising not more than 20% of inert binder, to eliminate at least t
The invention concerns a method for decarbonating gas streams polluted by CO2, which consists in contacting them with an adsorbent consisting of an agglomerate of zeolite X with an Si/Al ratio of 1 to 1.15, highly sodium-exchanged comprising not more than 20% of inert binder, to eliminate at least the carbon dioxide.
대표청구항▼
The invention claimed is: 1. Process for the decarbonation of gas flows, contaminated with CO2, comprising placing in contact the gas flow to be purified, in an adsorption zone, with at least one adsorbent consisting essentially of a zeolite containing NaLSX type with an Si/Al ratio of 1 to 1.15, e
The invention claimed is: 1. Process for the decarbonation of gas flows, contaminated with CO2, comprising placing in contact the gas flow to be purified, in an adsorption zone, with at least one adsorbent consisting essentially of a zeolite containing NaLSX type with an Si/Al ratio of 1 to 1.15, exchanged with sodium to a degree of greater than or equal to 98%, the degree of exchange being expressed as the ratio between the number of sodium ions and the number of aluminum atoms in a tetrahedral position, the remainder of the exchange capacity being occupied by potassium ions, agglomerated with a binder, the content of residual inert binder in the adsorbent being less than or equal to 20% by weight. 2. Process according to claim 1, wherein the content of residual inert binder in the agglomerated zeolite composition is not more than 5% by weight. 3. Process according to claim 1, wherein it is performed by pressure swing adsorption (PSA). 4. Process according to claim 1, wherein the zeolite X has an Si/Al ratio of 1. 5. Process according to claim 1, wherein adsorption pressures are between 1 and 10 bar and desorption pressures are between 0.1 and 2 bar. 6. Process according to claim 1, wherein it comprises carrying out a treatment cycle comprising: a) passing the contaminated gas flow into an adsorption zone comprising an adsorbent bed, the adsorbent bed ensuring separation of the contaminant(s) by adsorption, b) desorbing the adsorbed CO2 by establishing a pressure gradient and gradually lowering the pressure in the adsorption zone to recover the CO2 at the adsorption zone inlet; c) raising the pressure of the adsorption zone by introducing a stream of pure gas via the adsorption zone outlet. 7. Process according to claim 6, in which the adsorbent is regenerated at a temperature between 100 and 120° C. 8. Process for purifying air contaminated with CO2 and H2O, comprising gas flow to be purified is placed in contact, in an adsorption zone, with at least one drying agent and at least with an adsorbent consisting generally of zeolite containing NaLSX type with an Si/Al ratio of 1 to 1.15, exchanged with sodium to a degree of greater than or equal to 98%, the degree of exchange being expressed as the ratio between the number of sodium ions and the number of aluminum atoms in a tetrahedral position, the remainder of the exchange capacity being occupied by potassium ions, agglomerated with a binder, the content of residual inert binder in the adsorbent being less than or equal to 20% by weight. 9. Process according to claim 8, wherein it comprises carrying out a treatment cycle comprising: a) passing contaminated gas flow into an adsorption zone comprising a drying-agent bed and an adsorbent bed, with at least one adsorbent consisting essentially of a zeolite containing NaLSX type with an Si/Al ratio of 1 to 1.15, exchanged with sodium to a degree of greater than or equal to 98%, the degree of exchange being expressed as the ratio between the number of sodium ions and the number of aluminum atoms in a tetrahedral position, the remainder of the exchange capacity being occupied by potassium ions, agglomerated with a binder, the content of residual inert binder in the adsorbent being less than or equal to 20% by weight, b) desorbing the adsorbed CO2 by establishing a pressure gradient and gradually lowering the pressure in the adsorption zone to recover the CO2 at the adsorption zone inlet; c) raising the pressure of the absorption zone by introducing a stream of pure gas via the adsorption zone outlet. 10. Process according to claim 1, wherein the gas is air. 11. Process according to claim 3, wherein the process is performed by pressure temperature swing adsorption (PTSA). 12. Process according to claim 8, wherein the drying-agent contains alumina.
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이 특허에 인용된 특허 (4)
Jain Ravi ; Tseng James K., Air purification process.
Millet Cyrille,FRX ; Bourgeois Philippe,FRX ; Kraus Georges,FRX ; Gabillard Jean-Pierre,FRX, Process for purifying air by adsorption before cryogenic distillation.
Gittleman Craig S. ; Ojo Adeola Florence ; Fitch Frank R. ; Bulow Martin ; Balse Vijay R. ; Connolly Philip, Removal of carbon dioxide from gas streams.
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