L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
대리인 / 주소
White, Allen E.
인용정보
피인용 횟수 :
0인용 특허 :
10
초록▼
The invention relates to a method for purifying a supply gaseous flow containing at least 5 vol. % of N2O and oxygen, in which: (a) the gaseous flow is contacted with a main adsorbent (3) including at least one zeolite exchanged at more than 50% by one or more metal cations and having an N2O adsorpt
The invention relates to a method for purifying a supply gaseous flow containing at least 5 vol. % of N2O and oxygen, in which: (a) the gaseous flow is contacted with a main adsorbent (3) including at least one zeolite exchanged at more than 50% by one or more metal cations and having an N2O adsorption capacity, as measured under 1 bar and at 200° C., of more than 80 Ncm/g in order to adsorb at least a portion of the N2O from said flow and to produce a purified gaseous flow; and (b) recovering a purified gaseous flow having an N2O content lower than the N2O content of the supply gaseous flow contacted with the main adsorbent during step (a).
대표청구항▼
1. A method for purifying exhaled anesthesia gas containing oxygen and at least 20% by volume of N2O, wherein: (a) at a temperature between 20° C. and 40° C. and at a pressure between 0.80 bar and 1.30 bar, the exhaled anesthesia is placed in contact with a main adsorbent, comprising at least one ze
1. A method for purifying exhaled anesthesia gas containing oxygen and at least 20% by volume of N2O, wherein: (a) at a temperature between 20° C. and 40° C. and at a pressure between 0.80 bar and 1.30 bar, the exhaled anesthesia is placed in contact with a main adsorbent, comprising at least one zeolite exchanged to over 50% by one or more metal cations, wherein the main adsorbent has an adsorption kinetics of less than 10 sec−1, and having a N2O adsorption capacity higher than 80 Ncm3/g, measured at 1 bar and 20° C., in order to adsorb at least part of the N2O from the stream and to produce a purified gas stream, and(b) a purified gas stream is recovered, having a N2O content lower than the N2O content of the exhaled anesthesia gas placed in contact with the main adsorbent in step a). 2. The method of claim 1, wherein in step b), a purified gas stream is recovered containing less than 10% by volume of N2O. 3. The method of claim 1, wherein the exhaled anesthesia qas placed in contact with the main adsorbent in step a) contains at least 30% by volume of N2O and in that in step b) a purified gas stream is recovered containing less than 10% by volume of N2O. 4. The method of claim 1, wherein the exhaled anesthesia qas placed in contact with the main adsorbent in step a) contains less than 80% by volume of N2O. 5. The method of claim 1, wherein the zeolite is of type A, X, LSX, Mordenite, Offretite, Chabazite, Clinoptilolite or Erionite. 6. The method of claim 1, wherein the zeolite is exchanged by one or more metal cations selected from Na+, Li+, K+, Ca2+, Mg2+ and Ba2+. 7. The method of claim 6 wherein the zeolite is also combined with one or more transition metals. 8. The method of claim 7, wherein the transition metals are selected from silver, zinc and copper. 9. The method of claim 1, wherein the main adsorbent has an N2O adsorption capacity at 1 bar and 20° C. that is higher than 90 Ncm3/g. 10. The method of claim 1, wherein the exhaled anesthesia gas also contains water vapor, CO2 and/or argon and/or nitrogen. 11. The method of claim 1, wherein the CO2 adsorption capacity of the main adsorbent, measured at 0.04 bar and 20° C., is higher than or equal to 30 Ncm3/g. 12. The method of claim 1, wherein the method further comprises, prior to step a), placing the exhaled anesthesia gas in contact with a secondary adsorbent comprising alumina in order to remove at least part of the H2O and/or the CO2. 13. The method of claim 1, wherein the flow rate of the exhaled anesthesia qas to be purified is between 1 and 30 Nliters/min. 14. The method of claim 1, wherein the exhaled anesthesia gas was exhaled by a human being. 15. The method of claim 1, wherein in step b), a purified gas stream is recovered containing less than 5% by volume of N2O. 16. The method of claim 1, wherein: the exhaled anesthesia gas placed in contact with the main adsorbent in step a) contains from at least 30% by volume to less than 70% by volume of N2O, an N2O adsorption capacity, measured at 1 bar and 20° C., that is between 90 and 120 Ncm3/g and a CO2 adsorption capacity, measured at 0.04 bar and 20° C., higher than or equal to 50 Ncm3/g;the zeolite is of type A, X, LSX, Mordenite, Offretite, Chabazite, Clinoptilolite or Erionite and is exchanged by one or more metal cations selected from Na+, Li+, K+, Ca2+, Mg2+and Ba2+;in step b) the purified gas stream is recovered containing less than 5% by volume of N2O; andthe flow rate of the exhaled anesthesia qas to be purified is between 8 and 15 Nliters/min. 17. The method of claim 16 wherein the zeolite is also combined with one or more transition metals.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (10)
Nakamura, Morimitsu; Fujie, Kazuhiko; Tatsumi, Yasuo; Kawai, Masato, Apparatus and method for purifying air used in cryogenic air separation.
Georges Kraus FR; Cyrille Millet FR; Serge Moreau FR; Jean-Pierre Gabillard FR, Process for purifying air by adsorption over a barium-exchanged zeolite.
Golden Timothy Christopher ; Taylor Fred William ; Johnson Leighta Maureen ; Malik Nasim Hassan,GBX ; Raiswell Christopher James,GBX, Purification of air.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.