Endothermal carbon dioxide absorption |
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| 申请号 | US46473874 | 申请日 | 1974-04-29 | 公开(公告)号 | US3906945A | 公开(公告)日 | 1975-09-23 |
| 申请人 | ATO INC; | 发明人 | NETTELAND LOYAL G; HEINTZ CLIFFORD E; | ||||
| 摘要 | The absorption of CO2 from gas streams by lithium hydroxide can be caused to proceed at least partially by the reaction The reaction is endothermal, and more efficient than the normally occurring reaction. The presence of a molecular sieve and water favor the bicarbonate reaction. |
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| 权利要求 | 1. THE METHOD OF ABSORBING CARBON DIOXIDE FROM RESPIRATORY GASES IN A RECIRCULATORY BREATHING APPARATUS COMPRISING: A. FORMING A RECIRCULATORY GAS STREAM FLOW FROM A BREATHING ZONE TO A CARBON DIOXIDE ABSORPTION ZONE AND BACK TO SAID BREATHING ZONE IN A CIRCULATORY FLOW SYSTEM, B. INTRODUCING TO SAID BREATHING ZONE CARBON DIOXIDE CONTAINING RESPIRATORY EXHALATIONS, C. REMOVING FROM SAID BREATHING ZONE RESPIRATORY EXHALATIONS, D. CAUSING SAID EXHALATIONS TO FLOW IN SAID RECIRCULATING GAS STREAM FLOW, E. IN SAID CARBON DIOXIDE ABSORPTION ZONE, CAUSING RECIRCULATING GAS STREAM TO PASS THROUGH A FIRST CHAMBER CONTAINING LITHIUM HYDROXIDE AND IMMEDIATELY THEREAFTER THROUGH A SECOND CHAMBER CONTAINING HYDRATED MOLECULAR SIEVE CONTAINING ABOUT 40 TO 60 MOLES, PER MOLE OF SAIL SIEVE, OF WATER, CAUSING SAID CARBON DIOXIDE TO REACT WITH SAID LITHIUM HYDROXIDE AT LEAST IN PART BY THE REACTION 2. The method of claim 1 wherein said molecUlar sieve is a crystalline zeolite. 3. The method of claim 2 wherein said zeolite is zeolite X. 4. The method of claim 3 wherein said zeolite is zeolite 13X. 5. The method of claim 4, wherein said lithium hydroxide and said hydrated molecular sieve are present in relative volume ratio of about 2:1. 6. The method of claim 1 wherein said gas stream is passed through said absorbent medium continuously. |
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