1986 Fiscal Year Final Research Report Summary
Carrier-Mediated Transport Membranes for Gas Separation Processes
| Project/Area Number |
59850136
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
工業物理化学
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| Research Institution | Nagasaki University |
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Principal Investigator |
KAGAWA Shuichi Nagasaki University, Faculty of Engineering, Prof., 工学部, 教授 (80037746)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUMOTO Hideyuki JGC Corporation, R & D Division, 技術開発部, 主任研究員
FUCHITA Yoshio Nagasaki University, Faculty of Engineering, Res. Assist., 工学部, 助手 (00100884)
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| Project Period (FY) |
1984 – 1986
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| Keywords | Carrier-mediated transport / Membrane separation / Gas separation / Liquid membrane / Oxygen / Carbon monoxide / Carbon dioxide |
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| Research Abstract |
With a view of developing a high efficient membrane for gas separation processes, a carrier-mediated transport of gases was investigated for some metal ion-liquid oligomer systems. In this system, a liquid oligomer acts as a metal complex ligand and, at the same time, as a liquid membrane matrix substance. Employing a low volatile solvent such as liquid oligomer can result in stabilizing the form of the membrane. The results obtained are as follows.
1. The permselectivity of <CO_2> through liquid polyethylene glycol (PEG) membrane was enhanced by the addition of alkali metal salts to PEG. It was suggested that the enhancement is attributable to the increase in sulubilities of <CO_2> resulting from the acid-base interaction between <CO_2> molecules and naked counter anions.
2. The transport of <O_2> was facilitated by a <Cu^+> -tetraethylenepentamine (tetren) system which absorbs <O_2> reversibly with a stoicheiometry of Cu : <O_2> = 1 : 1 accompanied by a <Cu^+> <<-!->> <Cu^(2+)> cycle.
3. The <Cu^+> -tetren system facilitated also the transportation of CO accompanied by the reversible formation of a <Cu^+> -carbonyl complex.
4. The permselectivities of ethylene and propylene were improved in the <Rh^(3+)> -added PEC membrane. Addition of <KNO_3> to the <Rh^(3+)> -PEG system resulted in further enhancement of permselectivity. Sorption and permeation measurements demonstrated that the olefin transport mediated by <Rh^(3+)> becomes more predominant as a result of the salting-out effect induced by the added salt.
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