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    • 40. 发明专利
    • Carbon dioxide gas separation membrane
    • JP3481793B2
    • 2003-12-22
    • JP24532096
    • 1996-09-17
    • 株式会社東芝
    • 和明 中川秀行 大図師浩 富松芳浩 赤坂
    • B01D53/34B01D53/22B01D53/62B01D71/02C01B32/50C01B31/20
    • Y02A50/2342Y02C10/04Y02C10/10Y02P20/152
    • PROBLEM TO BE SOLVED: To provide a method for separating carbon dioxide gas by which it is possible to separate and recover carbon dioxide gas contained in exhaust gas from an energy plant or a chemical plant rapidly and at a low energy consumption rate and high efficiency. SOLUTION: This method for separating carbon dioxide gas consists of a first step to divide a first gas 7 containing carbon dioxide gas CO2 with a relatively high partial pressure and a second gas 8 containing the carbon dioxide gas CO2 with a relatively low partial pressure in an area containing a least, one fiber 3 selected between a composite oxide which generates carbonate through a chemical reaction with the carbon dioxide gas CO2 and an oxide which releases the carbon dioxide gas CO2 through a chemical reaction with the carbonate, a second step to heat the fiber 3 contained in the area at 500 deg.C or more and generate the molten carbonate through a chemical reaction between the carbon dioxide gas CO2 contained in the first gas 7 and the fiber 3 at a part in which the first gas 7 comes into contact with the area, and a third step to generate the carbon dioxide gas CO2 by decomposing the molten carbonate in the area at a part in which the second gas 8 comes into contact with the area and releases the carbon dioxide gas CO2 to the second gas 8 from the area. Both second and third steps are repeated a plural number of times.