Patent ID: 8617297

Claim:
An apparatus for removing CO 2 from a mixed gas containing at least CO 2 and H 2 , wherein: the apparatus comprises a CO 2 -facilitated transport membrane and is adapted to feed the mixed gas to a feed side of the CO 2 -facilitated transport membrane at 100Â° C. or higher and to remove the CO 2 from the mixed gas at a permeation side of the CO 2 -facilitated transport membrane; the CO 2 -facilitated transport membrane comprises a gel layer that is supported by a hydrophilic porous membrane and has CO 2 /H 2 selectivity under a temperature condition of 100Â° C. or higher; the gel layer is formed from a gel membrane containing moisture, a polyvinyl alcohol-polyacrylic acid copolymer gel membrane, and an additive of cesium carbonate or cesium bicarbonate or cesium hydroxide or rubidium carbonate or rubidium bicarbonate or rubidium hydroxide; and the gel layer is formed such that a weight ratio of the additive to a total weight of the polyvinyl alcohol-polyacrylic acid copolymer gel membrane and the additive is set to be in a range of 65% to 85%.