CO2-facilitated transport membrane and method for producing the same
AssigneeRenaissance Energy Research Corporation
InventorsOsamu Okada, Masaaki Teramoto, Reza Yegani, Hideto Matsuyama, Keiko Shimada, Kaori Morimoto
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Abstract
A CO2-facilitated transport membrane of excellent carbon dioxide permeability and CO2/H2 selectivity, which can be applied to a CO2 permeable membrane reactor, is stably provided. The CO2-facilitated transport membrane is formed such that a gel layer 1 obtained by adding cesium carbonate to a polyvinyl alcohol-polyacrylic acid copolymer gel membrane is supported by a hydrophilic porous membrane 2. More preferably, a gel layer supported by a hydrophilic porous membrane 2 is coated with hydrophilic porous membranes 3 and 4.
Claims9
An apparatus for removing CO2 from a mixed gas containing at least CO2 and H2, wherein:
- the apparatus comprises a CO2-facilitated transport membrane and is adapted to feed the mixed gas to a feed side of the CO2-facilitated transport membrane at 100° C. or higher and to remove the CO2 from the mixed gas at a permeation side of the CO2-facilitated transport membrane;
- the CO2-facilitated transport membrane comprises a gel layer that is supported by a hydrophilic porous membrane and has CO2/H2 selectivity under a temperature condition of 100° 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%.
Dependencies are inferred from the claim text.