Sumitomo Chemical Company, Limited

Renaissance Energy Research Corporation

Emi Okubo

Osamu Okada

Nobuaki Hanai

Nobutaka Kodama

A carbon dioxide separation method including the steps of: feeding a mixed gas that contains at least carbon dioxide and water vapor to a carbon dioxide separation membrane that contains a hydrophilic resin and a carbon dioxide carrier; separating, from the mixed gas, a permeation gas that contains the carbon dioxide by use of the carbon dioxide separation membrane; adjusting temperature of gas which contacts the carbon dioxide separation membrane so that a temperature difference between the mixed gas and the permeation gas is not lower than 0&#xb0; C. and not higher than 20&#xb0; C.; and adjusting pressure of the permeation gas, the pressure of the permeation gas and water vapor partial pressure in the mixed gas satisfying the following formula (1): 2.5 kPaA&#x3c;(pressure of permeation gas)&#x3c;(water vapor partial pressure in mixed gas) . . . (1).

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Osaka, Japan

Emi Okubo