Patent ID: 9205382
Filing Date: 2015-12-08
Classification: B01D,C10L,Y02C

Abstract:
1. A carbon dioxide separation system, characterized in that a mixed gas ( 1 ) having a carbon dioxide concentration of 3 to 75% is introduced into a primary carbon dioxide separation device ( 4 ) equipped with a zeolite membrane ( 5 ) for carbon dioxide separation to produce a primary permeated gas ( 6 ) having a carbon dioxide concentration of 80% or more on the permeate side of the zeolite membrane ( 5 ) for carbon dioxide separation and also reduce the carbon dioxide concentration of a primary gas ( 7 ) on the non-permeate side of the zeolite membrane ( 5 ) for carbon dioxide separation to 3 to 15%, and then the primary gas ( 7 ) on the non-permeate side is introduced into a secondary carbon dioxide separation device ( 8 ) that employs an amine absorption method or a pressure swing adsorption (PSA) method to produce a secondary separated gas ( 9 ) having a carbon dioxide concentration of 80% or more separated by the secondary carbon dioxide separation device ( 8 ) and also produce a carbon-dioxide-removed gas ( 10 ) having a carbon dioxide concentration of 2% or less.