Patent ID: 7014680

Claim:
A gas separation method for separating at least one type of gas component from a mixed gas containing at least two types of gas components selected from a group consisting of carbon dioxide (CO 2 ), hydrogen (H 2 ), oxygen (O 2 ), nitrogen (N 2 ), methane (CH 4 ), normal butane (n-C 4 H 10 ), isobutane (i-C 4 H 10 ), sulfur hexafluoride (SF 6 ), ethane (C 2 H 6 ), ethylene (C 2 H 4 ), propane (C 3 H 8 ), propylene (C 3 H 6 ), carbon monoxide (CO), and nitrogen monoxide (NO), by making said mixed gas components permeate through a DDR type zeolite membrane being formed as a membrane on a substrate and including a main component of silica, wherein each single gas permeance at room temperature and 100° C. are different, respectively, to separate said at least one type of gas component.