US 12,458,949 B2
Gas separation method and zeolite membrane
Katsuya Shimizu, Kasugai (JP); Makiko Ichikawa, Nagoya (JP); and Kenji Yajima, Nagoya (JP)
Assigned to NGK INSULATORS, LTD., Nagoya (JP)
Filed by NGK Insulators, Ltd., Nagoya (JP)
Filed on Sep. 14, 2022, as Appl. No. 17/931,918.
Application 17/931,918 is a continuation of application No. PCT/JP2021/004990, filed on Feb. 10, 2021.
Claims priority of application No. 2020-047803 (JP), filed on Mar. 18, 2020.
Prior Publication US 2023/0018523 A1, Jan. 19, 2023
Int. Cl. B01D 53/22 (2006.01); B01D 53/04 (2006.01); B01D 53/62 (2006.01); B01D 69/10 (2006.01); B01D 69/12 (2006.01); B01D 71/02 (2006.01); B01J 20/18 (2006.01); B01J 20/28 (2006.01)
CPC B01J 20/18 (2013.01) [B01D 53/04 (2013.01); B01D 53/62 (2013.01); B01D 69/108 (2022.08); B01D 69/1213 (2022.08); B01D 69/1218 (2022.08); B01D 71/0215 (2022.08); B01J 20/28033 (2013.01); B01D 2253/108 (2013.01); B01D 2257/504 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A gas separation method of separating a mixed gas, the gas separation method comprising:
a) preparing a zeolite membrane complex that includes a porous support and a zeolite membrane formed on said support; and
b) supplying a mixed gas that includes a high permeability gas and a trace gas to said zeolite membrane complex, the trace gas being lower in concentration than said high permeability gas, and permeating said high permeability gas through said zeolite membrane complex to separate said high permeability gas from other gases,
wherein said trace gas contains an organic substance whose molar concentration in said mixed gas is higher than or equal to 1.0 mol %, and
an adsorption equilibrium constant of said organic substance on said zeolite membrane is less than 150 times an adsorption equilibrium constant of said high permeability gas on said zeolite membrane.