US 11,857,915 B2
Gas separation method and gas separator
Kenichi Noda, Nagoya (JP); Kenji Yajima, Nagoya (JP); and Katsuya Shimizu, Kasugai (JP)
Assigned to NGK INSULATORS, LTD., Nagoya (JP)
Filed by NGK INSULATORS, LTD., Nagoya (JP)
Filed on Mar. 17, 2021, as Appl. No. 17/203,987.
Application 17/203,987 is a continuation of application No. PCT/JP2019/036386, filed on Sep. 17, 2019.
Claims priority of application No. PCT/JP2018/037186 (WO), filed on Oct. 4, 2018.
Prior Publication US 2021/0197118 A1, Jul. 1, 2021
Int. Cl. B01D 53/22 (2006.01); B01D 71/02 (2006.01)
CPC B01D 53/228 (2013.01) [B01D 71/024 (2013.01); B01D 2053/222 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A gas separation method of separating carbon dioxide in a mixed gas, comprising:
a) preparing a separation membrane complex in which a separation membrane with pores having a mean pore diameter less than or equal to 1 nm is formed on a porous support; and
b) supplying a mixed gas that includes carbon dioxide and another gas from a side of said separation membrane to said separation membrane complex and obtaining a permeated gas by causing the carbon dioxide in said mixed gas to permeate through said separation membrane and said support,
wherein said operation b) is performed by feeding said mixed gas to said separation membrane in a state in which at least part of a permeation surface of said support, from which said permeated gas is exhausted has a temperature lower by 10° C. or more than a temperature of said mixed gas before being supplied to said separation membrane complex.