	US 11,904,282 B2
	Method of controlling structure of defects in chabazite zeolite membranes through low temperature heat treatment
Jungkyu Choi, Seoul (KR); Kwan Young Lee, Seoul (KR); and Minseong Lee, Seoul (KR)
Assigned to Korea University Research and Business Foundation, Seoul (KR)
Filed by KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION, Seoul (KR)
Filed on Jan. 15, 2021, as Appl. No. 17/149,823.
Claims priority of application No. 10-2020-0005590 (KR), filed on Jan. 15, 2020.
Prior Publication US 2021/0213393 A1, Jul. 15, 2021
Int. Cl. B01D 67/00 (2006.01); B01D 53/22 (2006.01); C02F 1/44 (2023.01); C01B 39/02 (2006.01); C01B 39/48 (2006.01); B01J 20/18 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); C10L 3/10 (2006.01); B01D 69/10 (2006.01); B01D 71/02 (2006.01); C02F 101/34 (2006.01)

CPC B01D 67/0083 (2013.01) [B01D 53/228 (2013.01); B01D 67/0051 (2013.01); B01D 67/0095 (2013.01); B01D 69/107 (2022.08); B01D 69/108 (2022.08); B01D 71/0281 (2022.08); B01J 20/183 (2013.01); B01J 20/28033 (2013.01); B01J 20/3057 (2013.01); B01J 20/3078 (2013.01); C01B 39/026 (2013.01); C01B 39/48 (2013.01); C02F 1/44 (2013.01); C10L 3/104 (2013.01); C10L 3/105 (2013.01); C02F 2101/34 (2013.01); C10L 2290/548 (2013.01)]

3 Claims

1. A method of separating CO₂from a mixture gas comprising:

flowing the mixture gas through a CHA zeolite membrane;

separating the CO₂from the mixture gas; and

collecting the separated CO₂,

wherein the mixture gas comprises CO₂and a molecule selected from the group consisting of CH₄, CO, SO₂, N₂, O₂, C₂H₄, C₂H₆, C₃H₆and C₃H₈,

wherein the CHA zeolite membrane is prepared by a method comprising calcining the CHA zeolite membrane under an ozone atmosphere at a temperature of 150 to 300° C., and

wherein the mixture gas is flue gas, synthesis gas, or exhaust gas, which comprises moisture.