US 12,220,670 B2
Carbon dioxide membrane filter with graphene crown pores
Binquan Luan, Chappaqua, NY (US); and Bruce Gordon Elmegreen, Goldens Bridge, NY (US)
Assigned to International Business Machines Corporation, Armonk, NY (US)
Filed by International Business Machines Corporation, Armonk, NY (US)
Filed on Mar. 22, 2022, as Appl. No. 17/701,040.
Claims priority of provisional application 63/276,751, filed on Nov. 8, 2021.
Prior Publication US 2023/0145516 A1, May 11, 2023
Int. Cl. B01D 71/02 (2006.01); B01D 53/22 (2006.01); B01D 67/00 (2006.01); B01D 69/02 (2006.01); B01D 69/10 (2006.01); C01B 32/50 (2017.01)
CPC B01D 71/021 (2013.01) [B01D 53/226 (2013.01); B01D 67/0062 (2013.01); B01D 69/02 (2013.01); B01D 69/10 (2013.01); C01B 32/50 (2017.08); B01D 2325/021 (2013.01); B01D 2325/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A carbon dioxide membrane filter comprising at least one graphene sheet interspersed with holes that have edge carbon atoms bonded with another element other than carbon, each of the holes making up a crown pore, wherein out of 18 carbon atoms that form a ring pattern around the crown pore, six carbon atoms are replaced with said another element to form the crown pore having a size of about 0.05 square nanometers.