Carbon dioxide membrane filter with graphene crown pores
AssigneeInternational Business Machines Corporation
InventorsBinquan Luan, Bruce Gordon Elmegreen
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Abstract
A structure and method for carbon capture, e.g., in flue gas. An oxygen-terminated crown pore in graphene can be provided. Exposed carbon atoms on the pore edge can be bonded with oxygen to make a crown pore. When the CO2 is inside the pore, the electrostatic interaction becomes attractive because the positively charged carbon atom in CO2 is now exposed to negatively charged oxygen atoms on the crown pore edge. A favorable interaction between CO2 and the crown pore can be expected.
Claims20
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.
A carbon dioxide membrane filter comprising a graphene sheet of carbon in a repeated hexagonal pattern, interspersed with holes that have edge carbon atoms bonded with another element other than carbon, wherein each of the holes makes up a crown pore, wherein out of 18 carbon atoms that form a ring pattern, six carbon atoms are replaced with atoms of said another element to form the crown pore having a size of about 0.05 square nanometers, wherein the graphene sheet is shaped to a cylindrical structure having a zig-zag surface pattern with the crown pores, wherein carbon dioxide is permitted to enter, via the crown pores, from a first side of the cylindrical structure to a second side of the cylindrical structure, wherein the first side and the second side have different pressures.
Dependencies are inferred from the claim text.