Title: Cooperative chemical adsorption of acid gases in functionalized metal-organic frameworks

Abstract

A system and method for acid gas separations using porous frameworks of metal atoms coordinatively bound to polytopic linkers that are functionalized with basic nitrogen ligands that expose nitrogen atoms to the pore volumes forming adsorption sites. Adjacent basic nitrogen ligands on the metal-organic framework can form an ammonium from one ligand and a carbamate from the other. The formation of one ammonium carbamate pair influences the formation of ammonium carbamate on adjacent adsorption sites. Adsorption of acid gas at the adsorption sites form covalently linked aggregates of more than one ammonium carbamate ion pair. The acid gas adsorption isotherm can be tuned to match the step position with the partial pressure of acid gas in the gas mixture stream through manipulation of the metal-ligand bond strength by selection of the ligand, metal and polytopic linker materials.

Inventors:

Long, Jeffrey R.; McDonald, Thomas M.

Issue Date:

2020-07-28

Research Org.:

Univ. of California, Oakland, CA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1735065

Patent Number(s):

10722863

Application Number:

15/297,114

Assignee:

The Regents of the University of California (Oakland, CA)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D2253/204 - Metal organic frameworks
B01D2257/504 - Carbon dioxide
B01D2258/0283 - Flue gases
B01D53/02 - by adsorption, e.g. preparative gas chromatography {
B01D53/40 - Acidic components
B01D53/62 - Carbon oxides

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J20/226 - {Coordination polymers, e.g. metal-organic frameworks [MOF], zeolitic imidazolate frameworks [ZIF]
B01J20/28057 - {Surface area, e.g. B.E.T specific surface area}
B01J20/3085 - {Chemical treatments not covered by groups B01J20/3007 - B01J20/3078}
B01J20/3425 - {of sorbents or filter aids comprising organic materials}
B01J20/3483 - {by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling}

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DOE Contract Number:  

AR0000103; AR0000402; SC0001015

Resource Type:

Patent

Resource Relation:

Patent File Date: 10/18/2016

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE