Polymeric amine sorbents for gas separation using a moisture swing regeneration step
OwnerOmid GHAFFARI-NIK, Yan GAO +1inventors
InventorsOmid GHAFFARI-NIK, Yan GAO, Joel CIZERON
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Abstract
Polymeric amine solid sorbents with enhanced stability to moisture and/or oxygen for sorptive gas separation processes are disclosed. The polymeric amine solid sorbents can be supported on a porous support or integrated into solid porous polymer networks. Sorptive gas separators can employ contactors with such polymeric amine solid sorbents for separation of a component from a multi-component gas stream.
Claims54
A solid sorbent comprising:
- a polymeric amine having an average molecular weight greater than 2000 Dalton,
- wherein said solid sorbent is insoluble in water, and forms a porous network, and
- wherein said solid sorbent is in the form of particles or a film or a sheet.
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A solid sorbent comprising:
- a polymeric amine formed into a porous solid characterized by:
- (a) a CO2 equilibrium capacity, wherein said solid sorbent has a CO2 equilibrium capacity to heat capacity ratio of between 15 to 40 cc stp CO2/(J/K) per unit heat capacity of said solid sorbent, wherein said equilibrium capacity is measured at 50° C. under 15% CO2 feed mixture;
- (b) a kinetic adsorption rate, wherein said kinetic adsorption rate is greater than 0.03 mmol/g/s when in contact with a CO2 mixture, wherein said CO2 mixture comprise 15% CO2 and a temperature between 30° C. and 50° C.;
- (c) a heat of adsorption for CO2, wherein said heat of adsorption for CO2 is between 70 and 120 kj/mol of CO2 adsorbed.
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A sorptive gas contactor comprising:
- a plurality of sorbent sheets, each of the plurality of sorbent sheets comprising a solid sorbent, each of said sorbent sheets having a thickness in a thickness range of 0.1 mm to 3 mm, and positioned to form passages between said plurality of sorbent sheets to enable flow of a gas stream between and in contact with said sorbent sheets, and
- wherein said solid sorbent sheets have a density in a range of 0.2 g/cm3 to 0.8 g/cm3, and comprise a polymeric amine polymer with greater than 5 weight % of nitrogen from a primary or a secondary amine functional group, said polymeric amine formed as a co-polymer from a vinyl amine monomer having a molecular weight less than 100 Dalton and a divinyl monomer having a molecular weight greater than 100 Dalton, or formed from a reaction of a water-soluble polymeric amine with long chain alkyl (8 carbon or greater) groups.
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Dependencies are inferred from the claim text.