Composite membranes for separation of gases
AssigneeOhio State Innovation Foundation
InventorsW. S. Winston Ho, Prabir Dutta, Kartik Ramasubramanian, Michael Severance
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Abstract
Membranes, methods of making the membranes, and methods of using the membranes are described herein. The membranes can comprise a gas permeable support layer, an inorganic layer disposed on the support, the inorganic layer comprising a plurality of discreet nanoparticles having an average particle size of less than 1 micron, and a selective polymer layer disposed on the inorganic layer, the selective polymer layer comprising a selective polymer having a CO2:N2 selectivity of at least 10 at 57° C. In some embodiments, the membrane can be selectively permeable to an acidic gas. The membranes can be used, for example, to separate gaseous mixtures, such as flue gas.
Claims19
A membrane comprising:
- a gas permeable support layer comprising a gas permeable polymer disposed on a base,
- an inorganic layer disposed on the gas permeable support layer, the inorganic layer comprising a plurality of discreet nanoparticles having an average particle size of less than 1 micron, and
- a selective polymer layer disposed on the inorganic layer, the selective polymer layer comprising a selective polymer having a CO2:N2 selectivity of at least 10 at 57° C.
A method of making a membrane comprising,
- depositing a nanoparticle dispersion on a gas permeable support layer comprising a gas permeable polymer disposed on a base to form an inorganic layer disposed on the gas permeable support layer, wherein the nanoparticle dispersion comprises a plurality of discreet nanoparticles having an average particle size of less than 1 micron;
- and
- coating the inorganic layer with a selective polymer, wherein the selective polymer exhibits a CO2:N2 selectivity of at least 10 at 57° C.
A membrane comprising:
- a gas permeable support layer,
- an inorganic layer disposed on the gas permeable support layer, the inorganic layer comprising a plurality of discreet nanoparticles having an average particle size of less than 1 micron, and
- a selective polymer layer disposed on the inorganic layer, the selective polymer layer comprising a selective polymer having a CO2:N2 selectivity of from 10 to 500 at 57° C.
Dependencies are inferred from the claim text.