Membranes for fluid separation
AssigneeOhio State Innovation Foundation
InventorsPrabir Kumar Dutta, Yanzuo Li, Bo Wang
Life of this patent
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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 and a continuous phase comprising a selective inorganic material disposed within the gas permeable support. In some embodiments, the membranes can exhibit a CO2:N2 selectivity of at least 10 at 24° C. The membranes can be bendable, such that when the membranes are wrapped around a 1.5-inch diameter cylinder and returned to a planar conformation, the CO2:N2 selectivity of the membranes is at least 25% of the CO2:N2 selectivity of the membranes prior to having been wrapped around the cylinder.
Claims23
A method of making alumino-silicate nanoparticles comprising:
- (a) heating a first mixture comprising a silicon source, an aluminum source, a base, an organic agent, and a first solvent to produce a first population of alumino-silicate nanoparticles dispersed in a first supernatant;
- (b) separating the first population of inorganic nanoparticles from the first supernatant;
- (c) adding a base to the first supernatant to form a second mixture;
- (d) heating the second mixture to produce a second population of alumino-silicate nanoparticles dispersed in a second supernatant;
- and
- (e) separating the second population of inorganic nanoparticles from the second supernatant;
- wherein the method comprises repeating steps (c) and (d) prior to performing step (e);
- and
- wherein the first population of alumino-silicate nanoparticles and the second population of alumino-silicate nanoparticles each have an average particle size of 100 nm or less.
A method of making alumino-silicate nanoparticles comprising:
- (a) heating a first mixture comprising a silicon source, an aluminum source, a base, an organic agent, and a first solvent to produce a first population of alumino-silicate nanoparticles dispersed in a first supernatant;
- (b) separating the first population of inorganic nanoparticles from the first supernatant;
- (c) adding a base to the first supernatant to form a second mixture;
- (d) heating the second mixture to produce a second population of alumino-silicate nanoparticles dispersed in a second supernatant;
- and
- (e) separating the second population of inorganic nanoparticles from the second supernatant;
- wherein step (d) further comprises concentrating the second supernatant to form a concentrated supernatant, and diluting the concentrated supernatant the reform the second supernatant;
- and
- wherein the first population of alumino-silicate nanoparticles and the second population of alumino-silicate nanoparticles each have an average particle size of 100 nm or less.
A method of making alumino-silicate nanoparticles comprising:
- (a) heating a first mixture comprising a silicon source, an aluminum source, a base, an organic agent, and a first solvent to produce a first population of alumino-silicate nanoparticles dispersed in a first supernatant;
- (b) separating the first population of inorganic nanoparticles from the first supernatant;
- (c) adding a base to the first supernatant to form a second mixture;
- (d) heating the second mixture to produce a second population of alumino-silicate nanoparticles dispersed in a second supernatant;
- and
- (e) separating the second population of inorganic nanoparticles from the second supernatant;
- wherein the alumino-silicate nanoparticles comprise zeolites having a faujasite structure;
- and
- wherein the first population of alumino-silicate nanoparticles and the second population of alumino-silicate nanoparticles each have an average particle size of 100 nm or less.
Dependencies are inferred from the claim text.