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US 12,447,436 B2Granted
CO2 utilization for co production via fuel cell enabled by CO2-selective membrane
AssigneeOhio State Innovation Foundation
InventorsW. S. Winston Ho, Yang Han
Life of this patent
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Abstract
Provided herein are CO2-selective membranes that can be used to efficiently separate CO2 and CO. The membranes can be used to produce high-purity CO2 and CO gas streams from a feed gas stream comprising a mixture of CO2 and CO (e.g., an exhaust gas stream from a fuel cell, such as a solid oxide fuel cell). In this way, the membranes can be used with a solid oxide fuel cell system to covert CO2 to CO.
Claims15
A CO2-selective membrane for the separation of CO2 and CO, the membrane comprising:
- a support layer;
- and
- a selective polymer layer disposed on the support layer, the selective polymer layer comprising a hydrophilic polymer matrix and an amine-containing carrier dispersed therein, wherein the amine-containing carrier comprises an amine-containing mobile carrier;
- and
- wherein the CO2-selective membrane exhibits a CO2:
- CO selectivity of at least 500 at 100° C. and 2 atm feed pressure;
- and
- wherein the amine-containing mobile carrier comprises a salt formed by reaction of an amine or a base with an amino acid,
- wherein the amine is selected from a group consisting of piperazine, 2-(1-piperazinyl) ethylamine, ethylenediamine, diethylenetriamine, triethylenetetramine, tetramethylguanidine, and blends thereof,
- wherein the base is selected from a group consisting of KOH, NaOH, LiOH, CsOH, NH4OH, and blends thereof;
- and
- wherein the amino acid is selected from a group consisting of sarcosine, glycine, proline, lysine, arginine, histidine, aspartic acid, glutamic acid, serine, threonine, asparagine, glutamine, cysteine, selenocysteine, alanine, valine, isoleucine, leucine, methionine, phenylalanine, tyrosine, tryptophan, pipecolinic acid, N,N-dimethylglycine, and blends thereof.
9 more elements
Dependencies are inferred from the claim text.