Method of obtaining carbon dioxide from carbon dioxide-containing gas mixture
First Claim
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1. A method of obtaining carbon dioxide from a CO2-containing gas mixture, said method comprising the steps of:
- obtaining a CO2-containing gas mixture;
cooling the gas mixture to a temperature from 5°
C. to about −
60°
C.;
flowing the cooled gas mixture into a gas separation membrane module made of a polymeric material to produce a carbon dioxide-rich stream and a carbon dioxide-lean stream, wherein the polymeric material has a CO2 solubility at 35°
C. and 10 bar pressure of >
0.03 [(cm3 of CO2 at STP)/(cm3 of polymeric material)(cmHg)] and a glass transition temperature of >
210°
C.;
compressing the carbon dioxide-rich stream;
at least partially condensing the compressed carbon dioxide-rich stream through cooling;
subjecting the cooled, compressed carbon dioxide-rich stream to cryogenic phase separation to produce a CO2 rich liquid and a CO2 lean vapor stream; and
combining the CO2 lean vapor stream with the CO2-containing gas mixture.
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Abstract
Disclosed are methods of obtaining carbon dioxide from a CO2-containing gas mixture. The methods combine the benefits of gas membrane separation with cryogenic temperatures.
38 Citations
45 Claims
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1. A method of obtaining carbon dioxide from a CO2-containing gas mixture, said method comprising the steps of:
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obtaining a CO2-containing gas mixture; cooling the gas mixture to a temperature from 5°
C. to about −
60°
C.;flowing the cooled gas mixture into a gas separation membrane module made of a polymeric material to produce a carbon dioxide-rich stream and a carbon dioxide-lean stream, wherein the polymeric material has a CO2 solubility at 35°
C. and 10 bar pressure of >
0.03 [(cm3 of CO2 at STP)/(cm3 of polymeric material)(cmHg)] and a glass transition temperature of >
210°
C.;compressing the carbon dioxide-rich stream; at least partially condensing the compressed carbon dioxide-rich stream through cooling; subjecting the cooled, compressed carbon dioxide-rich stream to cryogenic phase separation to produce a CO2 rich liquid and a CO2 lean vapor stream; and combining the CO2 lean vapor stream with the CO2-containing gas mixture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 29, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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25. A method of obtaining carbon dioxide from a CO2-containing gas mixture, said method comprising the steps of:
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obtaining a CO2-containing gas mixture; cooling the gas mixture; flowing the cooled gas mixture into a gas separation membrane module made of a polymeric material to produce a carbon dioxide-rich stream and a carbon dioxide-lean stream, wherein the polymeric material has a CO2 solubility at 35°
C. and 10 bar pressure of >
0.03 [(cm3 of CO2 at STP)/(cm3 of polymeric material)(cmHg)] and a glass transition temperature of >
210°
C.;compressing the carbon dioxide-rich stream; at least partially condensing the compressed carbon dioxide-rich stream through cooling; and subjecting the cooled, compressed carbon dioxide-rich stream to cryogenic phase separation to produce a CO2 rich liquid and a CO2 lean vapor stream, wherein the polymeric material is a polysulfone having repeating units of formula (II) - View Dependent Claims (26, 27, 28)
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30. A method of obtaining carbon dioxide from a CO2-containing gas mixture, said method comprising the steps of:
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obtaining a CO2-containing gas mixture; cooling the gas mixture; flowing the cooled gas mixture into a gas separation membrane module made of a polymeric material to produce a carbon dioxide-rich stream and a carbon dioxide-lean stream, wherein the polymeric material has a CO2 solubility at 35°
C. and 10 bar pressure of >
0.03 [(cm3 of CO2 at STP)/(cm3 of polymeric material)(cmHg)] and a glass transition temperature of >
210°
C.;compressing the carbon dioxide-rich stream; at least partially condensing the compressed carbon dioxide-rich stream through cooling; and subjecting the cooled, compressed carbon dioxide-rich stream to cryogenic phase separation to produce a CO2 rich liquid and a CO2 lean vapor stream, wherein the polymeric material is a poly (fluorocarbonate) selected from the group consisting of poly (tetrachlorohexafluorocarbonate) and poly (tetrabromohexafluorocarbonate).
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31. A method of obtaining carbon dioxide from a CO2-containing gas mixture, said method comprising the steps of:
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obtaining a CO2-containing gas mixture; cooling the gas mixture; flowing the cooled gas mixture into a gas separation membrane module made of a polymeric material to produce a carbon dioxide-rich stream and a carbon dioxide-lean stream, wherein the polymeric material has a CO2 solubility at 35°
C. and 10 bar pressure of >
0.03 [(cm3 of CO2 at STP)/(cm3 of polymeric material)(cmHg)] and a glass transition temperature of >
210°
C.;compressing the carbon dioxide-rich stream; at least partially condensing the compressed carbon dioxide-rich stream through cooling; and subjecting the cooled, compressed carbon dioxide-rich stream to cryogenic phase separation to produce a CO2 rich liquid and a CO2 lean vapor stream, wherein the polymeric material is a condensation polymer of 2,2,2-trifluoroacetophenone with biphenyl ether, terphenyl ether or both biphenyl ether and terphenyl ether.
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33. A method of obtaining carbon dioxide from a CO2-containing gas mixture, said method comprising the steps of:
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obtaining a CO2-containing gas mixture; cooling the gas mixture; flowing the cooled gas mixture into a gas separation membrane module made of a polymeric material to produce a carbon dioxide-rich stream and a carbon dioxide-lean stream, wherein the polymeric material has a CO2 solubility at 35°
C. and 10 bar pressure of >
0.03 [(cm3 of CO2 at STP)/(cm3 of polymeric material)(cmHg)] and a glass transition temperature of >
210°
C.;compressing the carbon dioxide-rich stream; at least partially condensing the compressed carbon dioxide-rich stream through cooling; and subjecting the cooled, compressed carbon dioxide-rich stream to cryogenic phase separation to produce a CO2 rich liquid and a CO2 lean vapor stream, wherein the gas mixture is cooled to a temperature from about −
20°
C. to about −
50°
C.
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Specification