Separating gas using ion exchange
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United States of America Patent
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Dec 2, 2014
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app pub date -
Dec 19, 2007
filing date -
Dec 19, 2007
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Abstract
Carbon dioxide can be separated from gas streams using ion exchange, such as in an electrochemical cell. An anion exchange membrane can be configured to increase the efficiency of the system and to permit the flow of the carbon-containing ions within the system while reducing diffusion of protons and/or hydroxyl ions. A gas stream containing carbon dioxide can be introduced to the system on the cathode side, while a source of hydrogen-containing molecules can be introduced on the anode side. Operation of the system can separate the carbon dioxide from the gas stream and provide it at a separate outlet.
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