Using ionic liquids
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United States of America Patent
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May 10, 2011
Grant Date -
Sep 17, 2009
app pub date -
Mar 17, 2008
filing date -
Mar 17, 2008
priority date (Note) -
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Abstract
Carbon dioxide or other gases can be separated from gas streams using ionic liquid, such as in an electrochemical cell. For example, a membrane can contain sufficient ionic liquid to reduce ionic current density of at least one of protons and hydroxyl ions, relative to carbon-containing ionic current density. A gas stream containing carbon dioxide can be introduced on a cathode side, while a source of hydrogen gas can be introduced on the anode side of the membrane. Operation of an electrochemical cell with such a membrane can separate the carbon dioxide from the gas stream and provide it at a separate outlet.
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