Configurations and methods of carbon capture
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United States of America Patent
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Issued Date -
Nov 23, 2006
app pub date -
Apr 2, 2004
filing date -
Apr 3, 2003
priority date (Note) -
Abandoned
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Abstract
An IGCC plant has a precombustion decarbonization unit in which acid gas is removed from a combustion gas before the combustion gas enters a combustion turbine. In one preferred configuration, a sulfur removal unit removes hydrogen sulfide from a feed gas before the desulfurized feed gas enters an autorefrigeration unit in which carbon dioxide is removed. In another preferred configuration, hydrogen sulfide is converted to carbonyl sulfide in a dryer, and the carbonyl sulfide is absorbed in the liquid carbon dioxide that is prepared from the feed gas using autorefrigeration.
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