Process for removing carbon dioxide from combustion gases
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United States of America Patent
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Feb 10, 2004
Issued Date -
N/A
app pub date -
Feb 20, 1996
filing date -
Sep 16, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for removing CO.sub.2 from a combustion gas which comprises bringing a combustion gas containing oxygen and CO.sub.2 and a CO.sub.2 absorbent solution into contact at the atmospheric pressure, thereby allowing the CO.sub.2 absorbent solution to absorb CO.sub.2 from the combustion gas, and, in the ensuing step, heating the absorbent solution that has absorbed CO.sub.2 to liberate CO.sub.2 and regenerate the CO.sub.2 absorbent solution, and circulating the regenerated solution for reuse. An aqueous solution of a hindered amine selected from the group consisting of 2-amino-2-methyl-1-propanol (AMP), 2-(ethylamino)-ethanol (EAE), 2-(methylamino)-ethanol (MAE), and 2-(diethylamino)-ethanol (DEAE) is used as the CO.sub.2 absorbent solution, and carbon steel is used in building the members of the equipment that contact the aqueous hindered amine solution. The absorbent solution contains cupric carbonate which is a corrosion inhibitor.
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