METHOD FOR REGENERATING CARBON DIOXIDE ABSORBENT

摘要

PROBLEM TO BE SOLVED: To provide a method for regenerating a carbon dioxide absorbent by decomposing a carbonate-forming carbon dioxide absorbent chemically without high-temperature heating to gasify and thereby desorb the dioxide. SOLUTION: This method comprises treating the carbonate-forming carbon dioxide absorbent sequentially with an acid aqueous solution together with an alcohol aqueous solution or separately with the acid aqueous solution followed by the alcohol aqueous solution to decompose the carbonate chemically and remove the yielded carbon dioxide and then forming a hydroxide to regenerate the absorbent in a wet manner at a normal temperature. The method permits the treatment under a pressure of the dioxide desorbing process of equal to or lower than the atmospheric pressure. COPYRIGHT: (C)2005,JPO&NCIPI