Importance

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Abstract

An object of the present invention is to provide a method and a device, which can suppress poisoning due to CO and efficiently remove a low concentration of amines contained in a gas discharged from a CO₂ recovery device that uses various absorbing liquids of CO₂ even at low temperature. A discharged gas treatment method for removing amines as absorbent contained in a gas discharged from a CO₂ removal device, in which the CO₂ removal device has used the amines, the method comprising alternatively performing the step of passing the discharged gas through a catalyst-packed bed which is packed with a catalyst composed of titanium oxide and an oxide of vanadium (V) or titanium oxide, an oxide of vanadium and an oxide of molybdenum (Mo) or tungsten (W), to adsorb and remove the amines contained in the discharged gas; and the step of passing heated air through the catalyst-packed bed wherein the amines are adsorbed thereon to heat the catalyst, and at the same time performing elimination and oxidative decomposition of the adsorbed amines.

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First Claim