| abstract |
An apparatus and a process for removing CO₂ from a combustion exhaust gas, which comprises effecting a counterflow contact of the aqueous alkanolamine solution with the combustion exhaust gasto attain removal of CO₂ from said gas and effecting a further contact of either (1) the condensate waterformed by causing condensation of the gas having been subjected to the removal of CO₂ or (2) the condensate water formed by causing condensation of the combustion exhaust gas originated from the combustion of the fuel with the combustion exhaust gas, as the first and the second aspect of the invention; an apparatus for removing CO₂ from a combustion exhaust gas, which comprises a first contact means disposed in said exhaust line for effecting a counterflow contact of the aqueous alkanolamine solution with the combustion exhaust gas and a second contact means disposed downstream of said first contact means in said exhaust line for effecting a counter flow contact of the reflux water from a spent absorbent liquor regenerating tower with said gas having been subjected to the removal of CO₂, as the third aspect; and a process for removing CO₂ using an apparatus of the above aspect, which comprises adjusting the temperature of the aqueous alkanolamine solution to be supplied to said CO₂-removing means, in such a manner that the temperature of the gas at the entrance of the CO₂-removing means and that at the exit of the CO₂-removing means become the same, as the fourth aspect. |