REDUCTION METHOD OF CO2 IN EXHAUST GAS AND IN ATMOSPHERE

PROBLEM TO BE SOLVED: To provide a reduction method of COin exhaust gas and in the atmosphere that removes COdischarged from a thermal power plant, an incinerator or an automobile discharging COas the cause of environmental pollution, removes COby using an amine compound as an absorbent of discharged COand catalytically reacting COwith the amine compound, further removes COalready discharged into the atmosphere by placing beads coated with an absorbent on a road or in a tunnel and, further achieves effective use of adsorbent which has adsorbed CO.SOLUTION: In the reduction method of COin exhaust gas and in the atmosphere, the amine compound is formed into a bead shape or a bead shaped material is coated with the amine compound and is contacted with gas containing CO, thereby the COin the gas is absorbed and removed. Because the amine compound as the absorbent of discharged COhas a bead shape, the gas passes well, thereby, the contacting possibility between the COand the amine compound is high and, as a result, the reaction removal of the COis satisfactorily performed. The amine compound which has absorbed COcan be eluted by an alkali solution, further, the eluted liquid which becomes alkaline is neutralized with an acidic phosphoric acid solution and, thereby, the amine compound neutralized with the acidic phosphoric acid solution can be utilized as a fertilizer.