Experimental studies on absorption and regeneration performance of compound amine sulphone solvents on CO₂, SO₂ and NO_x capture

Multi-pollutant gas cleaning technology is a promising alternative to conventional singe-removal for the migration of gas pollutants, with its advantages of simple system, small occupied area and low investment. In this study, simultaneous removal of CO₂/SO₂/NO_x and desorption of CO₂/NO were carried out in a simultaneous absorption and separated desorption cycling system. The influences of desorption temperature and gas-liquid rate on desorption performance were investigated. The absorption/desorption performances of this system, such as the removal rate of CO₂/SO₂/NO_x, absorption amount, desorption rate of CO₂/NO desorption amount were also evaluated under various solvent concentration. Based on the experimental study, the optimum desorption temperatures of CO₂ and NO were 90℃ and 50℃, the absorption of CO₂/SO₂/NO_x and desorption of CO₂/NO were realized by the compound amine sulphone solvents, and the equilibrium absorption rate and desorption rate were independent with the solvents concentration.