EXPERIMENTAL STUDIES ON SELECTIVE ADSORPTION BY ACTIVATED CARBON FOR SO2 AND NO EN THE FLUE GAS

Experimental study on eliminating SO 2 and NO in the flue gas by using activated carbon has been systematically carried out, including particle size of the activated carbon, its activated methods, concentration of NO in the flue gas, as well as the influence of soaking the activated carbon in HNO 3 upon the adsorption ability of activated carbon for SO 2 and NO in the flue gas, etc.. The results of experimental study show, (1) the adsorption of activated carbon for SO 2 and NO in the flue gas has certain selectivity; (2) the NO ab sorbed physically being substituted and desorbed, the NO absorbed chemically can promote the adsorption ability of activated carbon for SO 2; (3) the smaller the particle size and the larger the specific surface area of activated carbon are, the longer the tune required to penetrate the bed layer; (4) under the test condition, the desulphuation efficiency of activated carbon reaches 99%; (5) the activated carbon soaked in HNO 3 with suitable concentration can enhance the ability of activated carbon to absorb SO 2.