A regenerable Fe/AC desulfurizer for SO_2 adsorption at low temperatures

摘要

A novel regenerable Fe/activated coke (AC)desulfurizer prepared by impregnation of Fe(NO_3)_3 on an activated coke was investigated.Experiment results showed that at 200 deg C the SO_2 adsorption capacity of the Fe/AC was higher than that of AC or Fe_2O_3.Temperature-programmed desorption (TPD)revealed that H_2SO_4 and Fe_2(SO_4)_3 were generated on the desulfurizer upon adsorption of SO_2.Effect of desulfuriation temperature was also investigated which revealed that with increasing temperature from 150 to 250 deg C,the SO_2 removal ability gradually increases.The used fe/AC can be regenerated by NH_3 at 350 deg C to directly form solid ammonium-sulfate salts.