Preparation of adsorbent made from surplus sludge and its desulfurization mechanism

Adsorbent for flue gas desulfurization was prepared from surplus sludge of sewage,and its capacities were studied. The isothermal adsorption equation of system of SO2-O2-H2O(g)-N2 was found, and its adsorption mechanism was inferred. Results indicated that the desulfurization performance of the adsorbent made by modification method from surplus sludge of sewage was better. The adsorption process can be described by Freundlich Model. The synergistic action of the complex oxides accelerated the chemical adsorption for SO2.