A novel additive for the reduction of acid gases and NO_x in municipal waste incinerator flue gas

摘要

The reduction of SO_2, HC1, and NO_X concentrations using calcium magnesium acetate (CMA) as a novel sorbent in a simulated municipal waste incinerator flue gas was investigated. The reduction of individual SO_2, HC1, and NO_X concentrations was tested at 850 deg C and it was found that CMA could reduce the SO_2 concentration by 74 percent, HC1 concentration by 64 percent, or NO_X concentration by 94 percent. It was observed that individual SO_2 or HC1 capture increased with increasing initial oxygen concentration in the reacting gas or increasing sorbent input. NO_X reduction decreased with increasing initial oxygen concentration in the reacting gas. The simultaneous reduction of SO_2, HC1, and NO_X concentrations by CMA was also investigated. It was found that CMA could simultaneously capture 60 percent SO_2 and 61 percent HC1 and reduce NO_X concentrations by 26 percent, when the initial oxygen concentration in the reacting gas was 4 percent. During the simultaneous reduction of SO_2, HC1, and NO_X, it was noted that as the initial oxygen concentration in the reacting gas increased, the efficiency of SO_2 capture increased too, but the efficiency of HC1 capture and the efficiency of NO_X destruction decreased.