On the liquid phase chemistry in pressurized flue gas cleaning systems: the effect of process design parameters

摘要

A rate-based model is developed in order to study the chemistry of importance for the simultaneous absorption of NO_x and SO_x under pressurized conditions applicable to oxy-fuel and chemical looping combustion systems. The kinetics of the reactions implemented in the model is based on a thorough literature review. The chemistry of nitrogen, sulfur and N-S interactions are evaluated in detail and the most important reaction paths are discussed. The effect of pH, pressure and flue-gas composition on the liquid phase chemistry is also examined and discussed. It is concluded that the pH level plays a significant role on the mechanism and the products that are formed in the liquid phase. In addition, pressure and presence of NO_x significantly affect the removal of SO_2 from flue gas.