Selective uptake of gaseous sulfur trioxide and mercury in ZnO-CuS composite at elevated temperatures from SO2-rich flue gas

Gaseous SO3 and mercury in the SO2-rich gas have aroused the complexity of multi-pollutants formation and are difficult for disposal. We here proposed a dry-flue gas purification method to capture these two pollutants above the SO3 boiling points (>180 °C), cutting off the downstream transformation. The selective uptake of SO3 and Hg0 at a high temperature from SO2-rich conditions is a challenge. The alkaline sorbent and chalcogen-based active...