| This paper discussed a recent study of mercury removal by gaseous hydrogen chloride over novel Ce doped low vanadium V2O5-WO3/TiO2 catalysts under a bench scale condition. The performances on Hg0 removal over the catalyst were tested in simulated flue gas with 80-100μg·m-3Hg0, 8% O2, 10×10-6 HCl, 8% H2O, 800×10-6SO2 and balanced with N2. Results showed that about 95% of Hg0 could be removed. According to the characterization results, BET surface areas had not significant influence on catalytic performance. XPS results indicated that Ce4+oxide was a mainly form in the catalysts surface, which was beneficial for Hg0 removal reactions. Water vapor slightly inhibited Hg0 removal efficiency, due to the competitive adsorption, however, SO2 promoted the oxidation reactions, resulting in higher removal efficiencies. |
