| Abstrakt: |
Simultaneous NO reduction (NOred) and Hg0oxidation (Hg0oxi) in the exhaust gas of a coal-fired power plant were studied by using V2O5-WO3/TiO2. The increase in vanadia contents and temperature concurrently increased NOredand Hg0oxi. However, the increase in NH3increased NOredbut decreased Hg0oxiand the increase in HCl increased Hg0oxi. At 350 °C, when the vanadia content and HCl and NH3concentrations were less than 2.5%, 40 ppm, and 400 ppm, respectively, rate constants of Hg0oxiand NOredwere between 2031 to 23,655 and 131 to 737 m3·mol–1·s–1, respectively. NOredand Hg0oxirate constants were increased by the increase in vanadia contents, although the NOredrate constants were similar at 2.0 and 2.5% vanadia contents due to the surface saturation. Using 2.0% vanadia contents with a minimum HCl concentration of 10 ppm, more than 85% NO and Hg0can be removed under simulated flue gas conditions. |
