Plasma-assisted adsorption of elemental mercury on CeO2/TiO2 at low temperatures

[摘要] Mercury is a kind of pollutants contained in flue gas which is hazardous for human beings. In this work, CeO2was packed in the discharge zone of a plasma reactor to adsorb elemental mercury at low temperatures. Plasma-catalyst reactor can remove Hg0efficiently with CeO2/TiO2catalysts packed in the discharge zone. The Hg0concentration continued to decrease gradually when the plasma was turned on, but not sank rapidly. This tendency was different with other catalysts. The treatment of plasma to CeO2/TiO2catalysts has a promotion effect on the adsorption of Hg0. Plasma has the effect of changing the surface properties of the catalysts and the changes would restitute if the condition changed. The long-running test demonstrated that this method is an effective way to remove Hg0. The removal efficiency remained at above 99% throughout 12 hours when plasma had been turned on (15kV, 0.5 g packed CeO2/TiO2).

[发布机构] School of Energy and Power Engineering, Jiangsu University, Zhenjiang; 212013, China^1;State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou; 310027, China^2

[效力级别] 生态环境科学

[关键词] Discharge zone;Elemental mercury;Low temperatures;Plasma reactors;Plasma-catalyst;Promotion effects;Removal efficiencies;Running tests