UV/TiO_2光催化氧化工艺脱汞的试验研究

UV/TiO_2光催化技术在TiO_2催化剂的作用下可将烟气中Hg~0氧化脱除。利用自制的UV/TiO_2氧化试验台研究了影响Hg~0去除率的相关因素,结果表明,在无催化剂和有紫外灯情况下可脱除少量Hg~0;Hg~0去除率随催化剂活性组分含量的增加而上升,但上升速率逐渐下降;在温度(50～200)℃范围内,Hg~0去除率无明显变化;Hg~0去除率随着Hg~0初始浓度的升高逐渐下降;Hg~0去除率随着烟气中氧含量先上升后趋于不变。UV/TiO_2氧化工艺脱汞可为燃煤电厂烟气脱汞提供理论指导。

Experimental investigation of demercuration by UV/TiO2 photocatalytic technology

UV/TiO₂ photocatalytic technology can oxidize Hg⁰ in flue gas by TiO₂ catalyst.In this paper,the related factors of Hg⁰ removal rate were studied by self-made UV/TiO₂ oxidation test bench.The results show that a small amount of Hg⁰ can be removed without catalyst and UV lamp.The removal efficiency increases with the increase of catalyst active component content.However,the rate of ascending decreases gradually.In the experimental temperature range of (50-200) ℃,the removal efficiency does not change significantly.While the removal efficiency decreases with the increase of the initial concentration of Hg⁰.The removal efficiency tends to increase to a constant with the increase of oxygen content in the flue gas.Therefore,the oxidation process can provide theoretical guidance for mercury removal from coal-fired power plants.