摘要
选择氮掺杂纳米TiO2作为光催化剂,CuO,Al2O3,V2O5作为普通催化剂,对比研究提高SO3生产效益的实验条件。结果表明:普通催化剂对SO2的吸附平衡时间和催化氧化生成SO3的反应时间均为20 min;有氧气存在时普通催化剂对SO2的吸附效果为V2O5>Al2O3>CuO;温度对V2O5吸附SO2效果影响较大,实验条件下440℃为最佳温度;氮掺杂纳米TiO2光催化剂最佳制备条件为500℃焙烧3 h,且采用普通荧光灯照射就会产生催化效果;有氧气存在时增加SO2的体积流量,提高吸收液的pH值,增加光照强度可以提高SO3生成量。实验结果为燃煤、石油脱硫,纳米材料的研究和硫酸生产等化工行业选择催化剂提供借鉴和参考。
The experimental conditions of improving production efficiency of SO3 were studied by selecting N-doped TiO2as photocatalyst and CuO, Al2O3 and V2O5 as common catalysts. The results showed that： the adsorption equilibri- um time of SO2 by general catalysts and the catalytic oxidation time of SO2 to SO3 were both 20 rain; with oxygen exist- ing, conventional catalysts＇adsorption effect to SO2 was V2O5 〉 Al2O3 〉 CuO; temperature had a great influence on the adsorption of SO2 by V2O5 and the optimum temperature was 440 ℃ in the experimental conditions. N-doped nano- TiO2 can be prepared under the 500 ℃for calcinating 3 h and can produce catalytic effect by using the ordinary fluores- cent lamp; In the presence of oxygen, increasing the volume flow of SO2 , improving the pH value of absorption liquid, enhancing the light intensity can increase the generation amount of SO3. The results provide reference to catalyst＇ s se- lection for the desulfurization of coal or oil, the research of nano-materials and the production of sulfuric acid and other chemical industry.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2013年第3期101-106,共6页
Journal of North China Electric Power University：Natural Science Edition
基金
河北省教育厅指导性计划项目资助(Z2012022)
