Mercury removal performance over a Ce-doped V-W/TiO_(2) catalyst in an internally illuminated honeycomb photoreactor  

作　　者：GAO Tian ZHANG YiLi QIU YaQin XIONG Zhuo YANG JianPing ZHAO YongChun ZHANG JunYing 

机构地区：[1]State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China [2]School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China [3]School of Energy Science and Engineering,Central South University,Changsha 410083,China

出　　处：《Science China(Technological Sciences)》2021年第11期2441-2452,共12页中国科学（技术科学英文版）

基　　金：supported by the National Key Technologies R&D Program(Grant No.2019YFC1907000);the National Natural Science Foundation of China(Grant No.42030807);the Key Research and Development Program of Hubei Province(Grant No.2020BCA076);the Program for HUST Academic Frontier Youth Team(Grant No.2018QYTD05)。

摘　　要：A new type of internally illuminated honeycomb photoreactor was designed. The honeycomb catalyst prepared by using Cedoped TiO2 with 1%–2% vanadium and tungsten was employed for mercury removal from simulated industrial flue gas. The adsorption kinetics in the reaction process were studied. The results showed that the internally illuminated honeycomb photoreactor had good mercury removal performance. When the temperature was 25℃ and the ultraviolet(UV) light intensity reached 80 μW/cm2, the mercury removal efficiency reached 92.5%. The mercury removal efficiency increased significantly with the doping ratio of Ce. XPS analysis showed that the oxidation state of Ce changed from 4 to 3 in the mercury removal reaction and produced lattice oxygen, which acts as an oxidant. O2 can promote mercury removal by honeycomb catalysts;SO2 and HCl also had positive effects, while NO had an inhibitory effect on mercury removal. Kinetic research in the reaction process showed that the quasi-first-order dynamic model had good fitting results, and the correlation coefficients of the fitting results for multiple sets of experimental data were more than 0.999.

关 键 词：mercury removal Ce-doped V-W/TiO2 catalyst internally illuminated honeycomb photoreactor flue gas 

分 类 号：X51[环境科学与工程—环境工程] TQ426[化学工程]