Novel development of VO_(x)-CeO_(x)-WO_(x)/TiO_(2) catalyst for low-temperature catalytic oxidation of chloroaromatic organics  

作　　者：Yunfeng Ma Jianwen Lai Jiayao Wu Xiaoqing Lin Hong Yu Hao Zhang Angjian Wu Jisheng Long Xiaodong Li 

机构地区：[1]State Key Laboratory for Clean Energy Utilization,Institute for Thermal Power Engineering,Zhejiang University,Hangzhou,310027,China [2]Shanghai SUS ENVIRONMENT Co.,LTD,Shanghai,201703,China

出　　处：《Waste Disposal and Sustainable Energy》2022年第4期259-269,共11页废弃物处置与可持续能源（英文）

基　　金：supported by the National Key Research and Development Program of China (No.2020YFC1910100).

摘　　要：A novel selective catalytic reduction(SCR)catalyst with high catalytic activity on chloroaromatic organics at lower temperatures(160-180℃)is critical for municipal solid waste incineration(MSWI)plants.This study prepares a series of honeycomb-type VO_(x)/TiO_(2) catalysts and finally develops a new low-temperature catalyst with high catalytic activity in eliminating chloroaromatic organics.Based on the conversion efficiency(CE)of 1,2-dichlorobenzene(1,2-DCB)and CO_(2) selectivity,the optimal VO_(x) content of 4.06%(in weight)in VO_(x)/TiO_(2) catalyst is first confirmed.By modifying CeO_(x) and WO_(x),a novel honeycomb-type catalyst of VO_(x)-CeO_(x)-WO_(x)/TiO_(2) achieves the highest CE(93.1%-93.6%)and CO_(2) selectivity(40.9%-60.7%)at 150-200℃.It was found that the CeO_(x) and WO_(x) can improve the catalytic activity by enriching the surface content of V and O,increasing the proportion of V5+and Osurf,enlarging the supply source of reactive oxygen species and their storage capacity,and accelerating the redox cycle of VO_(x),CeO_(x),WO_(x),and reactive oxygen species.This study can guide the development of monolithic low-temperature catalysts with high catalytic activity in eliminating chloroaromatic organics in MSWI flue gas.

关 键 词：VO_(x)/TiO_(2)catalysts Honeycomb catalysts Catalytic activity 1 2-dichlorobenzene Modification of CeO_(x)and WOx 

分 类 号：O64[理学—物理化学]