TiO_(2)负载V-W复合双金属催化剂氯苯催化燃烧性能研究  

Study on catalytic combustion of chlorobenzene over TiO_(2)-supported V-W composite bimetallic catalysts

作　　者：邢德风 王胜[2] 王建成[1] 潘大海[3] 宋学顶 XING De-feng;WANG Sheng;WANG Jian-cheng;PAN Da-hai;SONG Xue-ding(State Key Laboratory of Clean and Efficient Coal Utilization,Taiyuan University of Technology,Taiyuan 030024,China;Dalian National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;Research Centre of Energy Chemical&Catalytic Technology,College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanghai Environmental Sanitation Engineering Design Institute Company Limited,Shanghai 200232,China)

机构地区：[1]太原理工大学省部共建煤基能源清洁高效利用国家重点实验室,山西太原030024 [2]中国科学院大连化学物理研究所清洁能源国家实验室,辽宁大连116023 [3]太原理工大学化学化工学院能源化学与催化技术研究中心,山西太原030024 [4]上海环境卫生工程设计院有限公司,上海200232

出　　处：《燃料化学学报》2022年第9期1221-1227,共7页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金重点项目(U20A20132)资助。

摘　　要：本研究采用等体积浸渍法制备了一系列TiO_(2)负载V-W双金属氧化物催化剂,考察了V/W比例对于氯苯催化燃烧活性和HCl选择性的影响。结果表明,适量W的掺杂(5V5W-Ti和3V7W-Ti)提高了氯苯催化燃烧活性和HCl选择性。结合BET、XRD、XPS、H_(2)-TPR、NH_(3)-TPD和Py-FTIR等表征,说明其高的活性是由于其高活性组分分散度和丰富的催化剂表面吸附氧;适量W的掺杂显著增强了催化剂表面酸性,尤其是强酸和Brønsted酸,从而提高了产物中HCl的选择性。A series of TiO_(2)-supported V-W bimetallic catalysts were prepared by incipient wetness impregnation method.The effects of V/W ratios on the catalytic combustion performance for chlorobenzene were investigated.The results showed that proper W doping(5V5W-Ti and 3V7W-Ti)improved the catalytic combustion activity of chlorobenzene and the selectivity of HCl.In combination with BET,XRD,XPS,H_(2)-TPR,NH_(3)-TPD and Py-FTIR characterizations,it indicated that higher activity for chlorobenzene oxidation was attributed to the high dispersion of the active species and the abundant surface adsorbed oxygen.In addition,moderate doping of W significantly enhanced the surface acidity of catalysts,especially strong acids and Brønsted acids,and thus improved the selectivity to HCl in the products.

关 键 词：氯苯 催化燃烧 双金属催化剂 HCl选择性 

分 类 号：X511[环境科学与工程—环境工程]