CoMnOx/Al2O3/monolith整体催化剂的制备及其催化臭氧分解性能  

Preparation of CoMnOx/Al2O3/monolith catalyst for ozone elimination

作　　者：张磊[1,2] 王胜 汪明哲 倪长军 王树东 Zhang Lei;Wang Sheng;Wang Mingzhe;Ni Changjun;Wang Shudong(National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院大连化学物理研究所,洁净能源国家实验室,辽宁大连116023 [2]中国科学院大学,北京100049

出　　处：《工业催化》2020年第1期17-23,共7页Industrial Catalysis

基　　金：国家重点研发计划(2016YFC0204302);国家自然科学基金面上项目(21676267)

摘　　要：以铝胶为粘结剂,采用浆料涂覆法制备整体式臭氧分解催化剂CoMnOx/Al2O3/monolith。考察固体颗粒性质、浆料流变性质和焙烧温度对整体催化剂机械稳定性的影响。结果表明,当Al2O3与CoMnOx投料质量比为1∶4、球磨时间2 h、浆料pH=3.5~4.0、分散剂聚乙二醇用量6%(质量分数)和焙烧温度400℃时,制备的催化剂机械稳定性好,超声30 min,涂层脱落率为2.5%。评价该催化剂的臭氧催化分解性能,在臭氧浓度为15×10^-6(体积分数),空速为60000 h^-1,反应温度为90℃,催化剂反应670 h后臭氧转化率仍维持在99.8%,将反应温度降为80℃,继续反应400 h后转化率仍维持在99.0%。The CoMnOx/Al2O3/monolith catalyst for ozone elimination had been prepared by washcoating using Al sol as a binder.The dependence of the mechanical stability of monolithic catalysts was investigated on the particle properties,the rheological properties of the slurry and the calcined temperature.It was pointed out that the weight loss was only 2.5%after ultrasonic treatment for 30 min when washcoating was performed under Al2O3/CoMnOxmass fraction of 1∶4,ball milling time of 2 h,slurry pH=3.5-4.0,dispersant polyethylene glycol mass fraction of 6%,and calcinations temperature of 400℃.Furthermore,the catalytic activity of the CoMnOx/Al2O3/monolith for ozone decomposition was excellent under the inlet ozone volume concentration of 15×10^-6 and space velocity of 60000 h^-1.The ozone conversion kept above 99.8%at 90℃after 670 h of reaction.With the descent of temperature to 80℃,the ozone conversion was maintained above 99%for additional 400 h.

关 键 词：催化剂工程 堇青石蜂窝 机械稳定性 流变性质 焙烧温度 臭氧分解 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]