微波诱导SiC改性Co-Ce/Al_(2)O_(3)催化剂催化氧化甲苯性能的研究  

Catalytic performance of microwave induced SiC modified Co-Ce/Al_(2)O_(3) catalyst for oxidation of toluene

作　　者：李潇祎 刘芬 何忠 汪远 胡将军[1] LI Xiao-yi;LIU Fen;HE Zhong;WANG Yuan;HU Jiang-jun(School of Resource and Environmental Sciences,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430072

出　　处：《现代化工》2022年第1期116-120,共5页Modern Chemical Industry

摘　　要：采用共沉淀法制备SiC改性5%Co-2.5%Ce/Al_(2)O_(3)催化剂,研究了不同SiC负载量改性催化剂的吸波升温性能和催化氧化甲苯性能。结果表明,随着SiC负载量的增加,催化剂吸波升温性能逐渐增强。SiC最佳负载量为5%时,催化剂催化氧化甲苯性能最佳,催化剂具有较大的比表面积和适宜的微孔结构。甲苯催化氧化活性评价结果表明,5%Co-2.5%Ce/5%SiC-Al_(2)O_(3)催化剂对不同甲苯浓度具有较强适应性,对中低浓度的甲苯降解效果显著。空速低于15 000 h^(-1)时催化剂能发挥高效催化作用,微波功率在120~385 W有利于甲苯的催化氧化。SiC modified 5% Co-25% Ce/Al_(2)O_(3) catalyst is prepared via co-precipitation method, and the performances of the catalyst with different SiC loading amount in microwave-absorbing temperature-rising and catalytic oxidation of toluene are studied.The results show that with higher SiC loading amount, the catalyst has a higher wave-absorbing temperature-rising performance.The catalyst with 5% of SiC has a large specific surface area and suitable microporous structure, and presents the best performance in catalyzing oxidation of toluene.The evaluation results show that 5% Co-2.5% Ce/5% SiC-Al_(2)O_(3) catalyst has a strong adaptability to different concentrations of toluene, and has a significant degradation effect on medium and low concentrations of toluene.The catalyst can play an efficient catalytic role when the air velocity is less than 15 000 h^(-1).Microwave power at 120 W to 385 W is conducive to the catalytic oxidation of toluene.

关 键 词：微波诱导 SiC改性催化剂 催化氧化 甲苯 

分 类 号：X701[环境科学与工程—环境工程]