钙钛矿型La_(0.8)Sr_(0.2)MnO_3催化剂对氯苯催化燃烧的性能研究  

The study of catalytic oxidation of chlorobenzene over La_(0.8)Sr_(0.2)MnO_3 perovskite catalyst

作　　者：刘亚芹[1] 蔡文祥[2] 余中平[1] 朱晓莹[1] 黄海凤[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310032 [2]浙江省环境保护局环境工程技术评估中心,浙江杭州310012

出　　处：《浙江工业大学学报》2007年第5期477-481,共5页Journal of Zhejiang University of Technology

基　　金：浙江省科技厅计划资助项目(2005C33041)

摘　　要：采用共沉淀法制备了钙钛矿型La0.8Sr0.2MnO3催化剂,用XRD,SEM,BET对催化剂进行了表征,考察了催化剂对氯苯的催化燃烧性能.结果表明：La0.8Sr0.2MnO3催化剂呈现钙钛矿晶型,催化剂具有较好的分散性,颗粒尺寸约为60 nm,对氯苯有较好的催化燃烧性能.在氯苯浓度为800～1 600 mg/m^3,空速（GHSV）为1 000～4 000 h^-1的情况下,反应温度高于350 ℃时,氯苯几乎能完全去除.稳定性实验结果表明：该催化剂在氯苯浓度为800 mg/m^3,空速（GHSV）为1 000 h^-1,反应温度为410 ℃的条件下,经历了100 h连续催化燃烧后,没有出现明显失活,说明La0.8Sr0.2MnO3催化剂对含氯有机物具有较强的抗毒性.La0.8Sr0.2MnO3 of perovskite catalyst was prepared by a co-precipitation method. The catalyst was characterized by XRD, SEM and BET. The catalytic combustion of chlorobenzene as a model reaction was used to evaluate the performance of the catalyst. The experimental results indicated that La0.8Sr0.2MnO3 had perfect crystalline phase and well distribution and the mean particle size of perovskite was about 60 nm. When the mass concentration of inlet chlorobenzene gas was 800-1 600 mg/m^3 , the gas hourly space velocity （GHSV） was 1 000-4 000 h^-1 and the temperature was above 350 ℃, chlorobenze.ne could be all removed over the catalyst. The results of stability test showed that La0.8Sr0.2MnO3 perovskite catalyst had not significantly changed after 100 h on-stream when the concentration of inlet chlorobenzene gas was 800 mg/m^3 , GHSV was 1 000h^-1 and the temperature was 410 ℃.

关 键 词：LA0.8SR0.2MNO3 钙钛矿 氯苯 催化燃烧 抗毒性 

分 类 号：O643.32[理学—物理化学]