中国石油大学学报（自然科学版）Issue(6)：167-172,6.DOI:10.3969/j.issn.1673-5005.2014.06.025
MCM-41分子筛负载 Pd/La0.8 Ce0.2 MnO3低温催化燃烧甲苯实验研究
Experimental study on low temperature catalytic combustion of toluene by Pd/La 0. 8 Ce 0. 2 MnO 3 supported on MCM-41
摘要
Abstract
Pd/ La0. 8 Ce0. 2 MnO3 / MCM-41 catalyst was prepared by isovolumetric impregnation method using the noble metal modified perovskite as the active component. The catalytic combustion mechanism was investigated using toluene as the model pollutant, in which the influence of calcination temperature and loading capacity on the catalytic reaction was considered. Al-so, the catalyst was characterized by Brunauer-Emmett-Teller (BET),X-ray diffraction (XRD) and scanning electron micro-scope (SEM). It is found that the Pd/ La0. 8 Ce0. 2 MnO3 / MCM-41 possesses an integrated perovskite structure, on which the Pd has been dispersed evenly, and the catalyst performs good activity. The light-off temperature and the complete combustion temperature of toluene is only 20 3 ℃ and 283 ℃ respectively when the loading capacity of La0. 8 Ce0. 2 MnO3 is 20% under the calcination temperature of 750 ℃ . At the same scenario, the complete combustion temperature of toluene is only 235 ℃ after the modification of adding 0. 05% Pd, which is attributed to the significant enhanced catalytic activity of La0. 8 Ce0. 2 MnO3 /MCM-41. Also, the active components on the catalyst show good dispersity with even particle size.关键词
挥发性有机物/钙钛矿/贵金属/低温催化燃烧/分子筛Key words
VOCs/perovskite/noble metal/catalytic combustion/molecular sieve分类
资源环境引用本文复制引用
王永强,肖丽,赵东风,赵朝成,刘芳,孙启猛..MCM-41分子筛负载 Pd/La0.8 Ce0.2 MnO3低温催化燃烧甲苯实验研究[J].中国石油大学学报（自然科学版）,2014,(6):167-172,6.基金项目
中央高校基本科研业务费专项(24720142054A) （24720142054A）
中国石油大学自主创新项目(13CX06054A) （13CX06054A）
