期刊
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
卷 407, 期 -, 页码 1-7出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2015.06.017
关键词
Mn/TiO2 catalyst; Deactivation; Zn; Pb; Characterization; DFT
资金
- National High Technology Research and Development Program(863 Program) of China [2013AA065002]
- National Natural Science Foundation of China [21107040]
- Natural Science Foundation of Shanghai [14ZR1417800]
- Scientific Problem Tackling Program of Science and Technology Commission of Shanghai Municipality [13DZ2260900, 14DZ1200201, 14DZ1200202]
Heavy metals have been proven to be of deactivation effect on SCR catalyst. In this paper, the poisoning effect of heavy metals (Zn and Pb) on Mn/TiO2 catalyst was investigated based on experimental and theoretical study. It was found that both of Zn and Pb had a poisoning effect on Mn/TiO2 catalyst and the poisoning effect of Zn was more obvious. The characterization results indicated that the doping of heavy metals on Mn/TiO2 surface would lead to a great decrease of reducibility, surface acidity and NO adsorption ability. The results of XPS characterization revealed the decrease of Mn4+ atomic concentration and chemisorbed oxygen species caused by the doping of heavy metals. Based on the above mentioned unfavorable properties, the doping of heavy metals would cause a serious deactivation of Mn/TiO2 catalyst. From the results of OFT calculations, it could be concluded that the doping of heavy metals on Mn/TiO2 catalyst resulting in a great decrease of NH3 adsorption capacity and NO adsorption ability, which agrees well with the experimental results. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据