催化作用
X射线光电子能谱
结晶度
氮氧化物
选择性
化学
吸附
氧气
无机化学
核化学
化学工程
物理化学
结晶学
工程类
有机化学
燃烧
生物化学
作者
Xiao Feng Sun,Rui‐tang Guo,Jian Liu,Zaiguo Fu,Shuai-wei Liu,Weiguo Pan,Xu Shi,Hao Qin,Zhongyi Wang,Xingyu Liu
标识
DOI:10.1016/j.ijhydene.2018.07.057
摘要
In this work, Mo-modified Mn/TiO2 catalysts synthetized by co-precipitation method were applied in the SCR abatement of NOx by NH3. Ranging from 50 to 400 °C, Mn/TiO2 modified with Mo showed higher efficiency in SCR reaction than Mn/TiO2 without Mo. Among Mn/TiO2 catalysts with different Mo doping amount, MnMo/TiO2-0.04 catalyst showed not only the highest SCR activity but also the best N2 selectivity. Furthermore, MnMo/TiO2-0.04 also exhibited stronger resistance to SO2 poisoning compared with Mn/TiO2. On the basis of the characterization means including BET, XRD, H2-TPR, XPS and NH3-TPD, MnMo/TiO2-0.04 was characterized with the decreased crystallinity, the increased reducibility and more surface acid sites, along with the enrichment of surface adsorbed oxygen species and Mn4+ species. Furthermore, the analysis results of in situ DRIFT study showed that Langmuir-Hinshewood (L-H) model should be employed in explaining the accelerated SCR reaction over MnMo/TiO2-0.04.
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