Low temperature high activity of M (M = Ce, Fe, Co, Ni) doped M-Mn/TiO2 catalysts for NH3-SCR and in situ DRIFTS for investigating the reaction mechanism

被引：190

作者：

Xie, Shangzhi ^{[1
]}

Li, Lulu ^{[1
]}

Jin, Lijian ^{[1
]}

Wu, Yaohui ^{[1
]}

Liu, Hao ^{[1
]}

Qin, Qiuju ^{[1
]}

Wei, Xiaoling ^{[1
]}

Liu, Jiaxing ^{[1
]}

Dong, Lihui ^{[1
]}

Li, Bin ^{[1
]}

机构：

[1] Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc In, Nanning 530004, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2020年 / 515卷

关键词：

In situ DRIFTS; NH3-SCR; Resistance of H2O and SO2; Surface acidity; Mn/TiO2; SO2; TOLERANCE; PHYSICOCHEMICAL PROPERTIES; CE-MN/TIO2; CATALYSTS; SUPERIOR CATALYST; MN/TIO2; CATALYST; NO REDUCTION; NH3; PERFORMANCE; RESISTANCE; SCR;

D O I：

10.1016/j.apsusc.2020.146014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The loading of Mn on TiO2 for NH3-SCR has good low temperature catalytic activity and has been extensively studied. In this experiment, a series of second metals (Ce, Fe, Co, Ni) were added to modify the Mn/TiO2 mixed oxide. The experimental results show that Ni-Mn/TiO2 has excellent catalytic activity, but the addition of Co element did not increase the catalytic activity. The excellent catalytic activity of Ni-Mn/TiO2 is mainly due to its the strong interaction, which enhances the reducibility, increases the total acid amount, Ti3+ ratio, Mn4+ ratio, and the proportion of adsorbed oxygen. These factors facilitate the adsorption and activation of reactant molecules. In addition, in situ DRIFTS results indicate that both the B acid site and the L acid site function at 200 degrees C, bidentate nitrate not participate in the catalytic reaction and the Langmuir-Hinshelwood (L-H) mechanism dominates at 200 degrees C.

引用

页数：12

共 59 条

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