Reducing N2O Formation over CO-SCR Systems with CuCe Mixed Metal Oxides

被引：52

作者：

Sun, Ruobing ^{[1
]}

Yu, Feng ^{[1
,2
]}

Wan, Yinji ^{[1
]}

Pan, Keke ^{[1
]}

Li, Wenjian ^{[1
]}

Zhao, Huanhuan ^{[1
]}

Dan, Jianming ^{[1
]}

Bin Dai ^{[1
]}

机构：

[1] Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China

[2] Shihezi Univ, Bingtuan Ind Technol Res Inst, Shihezi 832003, Peoples R China

来源：

CHEMCATCHEM | 2021年 / 13卷 / 11期

关键词：

CuCe; CO-SCR; Reducing N2O; in-situ DRIFTS; Reaction mechanism; Metal Oxides; SELECTIVE CATALYTIC-REDUCTION; NO REDUCTION; STRUCTURAL CHARACTERISTICS; REACTION-MECHANISM; DOPED CEO2; PERFORMANCE; OXIDATION; CERIA; TEMPERATURE; SURFACE;

D O I：

10.1002/cctc.202100057

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：

In the CO-SCR reaction, reducing by-product N2O formation helps to convert more NO into clean N-2, which has a great significance to environmental governance. In this study, the CuCe mixed metal oxides with different molar ratios of Cu to Ce were prepared, characterized and evaluated to study the effect on the products of NO reduction by CO. The experimental results showed that the CuCe-1 : 3 catalyst showed superior NO conversion with over 90 % N-2 selectivity in the operating temperature window, and there were no amounts of N2O by-product at 50-200 degrees C. The higher oxygen vacancy concentration and appearance of (NO)(2) dimer inhibited N2O formation at low temperature. Finally, the reaction paths for the CuCe catalysts generating different products (N-2, N2O) were proposed in the CO-SCR reaction based on in-situ DRIFTS results.

引用

页码：2709 / 2718

页数：10

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