Influence of Ageing, Silver Loading and Type of Reducing Agent on the Lean NO x Reduction Over Ag-Al2O3 Catalysts

被引：5

作者：

Gunnarsson, Fredrik ^{[1
]}

Zheng, Jenny-Yue ^{[1
]}

Kannisto, Hannes ^{[1
]}

Cid, Clement ^{[1
]}

Lindholm, Anna ^{[2
]}

Milh, Miroslawa ^{[2
]}

Skoglundh, Magnus ^{[1
]}

Harelind, Hanna ^{[1
]}

机构：

[1] Chalmers, Dept Chem & Biol Engn, Competence Ctr Catalysis, S-41296 Gothenburg, Sweden

[2] Volvo Technol Coparat, S-41288 Gothenburg, Sweden

来源：

TOPICS IN CATALYSIS | 2013年 / 56卷 / 1-8期

关键词：

Ag-alumina; HC-SCR; Ageing; Bio-diesel; n-Octane; ALUMINA CATALYSTS; SELECTIVE REDUCTION; AG/AL2O3; HYDROCARBONS; METHANE;

D O I：

10.1007/s11244-013-9989-1

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The influence of ageing temperature, silver loading and type of reducing agent on the lean NO (x) reduction over silver-alumina catalysts was investigated with n-octane and bio-diesel (NExBTL) as reducing agent. The catalysts (2 and 6 wt% Ag-Al2O3) were prepared with a sol-gel method including freeze drying and the evaluation of NO (x) reduction and aging were performed using a synthetic gas-flow reactor. The results indicate a relatively high NO (x) reduction for both reducing agents. The hydrothermally treated 6 wt% Ag-Al2O3 sample displays a maximum NO (x) reduction of 78 % at 350 A degrees C for n-octane as reductant and the corresponding value for NExBTL is 60 %. Furthermore, the catalysts show high durability and an increase in activity for NO (x) reduction after ageing at temperatures up to 650 A degrees C, with n-octane as reducing agent.

引用

页码：416 / 420

页数：5

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