Selective reduction of NO by HNCO over Pt promoted Al2O3

被引：36

作者：

Acke, F ^{[1
]}

Westerberg, B

Skoglundh, M

机构：

[1] Chalmers Univ Technol, Competence Ctr Catalysis, S-41296 Gothenburg, Sweden

[2] Chalmers Univ Technol, Dept Inorgan Chem, S-41296 Gothenburg, Sweden

[3] Chalmers Univ Technol, Dept Chem React Engn, S-41296 Gothenburg, Sweden

[4] Univ Gothenburg, Dept Inorgan Chem, Gothenburg, Sweden

来源：

JOURNAL OF CATALYSIS | 1998年 / 179卷 / 02期

关键词：

D O I：

10.1006/jcat.1998.2239

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 activity of Pt supported on gamma-Al2O3 towards HNCO oxidation and reduction of NO by HNCO under oxygen excess is examined under transient conditions (temperature ramps between 100 and 500 degrees C). Formation of N-2, N2O, NO, and NO2 is observed. Isotope labelled (NO)-N-15 is used to show the scrambling of nitrogens in N-2 ((NN)-N-14-N-15) and N2O ((NNO)-N-14-N-15). Adsorbed species on the surface are characterised by in-situ FTIR spectroscopy in order to obtain information on reaction intermediates. Adsorbed NNx species are discussed as important intermediates in the N-2 and N2O formation. The absence of Pt results in a delay in HNCO ignition and only a small N2O formation is observed. (C) 1998 Academic Press.

引用

页码：528 / 536

页数：9

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