Characterization of an AgCl/Al2O3 catalyst for lean NO conversion

被引：11

作者：

Aoyama, N

Yamashita, Y

Abe, A

Takezawa, N

Yoshida, K

机构：

[1] Riken Corp, Div Res & Dev, Kumagaya, Saitama 3608522, Japan

[2] Hokkaido Univ, Grad Sch Engn, Div Engn & Mat Sci, Sapporo, Hokkaido 0608628, Japan

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1999年 / 1卷 / 14期

关键词：

D O I：

10.1039/a901665a

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：

An AgCl/Al2O3 catalyst calcined at 873 K in air is highly active for the conversion of lean NO with ethanol even in the presence of SO2. The chemical and physical characteristics of the AgCl/Al2O3 catalyst were studied using X-ray diffraction, X-ray photoelectron spectroscopy and ultraviolet-visible (UV-VIS) spectroscopy. Crystallized AgCl particles were formed for the AgCl/Al2O3 catalyst calcined above 393 K in air. AgCl particles began to disperse on the Al2O3 surface upon calcination at 773 K. Dispersion of the AgCl particles progressed upon calcination at 873 K. UV-VIS spectra also showed an intense absorption band at similar to 250 nm for the AgCl/Al2O3 catalyst calcined at 873 K which can be attributed to the AgCl on Al2O3. Surface silver content in the AgCl/Al2O3 catalyst calcined at 873 K is similar to 4.2 times that of the AgCl/Al2O3 catalyst calcined at 773 K. These results suggest that effective NO conversion over the AgCl/Al2O3 catalyst calcined at 873 K in air is ascribed to the AgCl particles being well dispersed by interaction with Al2O3.

引用

页码：3365 / 3367

页数：3

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