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.
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收藏
页码：3365 / 3367
页数：3
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