Effect of CO on NO oxidation over platinum based catalysts for hybrid fast SCR process

被引：35

作者：

Irfan, Muhammad Faisal

Goo, Jeong Hoi

Kim, Sang Done ^{[1
]}

Hong, Sung Chang

机构：

[1] Korea Adv Inst Sci & Technol, Energy & Environm Res Ctr, Dept Chem & Biomol Engn, Taejon 305701, South Korea

[2] Kyonggi Univ, Dept Environm Engn, Suwon 442760, South Korea

来源：

CHEMOSPHERE | 2007年 / 66卷 / 01期

关键词：

hybrid fast SCR; NO oxidation; NOx; TiO2; anatase; rutile;

D O I：

10.1016/j.chemosphere.2006.05.044

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The oxidation characteristics of NO over Pt/TiO2 (anatase, rutile) catalysts have been determined in a fixed bed reactor as a function of O-2, CO and SO2 concentrations in the presence of 8% water. The conversion of NO to NO2 increases with increasing O-2 concentration up to 12% and it levels off. This saturation effect is more pronounced over rutile-Pt/TiO2 (r-Pt/TiO2) than that of anatase-Pt/TiO2 (a-Pt/ TiO2). The presence of CO increases NO oxidation significantly and this enhanced effect is more pronounced on a-Pt/TiO2 than that on r-Pt/TiO2 with increasing CO concentration at lower temperatures. The same effect is also observed on the catalysts with different Pt and tungsten oxide (WO3) loadings. With increasing Pt and WO3 loadings on TiO2 support (wPt-WO3/TiO2), formation of NO2 is high even at lower temperatures. The presence of SO2 significantly suppresses the oxidation of NO over both r-Pt/TiO2 and a-Pt/TiO2 catalysts but it is less pronounced due to low stability of sulfate on a-Pt/TiO2. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：54 / 59

页数：6

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