Effects of NO2, CO, O2, and SO2 on oxidation kinetics of NO over Pt-WO3/TiO2 catalyst for fast selective catalytic reduction process

✍ Scribed by Muhammad Faisal Irfan; Jeong Hoi Goo; Sang Done Kim

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 178 KB
• Volume: 38
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.20194

✦ Synopsis

Abstract

The selective catalytic reduction rate of NO with N‐containing reducing agents can be enhanced considerably by converting a part of NO into NO~2~. The enhanced reaction rate is more pronounced at lower temperatures by using an equimolar mixture of NO and NO~2~. The kinetics of NO oxidation over Pt‐WO~3~/TiO~2~ catalyst has been determined in a fixed‐bed reactor with different concentrations of oxygen, nitric oxide, and nitrogen dioxide in the presence of 8% water. It has been found that the reaction is second order with respect to nitric oxide, first order for oxygen with a third‐order rate constant. Also, it is found that there is no effect on the reaction order with an addition of NO~2~, CO, or SO~2~. It follows the same second order but the reaction rate is found to be changed. It is observed that in the case of NO~2~ and SO~2~, the reaction rate tends to decrease, but it increases with the addition of CO into the feed. © 2006 Wiley Periodicals, Inc. Int J Chem Kinet 38: 613–620, 2006