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Oxidation of nitric oxide to nitrogen dioxide over Ru catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
48141 46494 2009 8 PDF Available
Title
Oxidation of nitric oxide to nitrogen dioxide over Ru catalysts
Abstract

A series of TiO2 supported catalysts were prepared by impregnation method in a rotary evaporator and evaluated for the oxidation of NO to NO2. Among all catalysts studied, Ru/TiO2 catalyst exhibited the best activity and a maximal NO conversion of c.a. 94% could be achieved at c.a. 275 °C at a high GHSV of 180,000 h−1. For ruthenium catalysts, the effects of supports, ruthenium loadings, pretreatment conditions and experiment conditions (feed gas composition, GHSV) on NO oxidation to NO2 were investigated in detail. The ruthenium catalysts were characterized by means of X-ray diffraction (XRD), CO pulse chemisorption, transmission electron microscopy (TEM) and temperature-programmed reduction (TPR) techniques. The active ruthenium species for NO oxidation were discussed based on the catalytic and characterization results. Moreover, the reaction mechanism for NO oxidation over Ru/TiO2 catalyst was studied by means of in situ diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS).

Keywords
NO oxidation; Ru catalysts; TiO2; TPR
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 88, Issues 1–2, 29 April 2009, Pages 224–231
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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