book: Effect of CO on NO oxidation over platinum based catalysts for hybrid fast SCR process [An article...

book: Effect of CO on NO oxidation over platinum based catalysts for hybrid fast SCR process [An article from: ... | M.F. Irfan, J.H. Goo, ... ...

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	• Effect of CO on NO oxidation over platinum based catalysts for hybrid fast SCR process [An article from: ... M.F. Irfan, J.H. Goo, ... Elsevier, 2007 - 5 pages view larger image
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This digital document is a journal article from Chemosphere, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
The oxidation characteristics of NO over Pt/TiO"2 (anatase, rutile) catalysts have been determined in a fixed bed reactor as a function of O"2, CO and SO"2 concentrations in the presence of 8% water. The conversion of NO to NO"2 increases with increasing O"2 concentration up to 12% and it levels off. This saturation effect is more pronounced over rutile-Pt/TiO"2 (r-Pt/TiO"2) than that of anatase-Pt/TiO"2 (a-Pt/TiO"2). The presence of CO increases NO oxidation significantly and this enhanced effect is more pronounced on a-Pt/TiO"2 than that on r-Pt/TiO"2 with increasing CO concentration at lower temperatures. The same effect is also observed on the catalysts with different Pt and tungsten oxide (WO"3) loadings. With increasing Pt and WO"3 loadings on TiO"2 support (Pt-WO"3/TiO"2), formation of NO"2 is high even at lower temperatures. The presence of SO"2 significantly suppresses the oxidation of NO over both r-Pt/TiO"2 and a-Pt/TiO"2 catalysts but it is less pronounced due to low stability of sulfate on a-Pt/TiO"2.

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