fulltext.study @t Gmail

MnOx/Pt/Al2O3 catalysts for CO oxidation in H2-rich streams

Paper ID Volume ID Publish Year Pages File Format Full-Text
48839 46522 2007 10 PDF Available
Title
MnOx/Pt/Al2O3 catalysts for CO oxidation in H2-rich streams
Abstract

The catalytic activity of Pt on alumina catalysts, with and without MnOx incorporated to the catalyst formulation, for CO oxidation in H2-free as well as in H2-rich stream (PROX) has been studied in the temperature range of 25–250 °C. The effect of catalyst preparation (by successive impregnation or by co-impregnation of Mn and Pt) and Mn content in the catalyst performance has been studied. A low Mn content (2 wt.%) has been found not to improve the catalyst activity compared to the base catalyst. However, catalysts prepared by successive impregnation with 8 and 15 wt.% Mn have shown a lower operation temperature for maximum CO conversion than the base catalyst with an enhanced catalyst activity at low temperatures with respect to Pt/Al2O3. A maximum CO conversion of 89.8%, with selectivity of 44.9% and CO yield of 40.3% could be reached over a catalyst with 15 wt.% Mn operating at 139 °C and λ = 2. The effect of the presence of 5 vol.% CO2 and 5 vol.% H2O in the feedstream on catalysts performance has also been studied and discussed. The presence of CO2 in the feedstream enhances the catalytic performance of all the studied catalysts at high temperature, whereas the presence of steam inhibits catalysts with higher MnOx content.

Keywords
CO oxidation; Selective CO oxidation; Pt catalyst; Selectivity; MnOx
First Page Preview
MnOx/Pt/Al2O3 catalysts for CO oxidation in H2-rich streams
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 70, Issues 1–4, 31 January 2007, Pages 532–541
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us