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Catalytic performance of Ru nanoparticles supported on different mesoporous silicas for preferential oxidation of CO in H2-rich atmosphere

Paper ID Volume ID Publish Year Pages File Format Full-Text
40636 45860 2012 10 PDF Available
Title
Catalytic performance of Ru nanoparticles supported on different mesoporous silicas for preferential oxidation of CO in H2-rich atmosphere
Abstract

Ru catalysts supported on different mesoporous silicas, MCM-41, MCM-48, SBA-15 and KIT-6, were applied to the preferential oxidation of CO in a H2-rich atmosphere (PROX). The properties of mesoporous support and the supported Ru catalysts were investigated using N2 physisorption, FTIR, TEM, CO chemisorption, H2-TPR and XPS. The performance of Ru catalysts in PROX highly relates to the Ru dispersion, support pore structure, Ru reducibility and the interaction between Ru and support. Ru/KIT-6 presents the highest surface activity (TOF values), owing to the easiest reducibility of Ru. Nevertheless, its poor Ru dispersion results in a low number of surface active sites, leading to the low CO conversion value over Ru/KIT-6. Ru/MCM-41 can achieve full CO conversion and the high CO2 selectivity in the reaction temperature range of 115–180 °C owing to the high Ru dispersion from the strong interaction between Ru and MCM-41.

Graphical abstractTEM image of Ru/MCM-41.Figure optionsDownload full-size imageDownload high-quality image (141 K)Download as PowerPoint slideHighlights► Ru catalysts supported on mesoporous silicas, MCM-41, MCM-48, SBA-15 and KIT-6. ► Preferential oxidation of CO in a H2-rich atmosphere (PROX). ► Ru/KIT-6 presents the highest surface activity.

Keywords
PROX; CO2 selectivity; Ru dispersion; Mesoporous silica
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 447–448, 7 December 2012, Pages 200–209
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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