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Oxidative steam reforming of methane over Ni/α-Al2O3 modified with trace noble metals

Paper ID Volume ID Publish Year Pages File Format Full-Text
43132 45956 2009 7 PDF Available
Title
Oxidative steam reforming of methane over Ni/α-Al2O3 modified with trace noble metals
Abstract

Ni catalysts supported on α-Al2O3 modified with small amounts of noble metals (Pd, Pt, Au, Ir, Rh and Ru) were prepared by a co-impregnation method to investigate catalytic performance and catalyst bed temperature profile in oxidative steam reforming of methane. Modification of the Ni catalyst with noble metals was effective to decreasing the bed temperature near the catalyst bed inlet, and it is found that Pd is the most effective modifier among the noble metals. Additive effect of Pd has some aspects: the increase of the metal dispersion, suppression of oxidation and enhancement of reducibility judging from characterization results of H2 adsorption and evaluation by pulse reaction technique using O2 and H2. The extended X-ray absorption fine structure (EXAFS) analysis suggests that the excellent properties can be due to small Pd metallic cluster interacted with Ni particles.

Graphical abstractThe addition of trace noble metals (Pd, Pt, Au, Ir, Rh and Ru) over Ni/α-Al2O3 suppressed the hot-spot formation in oxidative steam reforming of methane. In particular, the addition of trace Pd to Ni/α-Al2O3 is the most effective because the small Pd clusters interacted with Ni metal particles are formed and the structure gives higher reduction rate and lower oxidation rate than other catalysts.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Oxidative reforming; Steam reforming; Methane; Nickel; Noble metal; Thermography; Hot spot
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Oxidative steam reforming of methane over Ni/α-Al2O3 modified with trace noble metals
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 358, Issue 2, 1 May 2009, Pages 186–192
Authors
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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