A Comparative Study of Catalytic Partial Oxidation of Methane Over CeO2 Supported Metallic Catalysts

Title
A Comparative Study of Catalytic Partial Oxidation of Methane Over CeO2 Supported Metallic Catalysts
Authors
안기용정용재오진희다사리하리김형철김혜령손지원이해원이종호
Keywords
SOFC; Catalyst; CeO2; POX; nanoparticle; Catalytic Partial Oxidation of Methane; Noble Metal Nanoparticles; Nickel; Synthesis Gas; Carbon Deposition
Issue Date
2011-07
Publisher
Journal of nanoscience and nanotechnology
Citation
VOL 11, NO 7, 6414-6419
Abstract
In the present study, the catalytic partial oxidation of methane (CPOM) over various active metals supported on CeO2 (M/CeO2, M = Ir, Ni, Pd, Pt, Rh and Ru) has been investigated. The catalysts were characterized by X-ray diffraction (XRD), BET surface area, H2-temperature programmed reduction (H2-TPR), CO chemisorption and transmission electron microscope (TEM) analysis. Ir/CeO2 catalysts showed higher BET surface area, higher metal dispersion, small active metal nano-particles (~3 nm) than compared to other M/CeO2 catalysts. The catalytic tests were carried out in a fixed Rmix ratio of 2 (CH4/O2) in a fixed-bed reactor, operating isothermally at atmospheric pressure. From time-on-stream analysis at 700 ℃ for 12 h, a high and stable catalytic activity has been observed for Ir/CeO2 catalysts. TEM analysis of the spent catalysts showed that the decrease in the catalytic activity of Ni/CeO2 and Pd/CeO2 catalysts is due to carbon formation whereas no carbon formation has been observed for Ir/CeO2 catalysts.
URI
http://pubs.kist.re.kr/handle/201004/40151
ISSN
1533-4880
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KIST Publication > Article
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