A Comparative Study of Catalytic Partial Oxidation of Methane Over CeO(2) Supported Metallic Catalysts
- Title
- A Comparative Study of Catalytic Partial Oxidation of Methane Over CeO(2) Supported Metallic Catalysts
- Author
- 정용재
- Keywords
- Catalytic Partial Oxidation of Methane; Noble Metal Nanoparticles; Nickel; CeO2; Synthesis Gas; Carbon Deposition
- Issue Date
- 2011-07
- Publisher
- American Scientific Publishers
- Citation
- Journal of nanoscience and nanotechnology,Vol.11 No.7 [2011],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, H-2-temperature programmed reduction (H-2-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 (similar to 3 nm) than compared to other M/CeO2 catalysts. The catalytic tests were carried out in a fixed R-mix ratio of 2 (CH4/O-2) in a fixed-bed reactor, operating isothermally at atmospheric pressure. From time-on-stream analysis at 700 degrees C 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://www.ingentaconnect.com/content/asp/jnn/2011/00000011/00000007/art00151
- ISSN
- 1533-4880
- DOI
- 10.1166/jnn.2011.4383
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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