A Comparative Study of Catalytic Partial Oxidation of Methane Over CeO2 Supported Metallic Catalysts
- Authors
- Ahn, Kiyong; Chung, Yong-Chae; Oh, Jin Hee; Prasad, D. Hari; Kim, Hyoungchul; Kim, Hae-Ryoung; Son, Ji-Won; Lee, Hae-Weon; Lee, Jong-Ho
- Issue Date
- Jul-2011
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Catalytic Partial Oxidation of Methane; Noble Metal Nanoparticles; Nickel; CeO2; Synthesis Gas; Carbon Deposition
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.11, no.7, pp.6414 - 6419
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 11
- Number
- 7
- Start Page
- 6414
- End Page
- 6419
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/168073
- DOI
- 10.1166/jnn.2011.4383
- ISSN
- 1533-4880
- 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.
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