A Comparative Study of Catalytic Partial Oxidation of Methane Over CeO2 Supported Metallic Catalysts
- A Comparative Study of Catalytic Partial Oxidation of Methane Over CeO2 Supported Metallic Catalysts
- 안기용; 정용재; 오진희; 다사리하리; 김형철; 김혜령; 손지원; 이해원; 이종호
- SOFC; Catalyst; CeO2; POX; nanoparticle; Catalytic Partial Oxidation of Methane; Noble Metal Nanoparticles; Nickel; Synthesis Gas; Carbon Deposition
- Issue Date
- Journal of nanoscience and nanotechnology
- VOL 11, NO 7, 6414-6419
- 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.
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