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

被引：7

作者：

Ahn, Kiyong ^{[1
,2
]}

Chung, Yong-Chae ^{[2
]}

Oh, Jin Hee ^{[1
]}

Prasad, D. Hari ^{[1
]}

Kim, Hyoungchul ^{[1
]}

Kim, Hae-Ryoung ^{[1
]}

Son, Ji-Won ^{[1
]}

Lee, Hae-Weon ^{[1
]}

Lee, Jong-Ho ^{[1
]}

机构：

[1] Korea Inst Sci & Technol, High Temp Energy Mat Ctr, Seoul 136791, South Korea

[2] Hanyang Univ, Dept Mat Sci & Engn, Seoul 133791, South Korea

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2011年 / 11卷 / 07期

关键词：

Catalytic Partial Oxidation of Methane; Noble Metal Nanoparticles; Nickel; CeO2; Synthesis Gas; Carbon Deposition; SYNTHESIS GAS-FORMATION; HYDROGEN-PRODUCTION; CARBON-MONOXIDE; SELECTIVE OXIDATION; ETHANOL; CONVERSION; STABILITY; MONOLITHS; NI/AL2O3; CO;

D O I：

10.1166/jnn.2011.4383

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：6414 / 6419

页数：6

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