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Citation: Yan Qiangu, Wu Tinghua, Li Jitao, Weng Weizheng, Wan Huilin, Yu Zuolong, Chu Wei, Yuan Songyue. Carbon Deposition on Ni/Al₂O₃ Catalyst in Partial Oxidation of Methane to Syngas[J]. Chinese Journal of Applied Chemistry, ;1999, 16(4): 20-23. shu

Carbon Deposition on Ni/Al₂O₃ Catalyst in Partial Oxidation of Methane to Syngas

1.
a State Key Laboratory for Physical Chemistry of Solid Surface, Department of Chemistry, Xiamen University, Xiamen 361005;
2.
b Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu;
3.
c Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun

Received Date: 28 October 1998
Available Online: 27 April 1999
Fund Project: 国家博士后基金,自然科学基金(29573128)资助课题 (29573128)

The methane oxidation to syngas on Ni/Al₂O₃ catalysts has been carried out on a fixed bed flow reactor. The effects of temperature of catalyst bed, system pressure, space velocity and n(CH₄)/n(O₂) ratio on carbon deposition on the catalyst have been investigated. The results show that the rate of carbon deposition decreased as the temperature of the catalyst bed increased and vice versa, and an obvious carbon deposition was observed at temperature near 600℃. The rate of carbon deposition also increased with increase of the system pressure and decreased with increase of the space velocity, when the latter exceeded a certain value. Based on the thermodynamic analysis of the reaction system and the experiment results, it is believed that the carbon deposition on the Ni/Al₂O₃ is mainly caused by reactions of 2CO→C+CO₂ and CO+H₂→C+H₂O, but not the decomposition of methane.
- methane,
- partial oxidation,
- syngas preparation,
- carbon deposition,
- Ni/Al₂O₃ catalyst
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Carbon Deposition on Ni/Al₂O₃ Catalyst in Partial Oxidation of Methane to Syngas