引用本文:
严前古, 吴廷华, 李基涛, 翁维正, 万惠霖, 于作龙, 储伟, 远松月. Ni/Al2O3催化剂上甲烷部分氧化制合成气反应积炭的研究[J]. 应用化学,
1999, 16(4): 20-23.
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.
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.
Ni/Al2O3催化剂上甲烷部分氧化制合成气反应积炭的研究
摘要:
在固体床流动反应装置上考察了Ni/γ-Al2O3催化甲烷部分氧化制合成气反应过程中的积炭问题.结果表明:反应床层温度升高,积炭量降低;温度降低,积炭量增加,当温度在600℃附近时,积炭量增加很快.积炭产生位于催化剂床层出口段.随着压力的增加,催化剂积炭量增加很快.当空速超过一定值时,随着空速的增加,催化剂积炭量减少,说明积炭产生过程受动力学影响很大.根据反应体系的热力学分析与各种反应条件对催化剂积炭的影响得出甲烷部分催化氧化制合成气反应体系中的积炭主要是由CO歧化和CO+H2还原反应产生,而不是CH4的裂解.
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关键词:
- 甲烷
- / 部分氧化
- / 合成气制备
- / 积炭
- / Ni/Al2O3催化剂
English
Carbon Deposition on Ni/Al2O3 Catalyst in Partial Oxidation of Methane to Syngas
Abstract:
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.
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Key words:
- methane
- / partial oxidation
- / syngas preparation
- / carbon deposition
- / Ni/Al2O3 catalyst
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