反应条件对Ni-CaO-ZrO2催化剂上CH4-CO2重整反应及积炭的影响

孙楠楠; 闻霞; 王峰; 彭伟才; 肖福魁; 魏伟; 孙予罕; 李海

反应条件对Ni-CaO-ZrO₂催化剂上CH₄-CO₂重整反应及积炭的影响

孙楠楠^1,2,
闻霞¹,
王峰¹,
彭伟才¹,
肖福魁¹,
魏伟^1,,
孙予罕^1,3,
李海⁴

1.
中国科学院山西煤炭化学研究所煤转化国家重点实验室, 山西太原 030001;
2.
中国科学院研究生院, 北京 100049;
3.
中国科学院上海高等研究院低碳转化中心, 上海 201203;
4.
重庆理工大学化学化工学院,重庆 400054

基金项目: 国家重点基础研究发展规划(973计划, 2011CB201405)

详细信息

通讯作者:
魏伟(1971-), 博士, 研究员, 从事CO₂捕获利用和多相催化研究, E-mail: weiwei@sxicc.ac.cn

中图分类号: O643.3
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- 文章访问数: 1862
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出版历程
- 收稿日期: 2011-04-13
- 刊出日期: 2012-03-31

Influences of reaction conditions on the CH₄-CO₂ reforming and coking properties of a Ni-CaO-ZrO₂ catalyst

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001,China;
2.
Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
3.
Low Carbon Conversion Center, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, China;
4.
Department of Chemistry and Chemical Engineering,Chongqing University of Technology, Chongqing 400054, China

摘要

摘要: 用共沉淀法制备了Ni-CaO-ZrO₂催化剂,并将其用于CH₄-CO₂重整反应。考察了反应温度、空速和反应物配比对催化剂性能和积炭的影响。通过热力学计算和实验表征研究发现,反应条件对CH₄-CO₂重整反应结果和积炭有重要的影响。由于高温条件同时有利于CH₄裂解和碳物种的及时消除,升高温度可以提高催化剂的活性和稳定性。增大空速则使CH₄的转化率和消碳反应的速率均降低,导致积炭量增加。同时,反应物配比对催化剂表面的积炭量也有很大影响;稍高的CO₂/CH₄摩尔比有利于抑制CH₄-CO₂重整反应过程中的积炭。
- 甲烷 /
- 二氧化碳 /
- 重整 /
- 积炭 /
- 程序升温氧化
Abstract: CH₄-CO₂ reforming was carried out over a Ni-CaO-ZrO₂ catalyst prepared by co-precipitation. The influence of reaction conditions like temperature, space velocity and feed component on CH₄-CO₂ reforming and coking properties was studied. Thermodynamic calculation as well as experimental measurement indicated that the reaction conditions play an important role in the behaviors of reforming and coke deposition. Higher activity and stability are observed under higher temperature due to the enhancement of both CH₄ decomposition and elimination of carbon species formed at such condition. At higher space velocity, both the conversion of CH₄ and the rate of carbon elimination are decreased, resulting in an increase of carbon deposition. The component of feed gases also has a significant impact on the amount of carbon deposited; a higher CO₂/CH₄ molar ratio is favored in suppressing coking during the reforming reaction.
- methane /
- carbon dioxide /
- reforming /
- carbon deposition /
- temperature programmed oxidation (TPO)

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参考文献(15)

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反应条件对Ni-CaO-ZrO₂催化剂上CH₄-CO₂重整反应及积炭的影响

通讯作者:
魏伟(1971-), 博士, 研究员, 从事CO₂捕获利用和多相催化研究, E-mail: weiwei@sxicc.ac.cn

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Influences of reaction conditions on the CH₄-CO₂ reforming and coking properties of a Ni-CaO-ZrO₂ catalyst

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