Ni-Mg-ZrO<sub>2</sub>催化剂上煤层甲烷三重整制合成气

孙来芝; 谭猗生; 张清德; 解红娟; 韩怡卓

Ni-Mg-ZrO₂催化剂上煤层甲烷三重整制合成气

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

基金项目: 国家科技部自主研究课题(2008BWZ2005); 山西省国际科技合作项目(2008081012)。

详细信息

通讯作者:
谭猗生, Tel: 0351-4044287, Fax: 0351-4044287, E-mail: tan@sxicc.ac.cn.

中图分类号: O643
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出版历程
- 收稿日期: 2011-12-03
- 修回日期: 2012-02-17
- 刊出日期: 2012-07-31

Tri-reforming of coal bed methane to syngas over the Ni-Mg-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

摘要

摘要: 采用共沉淀法制备Ni-ZrO₂和Ni-Mg-ZrO₂催化剂,用BET、XRD、H₂-TPR、CO₂-TPD等技术对催化剂进行了表征。采用固定床流动反应装置,研究了催化剂在煤层甲烷三重整制合成气反应中的催化性能;考察了反应温度和原料气体组成对反应的影响。实验结果表明,Ni-Mg-ZrO₂催化剂在反应温度800℃、常压、空速为30 000 mL/(g·h)、CH₄/CO₂/H₂O/O₂/N₂=1.0/0.45/0.45/0.1/0.4的条件下,CH₄转化率为99%,CO₂转化率为65%左右,生成合成气H₂/CO体积比为1.5,并在58 h的实验中催化剂活性和稳定性良好。这主要归因于催化剂中金属和载体之间的强相互作用、催化剂的高热稳定性和强碱性。此外,较高的反应温度有利于甲烷三重整反应的进行;通过调节原料气组成,可以获得不同H₂/CO体积比的合成气。
- 甲烷 /
- 三重整 /
- 合成气 /
- Ni-Mg-ZrO₂催化剂
Abstract: Ni-ZrO₂ and Ni-Mg-ZrO₂ catalysts were prepared by a co-precipitation method, and then were characterized by BET, XRD, H₂-TPR and CO₂-TPD techniques. The performances of catalysts in the tri-reforming of coal bed methane to syngas were studied in a fixed bed reactor. The reaction conditions (temperature and feed gas composition) were mainly investigated. The results showed that at t=800℃, atmospheric pressure, CH₄/CO₂/H₂O/O₂/N₂=1.0/0.45/0.45/0.1/0.4, GHSV=30 000 mL/(g·h), about 99% of CH₄ conversion, 65% of CO₂conversion, and V_H₂/V_CO of 1.5 could be achieved during 58 h of reaction, which are related to the strong metal-support interaction, the good thermal stability and basic nature of the catalyst. Furthermore, high temperature favors the tri-reforming of methane. By adjusting the feed gas composition, a specific V_H₂/V_CO could be achieved.
- coal bed methane /
- tri-reforming /
- syngas /
- Ni-Mg-ZrO₂ catalyst

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参考文献(25)

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