混合钴源对Co-Pd/TiO2催化剂催化CH4-CO2两步梯阶转化法合成乙酸的性能影响

doi:10.3969/j.issn.0251-0790.2012.01.027

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (01): 158.doi: 10.3969/j.issn.0251-0790.2012.01.027

混合钴源对Co-Pd/TiO₂催化剂催化CH₄-CO₂两步梯阶转化法合成乙酸的性能影响

高仲良, 黄伟, 阴丽华, 吉鹏, 赵金珍, 刘源, 彭芬

太原理工大学煤化工研究所, 煤科学与技术教育部和山西省重点实验室, 太原 030024

收稿日期:2011-03-08 出版日期:2012-01-10 发布日期:2011-12-20
通讯作者: 黄伟,男,博士,教授,主要从事C1化学与化工研究.E-mail:huangwei@tyut.edu.cn E-mail:huangwei@tyut.edu.cn
基金资助:
国家"九七三"计划项目(批准号: 2005CB221204)和国家自然科学基金(批准号: 20676085)资助.

Catalytic Performances of Co-Pd/TiO₂ Catalysts Prepared with Mixed Cobalt Salts for Acetic Acid Synthesis from CH₄ and CO₂ by a Step-wise Reaction Sequence

GAO Zhong-Liang, HUANG Wei, YIN Li-Hua, JI Peng, ZHAO Jin-Zhen, LIU Yuan, PENG Fen

Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Institute of Coal Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Received:2011-03-08 Online:2012-01-10 Published:2011-12-20
Contact: Wei HUANG E-mail:huangwei@tyut.edu.cn

摘要/Abstract

摘要： 以混合钴源为前驱体, 采用等体积浸渍法制备了Co-Pd/TiO₂催化剂, 考察了其对CH₄和CO₂梯阶转化直接合成乙酸的催化性能, 采用XRD, XPS, NH₃-TPD和BET对催化剂进行了表征. 结果表明, 催化剂具有适宜的表面酸性、高比表面积和孔结构, 有利于提高催化剂的活性. 在m(CoCl₂)∶m=2∶5, m(Co)∶m(Pd)=2∶1, 常压, 150 ℃条件下, 乙酸的生成速率达到6.13 mg·g^-1Cat·h^-1, 选择性达到 81.6%, 分别比以单一Co源制备的催化剂提高了134%和16%.

关键词: 混合钴源, Co-Pd/TiO₂ 催化剂, CH₄-CO₂两步梯阶转化法, 乙酸

Abstract: Co-Pd/TiO₂ catalysts were prepared from mixed cobalt salts by incipient impregnation method. The catalytic performance of the catalysts for direct synthesis of acetic acid from CH₄ and CO₂ by a step-wise reaction technology was investigated. These catalysts were also characterized by XRD, XPS, NH₃-TPD and BET. The results show that when the precursor is from mixed cobalt salts, a suitable surface acidity, high specific surface area and pore structure are formed, which favors the activity of catalysts. On the condition of m(CoCl₂)∶m=2∶5, m(Co)∶m(Pd)=2∶1 and 150 ℃, the formation rate and selectivity of acetic acid reach 6.13 mg·g^-1Cat·h^-1and 81.6%, respectively. Compared with the catalysts prepared from single cobalt, the rate and selectivity increase by 134% and 16%.

Key words: Mixed cobalt salts, Co-Pd/TiO₂ catalyst, CH₄-CO₂ step-wise reaction, Acetic acid

中图分类号:

O643

TrendMD:

高仲良, 黄伟, 阴丽华, 吉鹏, 赵金珍, 刘源, 彭芬. 混合钴源对Co-Pd/TiO₂催化剂催化CH₄-CO₂两步梯阶转化法合成乙酸的性能影响. 高等学校化学学报, 2012, 33(01): 158.

GAO Zhong-Liang, HUANG Wei, YIN Li-Hua, JI Peng, ZHAO Jin-Zhen, LIU Yuan, PENG Fen. Catalytic Performances of Co-Pd/TiO₂ Catalysts Prepared with Mixed Cobalt Salts for Acetic Acid Synthesis from CH₄ and CO₂ by a Step-wise Reaction Sequence. Chem. J. Chinese Universities, 2012, 33(01): 158.

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混合钴源对Co-Pd/TiO₂催化剂催化CH₄-CO₂两步梯阶转化法合成乙酸的性能影响

Catalytic Performances of Co-Pd/TiO₂ Catalysts Prepared with Mixed Cobalt Salts for Acetic Acid Synthesis from CH₄ and CO₂ by a Step-wise Reaction Sequence

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