高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (9): 1535.

• 研究论文 • 上一篇    下一篇

甲烷无氧芳构化催化剂的活性相生成研究

马丁, 苏玲玲, 舒玉瑛, 徐奕德, 包信和   

  1. 中国科学院大连化学物理研究所, 催化基础国家重点实验室, 大连 116023
  • 收稿日期:2000-07-05 出版日期:2001-09-24 发布日期:2001-09-24
  • 通讯作者: 包信和(1959年出生),男,博士,研究员,博士生导师,从事催化和表面化学研究.E-mail:xhbao@dicp.ac.cn E-mail:xhbao@dicp.ac.cn
  • 基金资助:

    国家重点基础研究发展规划项目(G1999022400)资助

Formation of Active Phase of the Catalyst for the Reaction of Methane Aromatization

MA Ding, SU Ling-Ling, SHU Yu-Ying, XU Yi-De, BAO Xin-He   

  1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
  • Received:2000-07-05 Online:2001-09-24 Published:2001-09-24

摘要: 利用在线质谱分析检测了在各种催化剂上甲烷的程序升温表面反应(TPSR)过程中不同物种的行为.结果表明,MoO3向Mo2C的转变阻碍了甲烷的活化及其芳构化.如果这个转变过程在TPSR反应前发生,甲烷活化和苯生成的温度将大大降低(分别为760K和847K).通过比较担载在不同分子筛上钼物种的催化行为发现,甲烷的初始活化是这个反应速率的决定步骤.只有具备合适的钼价态,Bro-nsted酸性以及特殊的分子筛孔道结构的催化剂才能使甲烷芳构化反应高效进行.

关键词: 甲烷芳构化, 诱导期, Mo2C, MCM-22, ZSM-5, TPSR

Abstract: The behavior of different species during the temperature programmed surface reaction (TPSR) of methane over various catalysts is traced by an on line mass spectrometer. It is demonstrated that the transformation of MoO3 to molybdenum carbide hinders the activation of methane as well as the succeeding aromatization in the TPSR. If this transformation process is done before the reaction, the temperature needed for methane activation and benzene formation will be greatly lowered(760 Kand 847 K, respectively). It is strongly suggested that molybdenum carbide is one of the active center of this catalytic process.

Key words: Methane aromatization, Induction period, Molybdenum carbide, MCM22, ZSM5, TPSR

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