高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (12): 2005.

• 论文 • 上一篇    下一篇

沸石载体结构对甲烷无氧芳构化性能的影响

李爽1, 张春雷1, 袁艺2, 彭艳兵2, 吴通好1, 张密林3, 林励吾3   

  1. 1. 吉林大学化学系, 长春, 130023;
    2. 哈尔滨工程大学化工系, 哈尔滨, 150001;
    3. 中国科学院大连化学物理研究所, 大连, 116023
  • 收稿日期:1997-12-10 出版日期:1998-12-24 发布日期:1998-12-24
  • 通讯作者: 张春雷.
  • 作者简介:李爽,女,25岁,博士研究生.
  • 基金资助:

    中国博士后科学基金及"九五"国家攀登计划基金资助课题.

Effects of Zeolite Structure on the Catalytic Performance of Catalysts for Methane Non-oxidative Aromatization

LI Shuang1, ZHANG Chun-Lei1, YUAN Yi2, PENG Yan-Bing2, WU Tong-Hao1, ZHANG Mi-Lin3, LIN Li-Wu3   

  1. 1. Department of Chemistry, Jilin University, Chang chun, 130023;
    2. Department of Chemical Engineering, Haerbin Engineering College, Haerbin, 150001;
    3. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023
  • Received:1997-12-10 Online:1998-12-24 Published:1998-12-24

摘要: 考察了担载MoO3的沸石催化剂上甲烷的无氧芳构化性能,并与沸石结构相关联.结果表明,孔径与苯分子动态直径相当的ZSM-5、ZSM-8、ZSM-11和β沸石等是甲烷无氧芳构化催化剂的良好载体,其中3%MoO3/HZSM-11具有最高的甲烷芳构化活性和稳定性,973K下的转化率和苯选择性分别为8.0%和90.9%;6%MoO3/HZSM-8与7%MoO3/H-β芳构化性能相当.以HMCM-41和HSAPO-34为载体时芳构化活性很低,以HMOR、HX和HY为载体时仅有少量乙烯生成,而以HSAPO-5和HSAPO-11为载体时未检测到烃类生成.

关键词: 沸石结构, 甲烷芳构化, MoO3, 苯, 择形催化作用

Abstract: The catalytic performance for methane aromatization in the absence of oxygen over various supported zeolite catalysts was studied on a continuous flow fixed bed reactor. It is found that H-form silica-alumina zeolites with two dimensional space structure, such as ZSM-5, ZSM-8 and ZSM-11 whose pore size is very near to the dynamic diameter of benzene (06 nm), are fine supports for methane aromatization, among which 3%MoO3/HZSM-11 possesed the highest activity and stability, the maximum conversion of methane and selectivity to benzene are 8.0% and 90.9% respectively. The catalytic performance of MoO3/HZSM-8 and 3%MoO3/H-β are relatively lower than that of 3%MoO3/ HZSM-5. The catalysts supported on HMCM-41 and HSAPO-34 have a very low activity for the reaction and over the catalysts of MoO3/HMOR, HX and HY only a small amount of ethylene is produced, while hydrocarbons have not been detected over the catalysts of MoO3/HSAPO-5 and MoO3/HSAPO-11.

Key words: Zeolite structure, Methane aromatization, MoO3, Benzene, Shape selective function

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