高等学校化学学报

高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (3): 392.

• 研究论文 • 上一篇    下一篇

硅铁ZSM-5催化剂上乙苯分子的吸附作用和表面反应

阚秋斌1, 吴志芸1, 于吉红1, 彭少逸1, 徐奕德2, 熊国兴2, 黄家生2   

  1. 1. 吉林大学化学系, 长春 130023;
    2. 中国科学院大连化学物理研究所
  • 收稿日期:1992-06-02 修回日期:1992-09-15 出版日期:1993-03-24 发布日期:1993-03-24
  • 通讯作者: 吴志芸
  • 基金资助:

    国家自然科学基金;国家催化基础研究实验室资助

Adsorption and Surface Reaction of Ethylbenzene over Ferrosilicate with FeZSM-5 Structure

KAN Qiu-Bin1, WU Zhi-Yun1, YU Ji-Hong1, PENG Shao-Yi1, XU Yi-De2, XIONG Guo-Xing2, HUANG Jia-Sheng2   

  1. 1. Department of Chemistry, Jilin University, Changehun, 130023;
    2. Dalian Institute of Physical Chemistry, Academia Sinica, Dalian
  • Received:1992-06-02 Revised:1992-09-15 Online:1993-03-24 Published:1993-03-24

PDF (PC)

被引次数

2

摘要： 运用X光电子能谱、顺磁共振及穆斯堡尔谱研究了FeZSM-5沸石催化剂上乙苯的吸附及与催化剂的相互作用。沸石中骨架铁能与吸附的乙苯分子发生较强的相互作用。使Fe2,电子结合能产生较大的低能位移;乙苯分子可以络合配位在沸石骨架中配位不饱和的Fe(Ⅲ)上,引起对应铁的顺磁信号和穆斯堡尔参数的变化,利用程序升温脱附和表面反应技术,通过考察吸附乙苯在FeZSM-5催化剂上的脱附和反应,进一步揭示了FeZSM-5乙苯脱氢催化活性中心的性质.

关键词: ZSM-5, 硅铁沸石, 吸附, 程序升温脱附

Abstract: XPS, ESRand Mossbauer techniques were used to investigate the adsorption of ethylbenzene over FeZSM-5 zeolite catalyst.Astronger interaction between ethylbenzene and framework iron of FeZSM-5 is found, which results in a 0.7 eVchemical shift of Fe2, binding energy towards a low value.Ethylbenzene molecule acting as a ligand could coordinate with the framework iron with coordination unsaturation to form a chemical bond.The study on the temperature programmed desorption and the surface reaction of ethylbenzene over FeZSM-5 further characterizes the catalytic active centers for ethylbenzene reactions.

Key words: ZSM-5, Ferrosilicate zeolite, Adsorption, Temperature programmed desorption

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