高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (3): 449.

• 论文 • 上一篇    下一篇

铁硅酸盐分子筛乙苯氧化脱氢催化性能研究──平衡阳离子性质及水热处理对反应活性的影响

张春雷, 吴志芸, 阚秋斌   

  1. 吉林大学化学系, 长春 130023
  • 收稿日期:1994-05-31 修回日期:1994-09-25 出版日期:1995-03-24 发布日期:1995-03-24
  • 通讯作者: 张春雷,男,26岁,博士研究生.
  • 作者简介:张春雷,男,26岁,博士研究生.
  • 基金资助:

    国家自然科学基金

Studies on Catalysis of Ferrosilicates for OxidationDehydrogenation of Ethylbenzene ──Effect of Exchanged Cations and Hydrothermal Treatment on Actlvity

ZHANG Chun-Lei, WU Zhi-Yun, KAN Qiu-Bin   

  1. Department of Chemistry, Jilin University, Changchun 130023
  • Received:1994-05-31 Revised:1994-09-25 Online:1995-03-24 Published:1995-03-24

摘要: 在823K和乙苯/O2=1.0的条件下考察了乙苯在FeZSM-5上的催化活性。比较了平衡阳离子性质、水热处理及Fe2O3的分散程度对乙苯氧化脱氢性能的影响。结合XPS、ESR及TPR测试结果讨论了FeZSM-5中铁的存在状态与乙苯氧化脱氢的关系。结果表明,FeZSM-5催化剂上作为L酸中心的骨架Fe(Ⅲ)、水热处理产生的高分散非骨架Fe(Ⅲ)和适当强度的碱中心共同构成了乙苯氧化脱氢活性中心。

关键词: 铁硅酸盐沸石, 碱金属阳离子, 乙苯氧化脱氢, 水热处理, 活性中心

Abstract: The catalytic activity and selectivity of FeZSM-5 catalysts for oxidation-dehydrogenation of ethylbenzene(EB) were examined at 823K and EB:O2=1. 0. The influence of exchanged cations, hydrothermal treatment and dispersity of Fe2O3on oxidation-dehydrogenation activity of EB over FeZSM-5 was also studied. XPS, ESR and TPR techniques were used for the determination of states and properties of iron in FeZSM-5. The results indicate that framework iron and highly dispersed nonframework iron used as Lewis acidic sites and basic sites with suitable strength construct the active centers of EBoxidation-dehydrogenation.

Key words: FeZSM-5, Alkali cation, Oxidation-dehydrogenations of ethylbenzene, Hydrothermal treatment, Active centers

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