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日用化学工业（中英文）

日用化学工业 ›› 2017, Vol. 47 ›› Issue (7): 379-383.doi: 10.13218/j.cnki.csdc.2017.07.005

• 开发与应用 • 上一篇    下一篇

利用双头季铵盐合成特殊形貌的EU-1分子筛及其催化性能

高李霞1, 李晓峰1, 高萌1, 刘晓臻1, 李国栋1, 窦涛1,2   

  1. 1.太原理工大学 精细化工研究所,山西 太原 030024;
    2.中国石油大学 CNPC催化重点实验室,北京 102249
  • 收稿日期:2017-02-27 发布日期:2019-03-20
  • 通讯作者: 李晓峰,副教授,博士,电话:(0351)6014915,E-mail:lixiaofeng6008@163.com。
  • 作者简介:高李霞(1991-),女,山西运城人,硕士研究生,电话:15735161213,E-mail:648393375@qq.com。
  • 基金资助:
    国家科技型中小企业技术创新项目(14C26211400552)

Synthesis of EU-1 zeolites with special morphology using double-headed quaternary ammonium salt and their catalytic performance

GAO Li-xia1, LI Xiao-feng1, GAO Meng1, LIU Xiao-zhen1, LI Guo-dong1, DOU Tao1,2   

  1. 1.Institute of Special Chemicals,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;
    2.CNPC Key Laboratory of Catalysis,China University of Petroleum,Beijing 102249,China
  • Received:2017-02-27 Published:2019-03-20

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摘要： 以双头季铵盐C18-6-6Br2为辅助模板剂,分别通过水热法和蒸汽相法合成了具有特殊形貌的EU-1分子筛。利用XRD、SEM、NH3-TPD和N2吸附-脱附等手段对样品进行表征,使用二甲苯异构化作为探针反应进行催化性能评价。结果表明:双头季铵盐C18-6-6Br2的加入可明显改变EU-1分子筛的形貌,尤其在蒸汽相条件下作用效果更为显著,合成的EU-1分子筛形貌呈蜂巢形,同时其强酸量和弱酸量下降,总比表面积和总孔体积分别增加了83.65%和126.72%,二甲苯异构化反应中对二甲苯(PX)收率、选择性(Y(C8))和催化活性([PX]/ΣX)均显著提高,分别增加了8.94%,6.44%和6.01%。

关键词: 双头季铵盐, EU-1分子筛, 水热法, 蒸汽相法, 二甲苯异构化

Abstract: Using double-headed quaternary ammonium salt C18-6-6Br2 as the assistant template,the EU-1 zeolites with special morphology were synthesized with hydrothermal method and vapor phase method.The product samples were characterized by XRD,SEM,NH3-TPD and N2 adsorption-desorption.Besides,xylene isomerization was used as the probe reaction to evaluate their catalytic performance.Results show that the addition of the double-headed quaternary ammonium salt C18-6-6Br2 can effectively change the morphology of the product,especially in the case of vapor phase method.The morphology of EU-1 zeolite synthesized by adding C18-6-6Br2 in the steam phase shows honeycomb,and both its strong acid content and weak acid content decrease.The total specific surface area and the total pore volume increases by 83.65% and 126.72% respectively.The yield of xylene (PX),the selectivity (Y(C8)) and the catalytic activity ([PX]/ΣX) significantly increases by 8.94%,6.44% and 6.01% respectively in the xylene isomerization reaction.

Key words: double-headed quaternary ammonium salt, EU-1 zeolites, hydrothermal method, vapor phase method, xylene isomerization

中图分类号: 

  • TQ423.1