石油炼制与化工 ›› 2020, Vol. 51 ›› Issue (1): 37-42.

• 催化剂 • 上一篇    下一篇

镁、铈复合改性的多级孔ZSM-5分子筛在苯和甲醇烷基化中的应用

闻振浩1,刘澄虎1,赵悌军2,朱化雨1,朱学栋3   

  1. 1. 临沂大学化学化工学院
    2. 临沂市泰尔化工科技有限公司
    3. 华东理工大学化学工程联合国家重点实验室
  • 收稿日期:2019-05-29 修回日期:2019-08-03 出版日期:2020-01-12 发布日期:2020-01-19
  • 通讯作者: 闻振浩 E-mail:871473249@qq.com
  • 基金资助:
    山东省自然科学基金

MODIFICATION OF HIERARCHICAL ZSM-5 ZEOLITE WITH Mg AND Ce FOR METHYLATION OF BEZENE AND METHNOL

    

  1.  
  • Received:2019-05-29 Revised:2019-08-03 Online:2020-01-12 Published:2020-01-19
  • Supported by:
     

摘要: 以硝酸镁、硝酸铈为前躯物,考察镁单独改性和镁、铈复合改性对多级孔ZSM-5分子筛催化苯和甲醇烷基化反应性能的影响,并以镁、铈复合改性的多级孔ZSM-5分子筛为催化剂,考察工艺条件对苯和甲醇烷基化反应的影响。结果表明,在反应温度为773 K、质量空速为8 h-1、反应压力为0.18 MPa,n(甲醇)/n(苯)= 0.9的条件下,多级孔ZSM-5分子筛通过镁、铈复合改性后,苯的转化率达到51%以上,甲苯、二甲苯的选择性达到90%以上。寿命试验表明该催化剂连续运行400 h,稳定性良好,具有优良的工业应用价值。

关键词: 苯, 甲醇, 烷基化, ZSM-5分子筛

Abstract: The influence of magnesium and cerium composite modification of hierarchical porous ZSM-5 on methylation of benzene with methanol was investigated. Magnesium nitrate and cerium nitrate were used as precursors. The effects of process conditions of the methylation were studied over the modified ZSM-5 catalyst. The results showed that at the conditions of 773K, 0.18 MPa, WHSV of 8 h-1, n(methanol)/n(benzene)= 0.9, the conversion rateof benzene was 51%, and the selectivity of toluene and xylene was greater than 90% over the Mg and Ce modified hierarchically ZSM-5. After 400 hours on stream, the catalysts still exhibited excellent stability, indicating its excellent industrial application value.

Key words: benzene, methanol, alkylation, ZSM-5 zeolite

中图分类号: