催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (3): 418-427.DOI: 10.1016/S1872-2067(10)60177-5

• 研究论文 • 上一篇    下一篇

介孔-微孔复合材料的水热稳定性及其催化裂化性能

韩伟, 贾玉心, 熊国兴, 杨维慎   

  1. 中国科学院大连化学物理研究所催化基础国家重点实验室, 辽宁大连 116023
  • 收稿日期:2010-04-30 修回日期:2010-11-26 出版日期:2011-03-04 发布日期:2014-08-01

Hydrothermal Stability of Meso-microporous Composites and Their Catalytic Cracking Performance

HAN Wei, JIA Yuxin, XIONG Guoxing*, YANG Weishen*   

  1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2010-04-30 Revised:2010-11-26 Online:2011-03-04 Published:2014-08-01

PDF

1072

被引次数

18

摘要： 采用无模板剂的溶胶凝胶法 制备了一系列具有均一介孔和 MFI 沸石微孔的复合材料. 与 MCM-41 相比, 包含 silicalite-1 沸石结构的复合材料的水热稳定性得到显著改善. 1,3,5-三异丙苯的催化裂化反应结果表明, 与商品 HZSM-5 沸石相比, 包含 ZSM-5 沸石结构的复合材料具有更高的催化活性和抗积炭性能. 三异丙苯的转化率和裂化产物的分布主要取决于介孔-微孔复合材料的介孔孔径, 较小的介孔孔径有利于提高转化率和生成更多小分子裂化产物.

关键词: 介孔-微孔复合材料, MFI 沸石, 水热稳定性, 1,3,5-三异丙苯, 催化裂化

Abstract: Meso-microporous composites show great promise for catalysis because of their variously-sized porous structures. A series of composites containing uniform mesopores and MFI zeolitic channels were prepared by a template-free sol-gel method. The composite containing silicalite-1 structures was found to be much more hydrothermally stable than MCM-41. The composites with ZSM-5 structures showed higher catalytic activity and resistance to deactivation than commercial HZSM-5 in the catalytic cracking reaction of 1,3,5-triisopropylbenzene. The conversion and catalytic cracking product distribution of 1,3,5-triisopropylbenzene depended highly on the mesopore size of the composites. Higher conversions and small molecule cracking products were obtained using composites with smaller mesopores.

Key words: meso-microporous composite, MFI zeolite, hydrothermal stability, 1,3,5-triisopropylbenzene, catalytic cracking