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2009 , Vol. 24 >Issue 2: 325 - 329

DOI: https://doi.org/10.3724/SP.J.1077.2009.00325

研究论文

两步晶化法制备MCM-48/ZSM-5复合分子筛

  • 周志华 ,
  • 鲁金明 ,
  • 巫树锋 ,
  • 周敬林 ,
  • 王金渠
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  • 大连理工大学 精细化工国家重点实验室，吸附与无机膜研究所， 大连 116012

收稿日期: 2008-05-14

  修回日期: 2008-09-19

  网络出版日期: 2009-03-20

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Synthesis of MCM-48/ZSM-5 Composite Molecular Sieve by Two-step Crystallization

  • ZHOU Zhi-Hua ,
  • LU Jin-Ming ,
  • WU Shu-Feng ,
  • ZHOU Jing-Lin ,
  • WANG Jin-Qu
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  • Institute Adsorption & Inorganic Membrane, State Key Laboratory Fine Chemistry, Dalian University and Technology, Dalian 116012, China

Received date: 2008-05-14

  Revised date: 2008-09-19

  Online published: 2009-03-20

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摘要

利用两步晶化法制备了高水热稳定性的MCM48/ZSM-5介微孔复合分子筛.通过SEM、TEM、XRD、IR和N2吸附脱附进行表征，结果显示，该材料的结构不同于简单的机械混合，而是具有微孔孔壁和三维立方介孔孔道的复合材料，其孔道尺寸为2.6nm左右.该复合分子筛在沸水中处理6h后，介孔结构仍保留完好.通过考察晶化时间对复合分子筛的影响，证明了介孔和微孔的组装是一个竞争的过程，复合分子筛中介孔与微孔结构的比例随晶化时间的变化而变化，且具有介孔孔道和微孔孔壁的复合分子筛150℃的最优晶化时间为8h.

关键词： MCM-48/ZSM-5; 介孔-微孔复合分子筛; 晶化时间; 水热稳定性; 两步晶化法

本文引用格式

周志华 , 鲁金明 , 巫树锋 , 周敬林 , 王金渠 . 两步晶化法制备MCM-48/ZSM-5复合分子筛[J]. 无机材料学报, 2009 , 24(2) : 325 -329 . DOI: 10.3724/SP.J.1077.2009.00325

Abstract

Composite micro/mesoporous MCM-48/ZSM-5 materials were successfully prepared by using a twostep synthesis route. The different structures of composite materials compared with the mechanical mixture were characterized by powder XRD，IR spectroscope，SEM，TEM，N2 adsorption and the influence of the crystallization time was investigated. The results show that the composite MCM-48/ZSM-5 materials possess mesoporous wall constructed by secondary building units characteristic of ZSM-5 and threedimensional pore structure with pore size of about 2.6nm. The mesoporous framework of MCM-48/ZSM-5 is still found to be somewhat preserved after treatment in boiling water for 6h. It is proved that the selfassemble is a competitive process and the ratio of mesopore to micropore has a close relationship with crystallization time. The optimum crystallization time under 150℃ is 8h.

Key words： MCM-48/ZSM-5; composite micro/mesoporous molecular seives; crystallization time; hydrothermal stability; two-step synthesis

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