两阶段晶化合成复合分子筛

高等学校化学学报 ›› 2009, Vol. 30 ›› Issue (6): 1060.

两阶段晶化合成复合分子筛

张强¹, 崔秋凯², 李春义¹, 山红红¹, 杨朝合¹

1. 中国石油大学(华东)重质油国家重点实验室, 青岛 266555;
2. 中国石油天然气股份有限公司大港石化公司, 天津 300280

收稿日期:2009-01-08 出版日期:2009-06-10 发布日期:2009-06-10
通讯作者: 张强, 女, 博士, 讲师, 主要从事多相催化方面的研究. E-mail: girlzhangqiang@163.com
基金资助:
中国石油大学(华东)大型贵重精密仪器设备开放基金资助项目.

Composite Molecular Sieves Synthesized by Two-stage Crystallization

ZHANG Qiang¹*, CUI Qiu-Kai², LI Chun-Yi¹, SHAN Hong-Hong¹, YANG Chao-He¹

1. State Key Lab of Heavy Oil, China University of Petroleum, Qingdao, 266555, China;
2. Dagang Petrochemical Company, Petro China Co. Ltd., Tianjin 300280, China

Received:2009-01-08 Online:2009-06-10 Published:2009-06-10
Contact: ZHANG Qiang, E-mail: girlzhangqiang@163.com
Supported by:
中国石油大学(华东)大型贵重精密仪器设备开放基金资助项目.

摘要/Abstract

摘要：

采用低温与高温相结合的两阶段晶化方式合成了一系列ZSM-5(core)/SAPO-5(shell)双结构分子筛, 研究了合成条件对核壳结构分子筛的形成及性质的影响, 并采用X射线衍射、扫描电镜、X射线能量散射谱、红外光谱及N₂静态吸附等手段对样品进行表征. 实验结果表明, 与直接高温晶化相比, 两阶段晶化方式在短晶化时间内合成的复合材料中SAPO-5的结晶度较低, 而合成纯SAPO-5分子筛的结晶度却明显较高; 两阶段晶化的方式能适当促进核壳结构型复合分子筛的形成, 减少SAPO-5的独立生长.

关键词: 核壳结构分子筛, ZSM-5, SAPO-5, 两阶段晶化

Abstract:

ZSM-5(core)/SAPO-5(shell) binary structure composite molecular sieves were synthesized by two-stage varying-temperature syntheses, which includes the lower first-stage temperatures and higher second-stage temperatures. The effect of syntheses conditions on the formation and character of core/shell structure zeolite was investigated. These synthesized samples were characterized by XRD, SEM, EDS, FTIR and N₂-adsorption, respectively. In result, compared with the direct high temperature method, the crystallinity of SAPO-5 in composite is lower and that of alone SAPO-5 zeolite is higher by two-stage varying-temperature syntheses at shorter time. So two-stage varying-temperature syntheses can improve the formation core-shell structure zeolies, reduce amounts of self-existent SAPO-5 zeolite.

Key words: Core-shell binary structure zeolite, ZSM-5, SAPO-5, Two-stage crystallization

中图分类号:

O614
O643

TrendMD:

张强, 崔秋凯, 李春义, 山红红, 杨朝合. 两阶段晶化合成复合分子筛. 高等学校化学学报, 2009, 30(6): 1060.

ZHANG Qiang*, CUI Qiu-Kai, LI Chun-Yi, SHAN Hong-Hong, YANG Chao-He. Composite Molecular Sieves Synthesized by Two-stage Crystallization. Chem. J. Chinese Universities, 2009, 30(6): 1060.

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