Synthesis and Characterization of ZSM-5/EU-1 Composite Zeolite with Core-shell Structure by One Step

被引：3

作者：

Li Jian-Hua ^{[1
]}

Yang Dong-Hua ^{[1
]}

Lv Ai-Ning ^{[1
]}

Ma Cun-Cun ^{[1
]}

Li Xiao-Feng ^{[1
]}

Dou Tao ^{[1
,2
]}

机构：

[1] Taiyuan Univ Technol, Coll Chem & Chem Engn, Taiyuan 030024, Peoples R China

[2] China Univ Petr, Coll Chem Engn, CNPC Key Lab Catalysis, Beijing 102249, Peoples R China

来源：

JOURNAL OF INORGANIC MATERIALS | 2016年 / 31卷 / 05期

基金：

中国国家自然科学基金;

关键词：

core-shell zeolite; ZSM-5/EU-1; multiple porous; acidity; CATALYSTS; SITES;

D O I：

10.15541/jim20150511

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

ZSM-5/EU-1 core-shell intergrowth composite zeolite was synthesized by one-step crystallization method based on dual-template and appropriate citric acid addition. The properties of core-shell zeolite were characterized by XRD, TEM, FT-IR, NH3-TPD, etc. The results showed that there were ZSM-5 and EU-1 zeolite crystalline phases formed in the core-shell zeolite, as EU-1 overgrowing around ZSM-5 surface defects. The synthetic sample composed of microporous and mesoporous multiple porous composite zeolite, with micropore diameter of 0.94 nm. The core-shell structure increased strong acid content and improved its acidity as compared with the single zeolite. Based on the investigation of citric acid addition and crystallization time influence on the structure and Zeta potential of core- shell zeolite, the optimum condition of core-shell intergrowth was as follows, i.e.n(citrate)/n(Al2O3)=0.8-1.2 and crystallization time of 72-96 h. And the possible growth process of core- shell zeolite was proposed.

引用

页码：492 / 498

页数：7

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