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Synthesis of ZSM-5 on kaolin microspheres in the absence of an organic amine template

Published online by Cambridge University Press:  09 July 2018

S.-H. Sun ,
J.-T. Ma  and
X.-H. Gao
S.-H. Sun
Affiliation:
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P R China Petrochemical Research Institute, Lanzhou Petrochemical Company, PetroChina, Lanzhou 730060, P R China
J.-T. Ma*
Affiliation:
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P R China
X.-H. Gao
Affiliation:
Petrochemical Research Institute, Lanzhou Petrochemical Company, PetroChina, Lanzhou 730060, P R China
*
*E-mail: sunshuhong@netease.com
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Abstract

Zeolite ZSM-5 was synthesized successfully, in situ, on pyrokaolin microspheres (PKM) under hydrothermal conditions, without the use of an organic amine template. The utility of alkali-modified pyrokaolin microspheres (AMKM) was also evaluated. The resulting products were characterized using X-ray diffraction, scanning electron microscopy (SEM) and N2-adsorption isotherm data. The material containing ZSM-5 synthesized from the system PKM-additional silica-water had a large surface area and pore volume with significant enhancements in the micropore surface area and micropore volume. The SEM images show that the synthesis of zeolite ZSM-5 from pyrokaolin microspheres (PKM) led to the formation of polycrystalline aggregates <2 μm in size. The purity of the zeolite ZSM-5 produced was affected by both the pH value of the reactant system and the reaction temperature. In the system containing AMKM-additional silica-water, very little of the synthesized zeolite resided on the kaolin microspheres.

Keywords

organic amine templatekaolin microspheresZSM-5zeolitesynthesis
Type
Research Article
Information
Clay Minerals , Volume 42 , Issue 2 , June 2007 , pp. 203 - 211
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2007

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