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Catalysis Letters

, Volume 129, Issue 1–2, pp 71–78 | Cite as

Effect of Calcination Temperature of Kaolin Microspheres on the In situ Synthesis of ZSM-5

  • Hui Feng
  • Chunyi Li
  • Honghong Shan
Article

Abstract

ZSM-5 zeolite has been successfully synthesized in-situ on calcined kaolin microspheres by the hydrothermal method using n-butylamine as a template. The supported ZSM-5 was characterized by X-ray diffraction and scanning electron microscopy. The effect of calcination temperature of kaolin microspheres on the in-situ synthesis of ZSM-5 was investigated. The influence of the pretreatment temperature on the properties of kaolin microspheres including phase transformation, amounts of active SiO2 and Al2O3, and pore structures, was studied using fourier transform infrared (FT-IR), nitrogen adsorption and chemical analysis. The results showed that when the calcination temperature increased from 300 to 900 °C, the amount of active SiO2 in the kaolin microspheres increased slightly and the amount of active Al2O3 initially increased rapidly and then decreased steadily. The surface area and pore volume of the kaolin calcined at both low and high temperatures was less than those of kaolin calcined at a medium temperature. The property changes of kaolin caused the relative crystallinity of in situ synthesized ZSM-5 to vary.

Keywords

Calcination temperature Kaolin microspheres In situ synthesis ZSM-5 

Notes

Acknowledgments

Financial support was provided by Petrochina Company under cooperative agreement 040806-01-00. The authors thank the Instrument Anaylisi Center at China University of Petroleum for the XRD, BET and FT-IR analysis.

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.State Key Laboratory of Heavy Oil ProcessingChina University of PetroleumDongyingChina
  2. 2.Chemical EngineeringUniversity of MichiganAnn ArborUSA

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