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KF promoted mesoporous γ-Al2O3 with strong basicity: Preparation, characterization and catalytic activitiy for transesterification to biodiesel

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Abstract

The present paper describes the preparation of KF/M-γ-Al2O3, efficient mesoporous solid bases. The procedure involves loading KF into a crystalline mesoporous γ-Al2O3 that was synthesized by the self-assembly of poly-4-vinylpyridine (P4VP) with Al3+ species. The synthesis is based on the strong acid-base interaction, hydrothermal treatment at 180°C and calcination at 550°C. Characterizations using XRD analysis and low temperature N2 adsorption indicated that different amounts of KF could be introduced into crystalline mesoporous γ-Al2O3 to obtain catalysts with high BET surface areas, large pore volumes and uniform pore size distribution. Based on SEM images, KF/M-γ-Al2O3 catalysts have rough surface character and a large nanopore volume. CO2-TPD curves registered for KF/M-γ-Al2O3 contain high temperature peaks, indicating strong basicity of the catalysts. Under the same reaction conditions KF/M-γ-Al2O3 catalysts exhibit much better activities for transesterification to biodiesel than KOH, NaOH, H2SO4, hydrotalcite and CaO. Enhanced activities appear to arise from strong basisity and large BET surface areas.

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Authors and Affiliations

  1. Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing, 312000, China

    Weiping Kong, Yudan Wang & Chenze Qi

  2. Zhejiang Zhenyuan Pharmaceutical Co., LTD, Shaoxing, 312000, China

    Xinyan Zheng & Weiming Fan

Authors
  1. Xinyan Zheng
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  2. Weiming Fan
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  3. Weiping Kong
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  4. Yudan Wang
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  5. Chenze Qi
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Correspondence to Weiping Kong or Chenze Qi.

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Published in Russian in Kinetika i Kataliz, 2014, Vol. 55, No. 5, pp. 621–627.

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Zheng, X., Fan, W., Kong, W. et al. KF promoted mesoporous γ-Al2O3 with strong basicity: Preparation, characterization and catalytic activitiy for transesterification to biodiesel. Kinet Catal 55, 592–598 (2014). https://doi.org/10.1134/S002315841405005X

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  • DOI: https://doi.org/10.1134/S002315841405005X

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