Chinese Journal of Catalysis ›› 2014, Vol. 35 ›› Issue (5): 723-732.DOI: 10.1016/S1872-2067(14)60071-1

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Facile preparation of Sn-β zeolites by post-synthesis (isomorphous substitution) method for isomerization of glucose to fructose

Min Liua, Songyan Jiab, Changzeng Lia, Anfeng Zhanga, Chunshan Songa,c,d, Xinwen Guoa   

  1. a State Key Laboratory of Fine Chemicals, Department of Catalysis Chemistry and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, Liaoning, China;
    b Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    c EMS Energy Institute, PSU-DUT Joint Center for Energy Research and Department of Energy & Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States;
    d Department of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
  • Received:2014-02-27 Revised:2014-03-10 Online:2014-04-18 Published:2014-04-24
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (20803005, 21306186).

Abstract:

Sn-β zeolites were facilely synthesized by a post-synthesis method consisting of two steps, i.e., heteroatom removal and isomorphous substitution by reaction with SnCl4. This significantly shortened the Sn-β zeolite preparation time from the previously reported 40 d to less than 1 d. It was shown that Sn-β samples prepared using the post-synthesis method had higher Sn contents than that prepared using a hydrothermal method. The as-synthesized Sn-β zeolites were tested in the isomerization of glucose to fructose in aqueous media. The effects of reaction temperature, reaction time, catalyst amount, solvent, and halide additive on the isomerization reaction over Sn-Al-β zeolites were studied in detail. Under the optimized conditions, the yield of fructose reached a maximum of ~43%. The catalysts can be reused without loss of activity after regeneration by calcination.

Key words: Sn-β, Isomorphous substitution, Glucose, Isomerization, Fructose