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Chemistry and Industry of Forest Products ›› 2014, Vol. 34 ›› Issue (2): 1-8.doi: 10.3969/j.issn.0253-2417.2014.02.001

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Preparation and Characterization of Amine Grafted SBA-15 Catalysts and Their Application in Aldol Condensation Reaction

REN Hong-qing1 2, XIE Jian-jun2, LIU Hua-cai2, YIN Xiu-li2, WU Chuang-zhi2   

  1. 1. Department of Thermal Science & Energy Engineering, University of Science and Technology of China, Hefei 230026, China;
    2. Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
  • Received:2013-04-08 Online:2014-04-25 Published:2014-04-26

Abstract: Solid basic catalysts were synthesized by post-grafting four different organic amines, i.e. primary amine(PA), secondary amine(SA), tertiary amine(TA) and piperazidine(PP) to mesoporous SBA-15.The samples were characterized by X-ray diffraction, nitrogen adsorption, thermogravimetric analysis, scanning electron microscopy and elemental analysis. The activity of prepared catalysts was tested in aldol condensation reaction of bio-oil model compounds (furfural and acetone). The influence of graft reaction conditions, different functional groups of amine, solvents and temperature on conversion of furfural and selectivity of FA and F2A were investigated. The results indicated that the prepared samples retain excellent ordered mesoporous structure with the amino loading at 0.6-1.0 mmol/g. The catalytic activity increased when strict N2-pretected grafting condition, protic solvent and higher temperature were used. The catalyst containing primary amine (N2-pretected grafting condition) shows the best catalytic activity. The highest conversion of furfural (82.6%) and product selectivity of FA (41.4%) and F2A(8.7%) can be achieved after reaction at 80 ℃ for 8 h in H2O solvent.

Key words: bio-oil, SBA-15, aldol condensation, amine, post-grafting

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