化工进展

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固体酸WO3/ZrO2催化果糖脱水合成5-羟甲基糠醛

刘彦丽,王福余,王崇,赵振波   

  1. 长春工业大学化学与生命科学学院,吉林 长春 130012
  • 出版日期:2014-01-05 发布日期:2014-01-05

WO3/ZrO2 for fructose dehydration to 5-hydroxymethylfurfural as a solid acid catalyst

LIU Yanli,WANG Fuyu,WANG Chong,ZHAO Zhenbo   

  1. School of Life Sciences and Chemistry,Changchun University of Technology,Changchun 130012,Jilin,China
  • Online:2014-01-05 Published:2014-01-05

摘要: 用共沉淀-热回流处理法制备了系列WO3/ZrO2固体酸催化剂,通过调节W与Zr的摩尔比优化其对果糖脱水制备5-羟甲基糠醛(5-HMF)的催化活性。利用X射线衍射(XRD)、N2吸脱附、氨气程序升温脱附(NH3-TPD)对材料的结构和酸性质进行了表征,并在以二甲基亚砜(DMSO)为溶剂、果糖为原料的催化体系中,考察催化剂的用量、反应时间、反应温度等对5-HMF收率的影响。研究发现,热回流处理大大增加了样品的比表面积,增强了样品的酸强度,当n(W)∶n(Zr)=0.1∶1时,样品比表面积最大,催化活性最好,以其为催化剂,在130 ℃下反应3 h条件下,5-HMF收率最高可达80.29%。

关键词: WO3/ZrO2, 固体酸, 果糖, 5-羟甲基糠醛

Abstract: Catalytic dehydration of fructose to 5-hydroxymethylfurfural (5-HMF) was studied and improved by synthesizing series of solid acid catalyst WO3/ZrO2 with different mole ratio of W to Zr using co-precipitation with hot reflux method. The structure and properties of the catalysts thus synthesized were investigated by X-ray diffraction(XRD),N2 sorption,temperature -programmed desorption of (NH3-TPD),and then the influence of temperature,mass ration of fructose/catalyst and reaction time on the yield of 5-HMF from fructose were studied in dimethyl sulfoxide. These studies showed that specific surface area and acid strength of the catalysts were increased greatly by hot reflux method,and an optimized 5-HMF yield of 80.29% was obtained with 3 h at 130 ℃ in the presence of the sample WO3/ZrO2 with W-Zr mole ratio of 0.1∶1,which had a largest specific surface area and best catalytic activity.

Key words: tungsten trioxide/zirconium dioxide, solid acid, fructose, 5-hydroxymethylfurfural

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