作　　者： ; ; ; ;

机构地区： 广西科学院

出　　处： 《可再生能源》 2012年第6期50-53,58,共5页

摘　　要： 5-羟甲基糠醛(5-HMF)是一种重要的化工中间体,具有非常广泛的应用价值和市场前景。在CO2-高温液态水体系下,探讨了二氧化碳初始压力、反应温度以及果糖初始浓度等因素对果糖制备5-HMF的影响。结果表明,CO2-高温液态水催化体系对果糖脱水分解制备5-HMF具有较高的催化活性,在果糖初始浓度高达10%时也可获得较好的5-HMF收率。在果糖浓度为3%,CO2压力为5.0 MPa,160℃的条件下反应100 min,5-HMF的收率为54.3%,反应生成5-HMF的选择性高达57.7%,催化活性为无CO2的高温液态水的2～3倍。CO2压力对果糖分解制备5-HMF有重要影响,随着体系中CO2压力的增加,5-HMF的收率也逐渐增加,但生成5-HMF的选择性有所下降。 5-Hydroxymethylfurfural （5-HMF）is a kind of important chemical intermediates which has wide application value and market prospect. The initial CO2 pressure, reaction temperature and initial fructose concentration were discussed for the influence on the reaction of fructose dehydration to 5-hydroxymethylfurfural under CO2-high temperature liquid water system. The results indi- cated that CO2-high temperature liquid water catalytic system exhibited high catalyst activity on fructose dehydration to 5-hydroxymethylfurfural, good recovery of 5-HMF was obtained even the initial fructose concentration up to 10%. Yield of 5-HMF and selectivity generation of 5-HMF ware respectively 54.3% and 57.7%,under the condition of 5 MPa CO2 pressure, 160 ℃, and 100 minutes in 3% initial fructose concentration, and catalyst activity was 2-3 times comparing to high temperature liquid water which does no exist CO2. The reaction of fructose dehydration to 5-hydroxymethylfurfural was remarkably influenced by CO2 pressure. With the increase of CO2 pressure, the yield of 5-HMF increased, but the selectivity generation to 5-HMF decreased.

关 键 词： 果糖 羟甲基糠醛 二氧化碳 生物质能源

领　　域： [动力工程及工程热物理] [农业科学] [农业科学]