Efficient dehydration of fructose into 5-hydroxymethylfurfural in aqueous medium over silica-included heteropolyacids
Efficient dehydration of fructose into 5-hydroxymethylfurfural in aqueous medium over silica-included heteropolyacids
复制标题
在水介质中通过含二氧化硅的杂多酸将果糖有效脱水为 5-羟甲基糠醛
DOI：
10.1016/j.jclepro.2016.11.053
复制
发表时间：
2017-01-20
影响因子：
11.1
通讯作者：
Yang, Yongxing
中科院分区：
文献类型：
--
作者：
Lv, Guangqiang;Deng, Liangliang;Yang, Yongxing
以固载杂多酸为催化剂，研究了果糖在水相和两相体系中的脱水反应。采用ICP-AES、N2吸附、NH3 TPD、TEM、FT-IR、XRD、TGA等手段对催化剂进行了表征。考察了反应温度、反应时间、催化剂用量、水与甲基异丁基酮（MIBK）体积比等因素对反应的影响。研究了水相中含钨硅酸（HSiW）的SiO2催化果糖转化为5-羟甲基糠醛的反应，发现在反应体系中加入MIBK可以提高果糖转化率和HMF选择性。此外，MIBK通过抑制胡敏素在催化剂表面的形成和沉积，在增加催化剂的稳定性方面显示出积极的效果。在第三次催化循环后，观察到催化活性的稳定。(C)2016爱思唯尔有限公司版权所有
The dehydration of fructose in aqueous and biphasic system was studied using heteropolyacids, immobilized in silica, as catalyst. The catalysts were characterized by ICP-AES, nitrogen sorption, NH3TPD, TEM, FT-IR, XRD, and TGA. The effect of different parameters, such as reaction temperature, reaction time, catalyst loading and volume ratio of water with methyl isobutyl ketone (MIBK) was studied. Silica included tungstosilisic acid (HSiW) was found to function as an efficient catalyst for the transformation of fructose into 5-hydroxymethylfurfural in aqueous phase.Addition of MIBK into the reaction system can increase both of fructose conversion and HMF selectivity. Besides, MIBK showed a positive effect in increasing the stability of the catalyst by suppressing the formation and deposition of humins over catalyst surface. After the third catalysis cycles, a stabilization of the catalytic activity was observed. (C) 2016 Elsevier Ltd. All rights reserved.