摘要
研究了压力10 MPa下、温度453.15～493.15 K范围内果糖在高温液态水中的无催化分解反应动力学.实验结果表明,在无任何催化剂条件下,果糖能顺利进行分解反应,且随着温度的升高,分解反应速率常数显著地增大.在本实验范围内,果糖分解反应的活化能为126.16 kJ·mol-1.另外,对不同温度下反应时间对果糖分解的主要产物--5-羟甲基糠醛收率的影响进行了考察.通过控制反应条件可以有选择性地调节产物分布.
The kinetics of non-catalyzed decomposition of fructose in high temperature liquid water was studied at temperatures from 453.15 K to 493.15 K and under pressure at 10 MPa. The main products of fructose decomposition were glucose, formic acid, acetic acid, levulinic acid, furfural and 5-hydroxymethyl furfural, etc. The evaluated energy of activation of fructose decomposition was 126.16 kJ·mol-1. In addition, the effects of temperature and reaction time on the yield distributions of 5-hydroxymethyl furfural were investigated. Selective decomposition of fructose in high temperature liquid water was possible.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2005年第4期677-680,共4页
CIESC Journal
基金
基金项目: 国家自然科学基金 (20176054)
浙江省自然科学基金资助项目 (ZE0214
201073).~~
关键词
高温液态水
果糖
分解
反应动力学
Acetic acid
Activation energy
Decomposition
Fructose
Furfural
Glucose
Reaction kinetics
