摘要
研究了温度在443.15∽483.15K时0.1mol/L氯化铁催化木糖降解生成糠醛的反应动力学过程。首先建立并验证了反应的动力学模型,根据模型得到了木糖降解、糠醛降解和缩合反应的速率常数。由阿伦尼乌斯方程拟合得到其表观活化能分别为107.94k J/mol、65.86 k J/mol和26.36k J/mol。结果表明,高温和较短反应时间有利于糠醛收率的提高,在反应温度483.15K、60min条件下,最大糠醛收率可达78%。
The dehydration kinetics from xylose to furfural with 0.1mol/L ferric chloride as catalyst was studied at temperature range from 443.15 K to 483.15 K. The kinetic model was established and tested,then the reaction rate constants of xylose dehydration,furfural degradation and condensation were obtained according to assumed kinetic model. The evaluated activation energies of these reactions were quantified via Arrhenius plots,and the values were 107.94 k J/mol,65.86 k J/mol and 26.36 k J/mol,respectively. The experimental results showed that high temperature and short time were beneficial to improve the furfural yield,and the maximum furfural yield of 78% was obtained at 483.15 K and 60 min.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2015年第1期108-112,共5页
Chemical Industry and Engineering Progress
关键词
氯化铁
木糖
糠醛
反应动力学
ferric chloride
xylose
furfural
reaction kinetics
