欢迎访问过程工程学报, 今天是

›› 2010, Vol. 10 ›› Issue (4): 720-725.

• 过程与工艺 • 上一篇    下一篇

葡萄糖和蔗糖热分解过程的动力学分析

陈颖钦 何晗冰 刘畅 陆小华   

  1. 南京工业大学材料化学工程国家重点实验室 南京工业大学材料化学工程国家重点实验室 南京工业大学化工学院 南京工业大学化工学院
  • 收稿日期:2010-04-21 修回日期:2010-06-11 出版日期:2010-08-20 发布日期:2010-08-20
  • 通讯作者: 陈颖钦

Thermal Decomposition of Glucose and Sucrose by Kinetics Analysis

CHEN Ying-qin HE Han-bing LIU Chang LU Xiao-hua,   

  1. College of chemistry and chemical engineering, Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology College of chemistry and chemical engineering, Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology College of Chemistry and Chemical Engineering, Nanjing University of Technology College of Chemical Engineering, Nanjing University of Technology
  • Received:2010-04-21 Revised:2010-06-11 Online:2010-08-20 Published:2010-08-20
  • Contact: CHEN Ying-qin

PDF

被引次数

69

摘要： 对葡萄糖和蔗糖的热分解过程进行了TG-DTA研究，采用Kissinger法、Friedman法及非线性拟合法获得了分解过程的反应机理和动力学参数. 结果表明，葡萄糖比蔗糖更易分解. 葡萄糖的分解过程分别为二级和一级反应，蔗糖的分解过程分别为n级和一级反应. 利用非线性拟合法给出了葡萄糖与蔗糖热分解过程的完整反应途径和动力学参数，葡萄糖三阶段的活化能分别为132, 150和253 kJ/mol，指前因子分别为11.6, 11.1和19.6 s-1；蔗糖两阶段的活化能分别为105和229 kJ/mol，指前因子分别为8.2和18.6 s-1.

关键词: 热分析, 蔗糖, 葡萄糖, 分解动力学

Abstract: Thermal decomposition process of glucose and sucrose was studied by TG-DTA. The Kissinger, Friedman and non-linear regression methods were used to obtain the reaction decomposition mechanism and kinetic parameters. The results showed that the decomposition of glucose was much easier than that of sucrose. The orders of decomposition reaction for glucose in two stages were 2 and 1 respectively. However, for sucrose, the order of decomposition reaction in two stages was n and 1 respectively. Non-linear fitting of glucose and sucrose was given a complete thermal decomposition reaction pathways and kinetic parameters. The activation energy of glucose in three stages was respectively 132, 150 and 253 kJ/mol, and pre-exponential factor 11.6, 11.1 and 19.6 s-1, and activation energy of sucrose in two stages was 105 and 229 kJ/mol, and pre-exponential factor 8.2 and 18.6 s-1.

Key words: thermal analysis, sucrose, glucose, decomposition kinetics

中图分类号: