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253kJ/mol,指前因子分别为11.6,11.1和19.6s^(-1);蔗糖两阶段的活化能分别为105和229kJ/mol,指前因子分别为8.2和18.6s^(-1).
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 18.6s^（-1）.
出处
《过程工程学报》
CAS
CSCD
北大核心
2010年第4期720-725,共6页
The Chinese Journal of Process Engineering
基金
国家自然科学重点基金资助项目(编号:20736002)
国家自然科学青年基金资助项目(编号:20706028)
国家"十一五"科技支撑计划基金资助项目(编号:2006BAB09802)
长江学者和创新团队发展计划基金资助项目(编号:IRT0732)
973计划前期研究专项基金资助项目(编号:2009CB226103)
国家自然科学基金委员会与香港研究资助局联合科研基金资助项目(编号:20731160614)
关键词
热分析
蔗糖
葡萄糖
分解动力学
thermal analysis
sucrose
glucose
decomposition kinetics
