脱氢枞酸的非等温热分解动力学?  

Non-Isothermal Decomposition Kinetics of Dehydroabietic Acid

作　　者：祝远姣[1] 陈小鹏[1] 周龙昌[1] 梁杰珍[1] 钟华[1] 童张法[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《高校化学工程学报》2009年第3期434-439,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金资助项目(30560119);教育部高等学校博士学科点专项科研基金项目(20070593004);广西青年基金资助项目(0832008);广西自然科学基金资助项目(0575003);广西研究生教育创新计划项目(2007105930817D06;2006105930817M30);广西大学科研基金资助项目(X071071)

摘　　要：采用TG-DTG热分析方法,在5、10、15和20K·min-1线性升温条件下,研究了脱氢枞酸在氩气气氛中的热分解反应动力学。分别运用Kissinger法、Flynn-Wall-Ozawa法对脱氢枞酸非等温热分解动力学数据进行了分析,同时运用Satava-Sestak法研究了脱氢枞酸的热分解机理。结果表明,脱氢枞酸的热分解机理为随机成核和随后生长机理,热分解反应的表观活化能为93.14kJ·mol-1,指前因子为3.72×107s-1,反应级数为1级,并按这些参数写出了其反应动力学方程。The non-isothermal decomposition kinetics of dehydroabietic acid in Ar was investigated by TG-DTG techniques with various heating rates of 5, 10, 15, and 20 K.min-1. The non-isothermal kinetic parameters were analyzed by means of Kissinger and Flynn-Wall-Ozawa method, respectively, and the thermal decomposition mechanism of dehydroabietic acid was also studied with the Satava-Sestak method. The results show that the thermal decomposition mechanism of dehydroabietic acid is controlled by the processes of random nuclear formation and the nuclear growing which follows; the apparent activation energy E, the pre-exponential factor A and the reaction order n of dehydroabietic acid non-isothermal decomposition were found as follows： E=93.14 kJ.mol-1, A=3.72× 10^7 s-1 and n=1. According to above obtained parameters, the kinetic equation for the non-isothermal decomposition of dehydroabietic acid was given in this paper.

关 键 词：脱氢枞酸 非等温热分解动力学 活化能 机理 

分 类 号：O643[理学—物理化学]