The thermal decomposition of dicumyl peroxide under the flow nitrogen atmosphere was studied by DSC-TG technique.The non-isothermal kinetics parameters were analyzed by means of the Kissinger and Flynn-Wall-Ozawa meth...The thermal decomposition of dicumyl peroxide under the flow nitrogen atmosphere was studied by DSC-TG technique.The non-isothermal kinetics parameters were analyzed by means of the Kissinger and Flynn-Wall-Ozawa methods,and the thermal decomposition mechanism of dicumyl peroxide was also studied with the Satava-Sestak method.The results showed that there was little difference between kinetic parameters calculated by DSC plot and DTG plot,the apparent activation energy and pre-exponential factor were 120.83 kJ·mol-1 and 9.12×1011s-1,respectively.The thermal decomposition mechanism of dicumyl peroxide in nitrogen was controlled by interface reaction R3.展开更多
通过对南方7种典型乔木叶片在空气气氛条件下,升温速度为10℃·min^(-1)的热重分析,研究了其热解特性和热解动力学特征,并基于热解参数对其燃烧性进行了四维评价。结果表明:(1)综纤维素开始分解的温度为140.54~158.67℃,结束温度为3...通过对南方7种典型乔木叶片在空气气氛条件下,升温速度为10℃·min^(-1)的热重分析,研究了其热解特性和热解动力学特征,并基于热解参数对其燃烧性进行了四维评价。结果表明:(1)综纤维素开始分解的温度为140.54~158.67℃,结束温度为372.01~389.91℃。木素开始分解温度为372.01~389.91℃,结束温度为538.63~581.32℃。(2)综纤维素热解的活化能为34.059~48.531 k J·mol^(-1),指前因子为72.012~1 966.463 min^(-1)。木素热解的活化能为31.264~54.091 k J·mol^(-1),指前因子为31.755~1 909.015 min^(-1)。除麻栗和毛竹外,木素热解的活化能和指前因子都高于综纤维素的活化能和指前因子。(3)7种可燃物的四维燃烧性不完全一致。华山松四维燃烧性都高,麻栗都差。其他5个树种的四维燃烧性不一致。展开更多
文摘The thermal decomposition of dicumyl peroxide under the flow nitrogen atmosphere was studied by DSC-TG technique.The non-isothermal kinetics parameters were analyzed by means of the Kissinger and Flynn-Wall-Ozawa methods,and the thermal decomposition mechanism of dicumyl peroxide was also studied with the Satava-Sestak method.The results showed that there was little difference between kinetic parameters calculated by DSC plot and DTG plot,the apparent activation energy and pre-exponential factor were 120.83 kJ·mol-1 and 9.12×1011s-1,respectively.The thermal decomposition mechanism of dicumyl peroxide in nitrogen was controlled by interface reaction R3.
文摘通过对南方7种典型乔木叶片在空气气氛条件下,升温速度为10℃·min^(-1)的热重分析,研究了其热解特性和热解动力学特征,并基于热解参数对其燃烧性进行了四维评价。结果表明:(1)综纤维素开始分解的温度为140.54~158.67℃,结束温度为372.01~389.91℃。木素开始分解温度为372.01~389.91℃,结束温度为538.63~581.32℃。(2)综纤维素热解的活化能为34.059~48.531 k J·mol^(-1),指前因子为72.012~1 966.463 min^(-1)。木素热解的活化能为31.264~54.091 k J·mol^(-1),指前因子为31.755~1 909.015 min^(-1)。除麻栗和毛竹外,木素热解的活化能和指前因子都高于综纤维素的活化能和指前因子。(3)7种可燃物的四维燃烧性不完全一致。华山松四维燃烧性都高,麻栗都差。其他5个树种的四维燃烧性不一致。
