Kinetics of non-isothermal decomposition of cinnamic acid

Autor:	Xia-xin Yue, Ming-rui Zhao, Zhen-li Qi, Fei-xiong Chen
Rok vydání:	2014
Předmět:	Thermogravimetry Differential scanning calorimetry Order of reaction Chemistry Chemical process of decomposition Thermal decomposition Thermodynamics Physical and Theoretical Chemistry Thermal analysis Endothermic process Isothermal process
Zdroj:	Russian Journal of Physical Chemistry A. 88:1081-1084
ISSN:	1531-863X 0036-0244
Popis:	The thermal stability and kinetics of decomposition of cinnamic acid were investigated by thermogravimetry and differential scanning calorimetry at four heating rates. The activation energies of this process were calculated from analysis of TG curves by methods of Flynn-Wall-Ozawa, Doyle, Distributed Activation Energy Model, Satava-Sestak and Kissinger, respectively. There are only one stage of thermal decomposition process in TG and two endothermic peaks in DSC. For this decomposition process of cinnamic acid, E and logA[s−1] were determined to be 81.74 kJ mol−1 and 8.67, respectively. The mechanism was Mampel Power law (the reaction order, n = 1), with integral form G(α) = α (α = 0.1–0.9). Moreover, thermodynamic properties of ΔH≠, ΔS≠, ΔG≠ were 77.96 kJ mol−1, −90.71 J mol−1 K−1, 119.41 kJ mol−1.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8ba8e0f7435f5e152f87904057a2ee2d https://doi.org/10.1134/s0036024414070231 Zobrazit plný text záznamu Full text from SpringerLink