TY - JOUR
TI - Thermal stability and thermal decomposition kinetics of Ginkgo biloba leaves waste residue
AU - Zhang Changwei
AU - Wang Chengzhang
AU - Tao Ran
AU - Ye Jianzhong
JN - Thermal Science
PY - 2018
VL - 22
IS - 2
SP - 1059
EP - 1069
PT - Article
AB - Non-isothermal thermogravimetric analysis were used to investigate the  thermal stability and kinetics of three types of Ginkgo biloba leaves. These  three types of Ginkgo biloba leaves included: Ginkgo biloba leaves before  enzymolysis and ultrasound extraction (G1), Ginkgo biloba leaves after  enzymolysis and ultrasound extraction (G2) and Ginkgo biloba leaves after  soxhlet extraction (G3). TG/DTG experiments indicated that the thermal  stability of G2 and G3 were weaker than G1. Kissinger, Flynn-Wall-Ozawa,  Friedman and Coats-Redfern methods were firstly utilized to calculate the  kinetic parameters and predicted decomposition mechanism of G1, G2 and G3.  The thermal decomposition of G1, G2 and G3 were all corresponded to random  nucleation and growth, following the Avrami-Erofeev equation, and activation  energy of which were 191.4, 149.9 and 201.6 kJ/moL, respectively. In  addition, the thermal decomposition G1, G2 and G3 were endothermic,  irreversible and non-spontaneous.