Thermal decomposition kinetics of carbide slag in air atmosphere

3rd International Conference on Energy Engineering and Environmental Protection

能源学;生态环境科学

Zhang, Jianyu^1^2 ; Cao, Qi^1^2 ; Liu, Hongpan^3 ; Shang, Zhibiao^4 ; Guo, Xianhua^1^2 ; Li, Yuan^1^2 ; Gu, Jian^1^2 ; Zhang, Dan^1^2 ; Jiang, Ming^1^2 ; Zhan, Fangdong^1^2

College of Resources and Environment, Yunnan Agricultural University, Kunming

650201, China^1

Yunnan Engineering Laboratory for Agro-environment Pollution Control and Eco-remediation, Kunming

650201, China^2

College of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Chongqing

402160, China^3

Guangdong Polytechnic College, School of Economics and Management, Zhaoqing

526100, China^4

关键词: Apparent activation energy;    Decomposition characteristics;    Iso-conversional method;    Natural logarithms;    Preexponential factor;    Simultaneous measurement;    Thermal decomposition kinetics;    Thermal decomposition process;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/227/5/052065/pdf
DOI  :  10.1088/1755-1315/227/5/052065

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this study, the thermal decomposition characteristics and kinetics of carbide slag were evaluated by simultaneous measurements of thermogravimetry (TG)/differential thermal (DTA) analyses under air atmosphere. The data revealed that mass thermal decomposition processes could be divided into three stages, in which the last two stages at 400-490°C and 710-790°Cunderwent largest thermal decomposition weight loss. The thermal decomposition kinetic parameters were calculated by the Kissinger method and the corresponding apparent activation energies were estimated to 204.00 and 311.40kJ•mol-1, respectively. The respective natural logarithms of pre-exponential factor (In A) calculated by Kissinger method were 1.07×1011 and 1.77×1012. For comparison, the thermal decomposition kinetic parameters were also calculated by FWO peak maximum evolution and FWO isoconversional methods. The apparent activation energies of the two last stages were recorded as 205.71 and 313.12kJ•mol-1, respectively.