Comprehensive method based on model free method and IKP method for evaluating kinetic parameters of solid state reactions

2012 ◽  
Vol 33 (31) ◽  
pp. 2516-2525 ◽  
Author(s):  
Yunqing Han ◽  
Tianxiang Li ◽  
Kozo Saito
Keyword(s):  
Solid State ◽  
Kinetic Parameters ◽  
Solid State Reactions ◽  
Model Free ◽  
Comprehensive Method ◽  
Ikp Method

scholarly journals Kinetic Study and Thermal Decomposition Behavior of Lignite Coal

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Mehran Heydari ◽  
Moshfiqur Rahman ◽  
Rajender Gupta
Keyword(s):  
Solid State ◽  
Thermal Behavior ◽  
Kinetic Parameters ◽  
Model Fitting ◽  
Isoconversional Methods ◽  
Solid State Reactions ◽  
Process Conditions ◽  
Coal Pyrolysis ◽  
Model Free ◽  
Lignite Coal

A thermogravimetric analyzer was employed to investigate the thermal behavior and extract the kinetic parameters of Canadian lignite coal. The pyrolysis experiments were conducted in temperatures ranging from 298 K to 1173 K under inert atmosphere utilizing six different heating rates of 1, 6, 9, 12, 15, and 18 K min−1, respectively. There are different techniques for analyzing the kinetics of solid-state reactions that can generally be classified into two categories: model-fitting and model-free methods. Historically, model-fitting methods are broadly used in solid-state kinetics and show an excellent fit to the experimental data but produce uncertain kinetic parameters especially for nonisothermal conditions. In this work, different model-free techniques such as the Kissinger method and the isoconversional methods of Ozawa, Kissinger-Akahira-Sunose, and Friedman are employed and compared in order to analyze nonisothermal kinetic data and investigate thermal behavior of a lignite coal. Experimental results showed that the activation energy values obtained by the isoconversional methods were in good agreement, but Friedman method was considered to be the best among the model-free methods to evaluate kinetic parameters for solid-state reactions. These results can provide useful information to predict kinetic model of coal pyrolysis and optimization of the process conditions.

Application of non-linear heating regime for the determination of activation energy and kinetic parameters of solid-state reactions

1998 ◽  
Vol 323 (1-2) ◽  
pp. 101-107 ◽  
Author(s):  
K.V Tomashevitch ◽  
S.V Kalinin ◽  
A.A Vertegel ◽  
N.N Oleinikov ◽  
V.A Ketsko ◽  
...  
Keyword(s):  
Activation Energy ◽  
Solid State ◽  
Kinetic Parameters ◽  
Solid State Reactions ◽  
Heating Regime ◽  
Linear Heating ◽  
Non Linear
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