Non quasi-stationary state pyrolysis. Kinetic parameters of neopentane pyrolysis mechanism

1978 ◽  
Vol 9 (2) ◽  
pp. 171-175 ◽  
Author(s):  
P. M. Marquaire ◽  
G. M. Côme
Keyword(s):  
Kinetic Parameters ◽  
Stationary State ◽  
Pyrolysis Mechanism ◽  
Quasi Stationary State ◽  
Pyrolysis Kinetic

scholarly journals AN INNOVATE METHOD OF THERMOGRAVIMETRIC DATA ANALYSIS

2021 ◽  
Vol 64 (3) ◽  
pp. 24-32
Author(s):  
Mihail V. Mal’ko ◽  
Sergej V. Vasilevich ◽  
Andrey V. Mitrofanov ◽  
Vadim E. Mizonov
Keyword(s):  
Experimental Data ◽  
Thermal Decomposition ◽  
Thermogravimetric Analysis ◽  
Kinetic Parameters ◽  
Calculation Method ◽  
Kinetic Calculation ◽  
Pyrolysis Mechanism ◽  
Total Mass Loss ◽  
Thermogravimetric Data ◽  
Heavy Tar

The objective of the study is to examine the Coats-Redfern approximation and to propose an innovative kinetic calculation method for the complex process of the heavy tar thermal decomposition under non-isothermal process. The thermal decomposition process was examined using the thermogravimetric analysis. There are several kinetic models proposed to analyze pyrolysis mechanism in terms of the formal reaction. In this manner, the kinetic parameters of the pyrolysis process can be evaluated based on total mass loss (thermogravimetric analysis –TGA). The TGA procedures can be conducted with isothermal or non-isothermal conditions, but the experimental data obtained according to this procedure have to be transformed into appropriate correlation. The obtained results have shown that the reaction takes place within temperature range of 540 K to 700 K and the inductive period of the process is about 224 min. Kinetic parameters were estimated with using of the conventional Coats-Redfern method. A new kinetic calculation method has been designed to provide a less laboriousness of identifications procedures compared with Coats-Redfern approximation and to take into account an induction time of the process. As the outcome of this study, it was shown that the kinetic parameters estimated with using of the proposed model-fitted method gives the more appropriate correlation in comparison with the conventional Coats-Redfern method. The proposed method uses the Coats-Redfern algorithm for evaluation of the reaction mechanism, but the value of the constant rate is defined directly from experimental data on the conversion rate.

Quasi-stationary state transportation of a hose with quadrotors

2015 ◽  
Vol 63 ◽  
pp. 187-194 ◽  
Author(s):  
Julián Estévez ◽  
Jose Manuel Lopez-Guede ◽  
Manuel Graña
Keyword(s):  
Stationary State ◽  
Quasi Stationary State

Prediction of pyrolysis kinetic parameters from biomass constituents based on simplex-lattice mixture design

2016 ◽  
Vol 24 (4) ◽  
pp. 535-542 ◽  
Author(s):  
Panusit Sungsuk ◽  
Sasiporn Chayaporn ◽  
Sasithorn Sunphorka ◽  
Prapan Kuchonthara ◽  
Pornpote Piumsomboon ◽  
...  
Keyword(s):  
Kinetic Parameters ◽  
Mixture Design ◽  
Simplex Lattice ◽  
Simplex Lattice Mixture Design ◽  
Pyrolysis Kinetic
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