A Kinetic Study of the Stepwise Thermal Decomposition of Various Coals from Mongolia

The thermolysis of Mongolian coals of different ranks was studied using thermal analysis (TG/DTG). The stepwise decomposition under conditions of programmed heating to 1000°C in an atmosphere of argon was found. The kinetic parameters of pyrolysis were determined based on thermogravimetric analysis...

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Bibliographic Details
Published in:Solid fuel chemistry 2021, Vol.55 (1), p.1-7
Main Authors: Fetisova, O. Yu, Kuznetsov, P. N., Purevsuren, B., Avid, B.
Format: Article
Language:English
Subjects:
Argon
Chemistry
Chemistry and Materials Science
Decomposition
Organic matter
Physical Chemistry
Pyrolysis
Thermal analysis
Thermal decomposition
Thermogravimetric analysis
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Summary:The thermolysis of Mongolian coals of different ranks was studied using thermal analysis (TG/DTG). The stepwise decomposition under conditions of programmed heating to 1000°C in an atmosphere of argon was found. The kinetic parameters of pyrolysis were determined based on thermogravimetric analysis with the use of model-fitting (Coats–Redfern) and model-free (Ozawa–Flynn–Wall) calculation methods. Changes in the activation energy with the degree of decomposition of the organic matter of coals of different ranks were established. A kinetic compensation effect was revealed, which was, probably due to the multicomponent composition of coals.
ISSN:0361-5219
1934-8029
DOI:10.3103/S0361521921010031