Work

Evaluating the Combustion Behavior and Kinetics of Çayırhan Coal: A Comprehensive Thermogravimetric and Thermodynamic Study

Year: 2026

Type: article

Abstract: A In this study, the combustion behavior of Çayırhan coal under an oxygen atmosphere was investigated, and its combustion kinetics and thermodynamic parameters were determined. Thermal analyses (TGA, DTG, and DSC) revealed that the combustion process occurs in two consecutive steps. The first step, where 85% of the total weight loss takes place, requires a relatively low activation energy. Conversely, the second step, corresponding to the remaining 15% of the combustion, demands a significantly higher activation energy. Both combustion stages were analyzed using model-free isoconver-sional methods. The average activation energies were calculated as 139.65 ± 9.66 kJ/mol for the first stage and 402.27 ± 65.53 kJ/mol for the second stage. Subsequent kinetic modeling studies demonstrated that both combustion reactions are highly compatible with the diffusion mechanism. Following the determination of the most suitable reaction model, the Arrhenius pre-exponential factor (A) and other thermodynamic parameters of the activated complex (ΔS‡, ΔH‡ and ΔG‡) were successfully evaluated.

Source: Thermo

DOI: 10.3390/thermo6030072

Authors: Gülbanu Koyundereli Çilgi, Elif Çavdar

Institution: Manisa Celal Bayar University

Language: English

Topic: Thermal and Kinetic Analysis

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDGs: Affordable and clean energy, Climate action

Open Access status: gold

Estimated APC paid: $1,207