TY - JOUR
T1 - Thermogravimetric-mass spectrometry study of pyrolysis of Botswana-Morupule coal
T2 - kinetic parameters determination using iso-conversional and model fitting methods
AU - Kgatlane, Kgalalelo P.
AU - Odisitse, Sebusi
AU - Gate, Casper
AU - Darkwa, James
AU - Beas, Isaac N.
N1 - Funding Information:
This study was funded by Botswana Institute for Technology Research and Innovation.
Publisher Copyright:
© 2023, Akadémiai Kiadó, Budapest, Hungary.
PY - 2023/8
Y1 - 2023/8
N2 - Thermogravimetric-mass spectrometry studies were carried out to determine the evolved gas during the pyrolysis of Morupule coal. Pyrolysis of the three kinds of coal (EM1, WM1 and S3-5) were carried out at various heating rates in an inert atmosphere and temperatures ranging from 25 to 900 °C. Volatile products (H2, CO, CO2, H2O, CH4) were released in relative intensities, indicating their quantities. Light volatiles such as H2 (m/z = 2) and H2O (m/z = 18) dominated the evolved gaseous products, while carbon oxides as CO (m/z = 29) and CO2 (m/z = 44) and aliphatic hydrocarbon as CH4 (m/z = 15) were the lesser products. Iso-conversional methods (Friedman and advanced integral Vyazovkin) were applied to calculate the kinetic parameters of the coal. The advanced integral Vyazovkin method was more suitable as it involves more accurate approximations. The mean activation energy calculated from the advanced integral Vyazovkin method was 155–224 kJ/mol.
AB - Thermogravimetric-mass spectrometry studies were carried out to determine the evolved gas during the pyrolysis of Morupule coal. Pyrolysis of the three kinds of coal (EM1, WM1 and S3-5) were carried out at various heating rates in an inert atmosphere and temperatures ranging from 25 to 900 °C. Volatile products (H2, CO, CO2, H2O, CH4) were released in relative intensities, indicating their quantities. Light volatiles such as H2 (m/z = 2) and H2O (m/z = 18) dominated the evolved gaseous products, while carbon oxides as CO (m/z = 29) and CO2 (m/z = 44) and aliphatic hydrocarbon as CH4 (m/z = 15) were the lesser products. Iso-conversional methods (Friedman and advanced integral Vyazovkin) were applied to calculate the kinetic parameters of the coal. The advanced integral Vyazovkin method was more suitable as it involves more accurate approximations. The mean activation energy calculated from the advanced integral Vyazovkin method was 155–224 kJ/mol.
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U2 - 10.1007/s11144-023-02459-z
DO - 10.1007/s11144-023-02459-z
M3 - Article
AN - SCOPUS:85166327718
SN - 1878-5190
VL - 136
SP - 2343
EP - 2358
JO - Reaction Kinetics, Mechanisms and Catalysis
JF - Reaction Kinetics, Mechanisms and Catalysis
IS - 4
ER -