Thermogravimetric-mass spectrometry study of pyrolysis of Botswana-Morupule coal: kinetic parameters determination using iso-conversional and model fitting methods

Kgalalelo P. Kgatlane; Sebusi Odisitse; Casper Gate; James Darkwa; Isaac N. Beas

doi:10.1007/s11144-023-02459-z

Thermogravimetric-mass spectrometry study of pyrolysis of Botswana-Morupule coal: kinetic parameters determination using iso-conversional and model fitting methods

Kgalalelo P. Kgatlane, Sebusi Odisitse, Casper Gate, James Darkwa, Isaac N. Beas

Chemical Sciences

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	2343-2358
Number of pages	16
Journal	Reaction Kinetics, Mechanisms and Catalysis
Volume	136
Issue number	4
DOIs	https://doi.org/10.1007/s11144-023-02459-z
Publication status	Published - Aug 2023

Keywords

Activation energy
Coal
Evolved gas
Kinetics
Model-free methods
Pyrolysis
Thermogravimetric mass spectrometry

ASJC Scopus subject areas

Catalysis
Physical and Theoretical Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s11144-023-02459-z

Cite this

@article{88d829e6adc547899738721ec5a525e5,

title = "Thermogravimetric-mass spectrometry study of pyrolysis of Botswana-Morupule coal: kinetic parameters determination using iso-conversional and model fitting methods",

abstract = "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.",

keywords = "Activation energy, Coal, Evolved gas, Kinetics, Model-free methods, Pyrolysis, Thermogravimetric mass spectrometry",

author = "Kgatlane, {Kgalalelo P.} and Sebusi Odisitse and Casper Gate and James Darkwa and Beas, {Isaac N.}",

note = "Publisher Copyright: {\textcopyright} 2023, Akad{\'e}miai Kiad{\'o}, Budapest, Hungary.",

year = "2023",

month = aug,

doi = "10.1007/s11144-023-02459-z",

language = "English",

volume = "136",

pages = "2343--2358",

journal = "Reaction Kinetics, Mechanisms and Catalysis",

issn = "1878-5190",

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}

Thermogravimetric-mass spectrometry study of pyrolysis of Botswana-Morupule coal: kinetic parameters determination using iso-conversional and model fitting methods. / Kgatlane, Kgalalelo P.; Odisitse, Sebusi; Gate, Casper et al.
In: Reaction Kinetics, Mechanisms and Catalysis, Vol. 136, No. 4, 08.2023, p. 2343-2358.

Research output: Contribution to journal › Article › peer-review

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.

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.

KW - Activation energy

KW - Coal

KW - Evolved gas

KW - Kinetics

KW - Model-free methods

KW - Pyrolysis

KW - Thermogravimetric mass spectrometry

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ER -

Thermogravimetric-mass spectrometry study of pyrolysis of Botswana-Morupule coal: kinetic parameters determination using iso-conversional and model fitting methods

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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