Physicochemical, mineralogy, and thermo-kinetic characterisation of newly discovered nigerian coals under pyrolysis and combustion conditions
In this study, the physicochemical, microstructural, mineralogical, thermal, and kinetic properties of three newly discovered coals from Akunza (AKZ), Ome (OME), and Shiga (SHG) in Nigeria were examined for potential energy recovery. Physicochemical analysis revealed high combustible but low levels...
Saved in:
Main Authors: | , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Springer International Publishing
2021
|
Subjects: | |
Online Access: | http://eprints.utm.my/id/eprint/95017/1/OlagokeOladokun2021_PhysicochemicalMineralogyandThermoKinetic.pdf http://eprints.utm.my/id/eprint/95017/ http://dx.doi.org/10.1007/s40789-020-00386-1 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
my.utm.95017 |
---|---|
record_format |
eprints |
spelling |
my.utm.950172022-04-29T22:32:54Z http://eprints.utm.my/id/eprint/95017/ Physicochemical, mineralogy, and thermo-kinetic characterisation of newly discovered nigerian coals under pyrolysis and combustion conditions Nyakuma, Bemgba B. Jauro, Aliyu Akinyemi, Segun A. Hasan, M. Faizal Nasirudeen, Mohammed B. M. Fuad, Muhammad Ariff H. Oladokun, Olagoke TJ Mechanical engineering and machinery TP Chemical technology In this study, the physicochemical, microstructural, mineralogical, thermal, and kinetic properties of three newly discovered coals from Akunza (AKZ), Ome (OME), and Shiga (SHG) in Nigeria were examined for potential energy recovery. Physicochemical analysis revealed high combustible but low levels of polluting elements. The higher heating values ranged from 18.65 MJ/kg (AKZ) to 26.59 MJ/kg (SHG). Microstructure and mineralogical analyses revealed particles with a rough texture, surface, and glassy lustre, which could be ascribed to metals, quartz, and kaolinite minerals. The major elements (C, O, Si, and Al), along with minor elements (Ca, Cu, Fe, K, Mg, S, and Ti) detected are associated with clays, salts, or the porphyrin constituents of coal. Thermal analysis showed mass loss (ML) ranges from 30.51% to 87.57% and residual mass (RM) from 12.44% to 69.49% under combustion (oxidative) and pyrolysis (non-oxidative) TGA conditions due to thermal degradation of organic matter and macerals (vitrinite, inertinite and liptinite). Kinetic analysis revealed the coals are highly reactive under the oxidative and non-oxidative conditions based on the Coats–Redfern Model. The activation energy (Ea) ranged from 23.81 to 89.56 kJ/mol, whereas the pre-exponential factor (ko) was from 6.77 × 10–4/min to 1.72 × 103/min under pyrolysis and combustion conditions. In conclusion, the coals are practical feedstocks for either energy recovery or industrial applications. Springer International Publishing 2021-08 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/95017/1/OlagokeOladokun2021_PhysicochemicalMineralogyandThermoKinetic.pdf Nyakuma, Bemgba B. and Jauro, Aliyu and Akinyemi, Segun A. and Hasan, M. Faizal and Nasirudeen, Mohammed B. and M. Fuad, Muhammad Ariff H. and Oladokun, Olagoke (2021) Physicochemical, mineralogy, and thermo-kinetic characterisation of newly discovered nigerian coals under pyrolysis and combustion conditions. International Journal of Coal Science and Technology, 8 (4). pp. 697-716. ISSN 2095-8293 http://dx.doi.org/10.1007/s40789-020-00386-1 DOI:10.1007/s40789-020-00386-1 |
institution |
Universiti Teknologi Malaysia |
building |
UTM Library |
collection |
Institutional Repository |
continent |
Asia |
country |
Malaysia |
content_provider |
Universiti Teknologi Malaysia |
content_source |
UTM Institutional Repository |
url_provider |
http://eprints.utm.my/ |
language |
English |
topic |
TJ Mechanical engineering and machinery TP Chemical technology |
spellingShingle |
TJ Mechanical engineering and machinery TP Chemical technology Nyakuma, Bemgba B. Jauro, Aliyu Akinyemi, Segun A. Hasan, M. Faizal Nasirudeen, Mohammed B. M. Fuad, Muhammad Ariff H. Oladokun, Olagoke Physicochemical, mineralogy, and thermo-kinetic characterisation of newly discovered nigerian coals under pyrolysis and combustion conditions |
description |
In this study, the physicochemical, microstructural, mineralogical, thermal, and kinetic properties of three newly discovered coals from Akunza (AKZ), Ome (OME), and Shiga (SHG) in Nigeria were examined for potential energy recovery. Physicochemical analysis revealed high combustible but low levels of polluting elements. The higher heating values ranged from 18.65 MJ/kg (AKZ) to 26.59 MJ/kg (SHG). Microstructure and mineralogical analyses revealed particles with a rough texture, surface, and glassy lustre, which could be ascribed to metals, quartz, and kaolinite minerals. The major elements (C, O, Si, and Al), along with minor elements (Ca, Cu, Fe, K, Mg, S, and Ti) detected are associated with clays, salts, or the porphyrin constituents of coal. Thermal analysis showed mass loss (ML) ranges from 30.51% to 87.57% and residual mass (RM) from 12.44% to 69.49% under combustion (oxidative) and pyrolysis (non-oxidative) TGA conditions due to thermal degradation of organic matter and macerals (vitrinite, inertinite and liptinite). Kinetic analysis revealed the coals are highly reactive under the oxidative and non-oxidative conditions based on the Coats–Redfern Model. The activation energy (Ea) ranged from 23.81 to 89.56 kJ/mol, whereas the pre-exponential factor (ko) was from 6.77 × 10–4/min to 1.72 × 103/min under pyrolysis and combustion conditions. In conclusion, the coals are practical feedstocks for either energy recovery or industrial applications. |
format |
Article |
author |
Nyakuma, Bemgba B. Jauro, Aliyu Akinyemi, Segun A. Hasan, M. Faizal Nasirudeen, Mohammed B. M. Fuad, Muhammad Ariff H. Oladokun, Olagoke |
author_facet |
Nyakuma, Bemgba B. Jauro, Aliyu Akinyemi, Segun A. Hasan, M. Faizal Nasirudeen, Mohammed B. M. Fuad, Muhammad Ariff H. Oladokun, Olagoke |
author_sort |
Nyakuma, Bemgba B. |
title |
Physicochemical, mineralogy, and thermo-kinetic characterisation of newly discovered nigerian coals under pyrolysis and combustion conditions |
title_short |
Physicochemical, mineralogy, and thermo-kinetic characterisation of newly discovered nigerian coals under pyrolysis and combustion conditions |
title_full |
Physicochemical, mineralogy, and thermo-kinetic characterisation of newly discovered nigerian coals under pyrolysis and combustion conditions |
title_fullStr |
Physicochemical, mineralogy, and thermo-kinetic characterisation of newly discovered nigerian coals under pyrolysis and combustion conditions |
title_full_unstemmed |
Physicochemical, mineralogy, and thermo-kinetic characterisation of newly discovered nigerian coals under pyrolysis and combustion conditions |
title_sort |
physicochemical, mineralogy, and thermo-kinetic characterisation of newly discovered nigerian coals under pyrolysis and combustion conditions |
publisher |
Springer International Publishing |
publishDate |
2021 |
url |
http://eprints.utm.my/id/eprint/95017/1/OlagokeOladokun2021_PhysicochemicalMineralogyandThermoKinetic.pdf http://eprints.utm.my/id/eprint/95017/ http://dx.doi.org/10.1007/s40789-020-00386-1 |
_version_ |
1732945421991411712 |
score |
13.160551 |