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Thermal-Gravimetric, Calorimetric and Chemical Analytical Characterisation of Coal

Received: 25 September 2014     Accepted: 11 October 2014     Published: 20 October 2014
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Abstract

Coal samples from Morupule colliery in Botswana were characterized by bomb calorimetry, thermal-gravimetric analysis, atomic absorption spectrometry and flame photometry. The average heat of combustion of the coal was found to be 27.3 kJ g-1; with a substantial amount of ashes left behind. Thermo-gravimetric analysis showed peaks at 59.40 oC corresponding to loss of surface water, an exothermic peak at 448.54 0C associated with primary devolatilization in which compounds containing carbon, hydrogen and oxygen are released and finally a second exothermic peak at 682.58 0C associated with the secondary degasification in which methane and hydrogen are released. 70.4% of the coal was left after heating to 1000 0C indicating that in its present form, Morupule coal is of low quality but releases plenty of heat on combustion. The determination of the percentage weights of Calcium, Chromium, Copper, Lead, Iron using Atomic Absorption Spectrometry (AAS) and that of Potassium and Sodium using flame photometry showed that Iron (21.0956%) is the dominant inorganic element. The percentage weights of the other elements varied between zero and 7.4301%.

Published in International Journal of Materials Science and Applications (Volume 3, Issue 6)
DOI 10.11648/j.ijmsa.20140306.18
Page(s) 325-330
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

Coal Characterization, Morupule Coal, Coal Chemical Analysis

References
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    Misael Silas Nadiye-Tabbiruka, Wilfred Ddamba, Kifilwe Tsheko, Zakarea Kenewang, Estella Judith Salamula. (2014). Thermal-Gravimetric, Calorimetric and Chemical Analytical Characterisation of Coal. International Journal of Materials Science and Applications, 3(6), 325-330. https://doi.org/10.11648/j.ijmsa.20140306.18

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    ACS Style

    Misael Silas Nadiye-Tabbiruka; Wilfred Ddamba; Kifilwe Tsheko; Zakarea Kenewang; Estella Judith Salamula. Thermal-Gravimetric, Calorimetric and Chemical Analytical Characterisation of Coal. Int. J. Mater. Sci. Appl. 2014, 3(6), 325-330. doi: 10.11648/j.ijmsa.20140306.18

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    AMA Style

    Misael Silas Nadiye-Tabbiruka, Wilfred Ddamba, Kifilwe Tsheko, Zakarea Kenewang, Estella Judith Salamula. Thermal-Gravimetric, Calorimetric and Chemical Analytical Characterisation of Coal. Int J Mater Sci Appl. 2014;3(6):325-330. doi: 10.11648/j.ijmsa.20140306.18

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  • @article{10.11648/j.ijmsa.20140306.18,
      author = {Misael Silas Nadiye-Tabbiruka and Wilfred Ddamba and Kifilwe Tsheko and Zakarea Kenewang and Estella Judith Salamula},
      title = {Thermal-Gravimetric, Calorimetric and Chemical Analytical Characterisation of Coal},
      journal = {International Journal of Materials Science and Applications},
      volume = {3},
      number = {6},
      pages = {325-330},
      doi = {10.11648/j.ijmsa.20140306.18},
      url = {https://doi.org/10.11648/j.ijmsa.20140306.18},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmsa.20140306.18},
      abstract = {Coal samples from Morupule colliery in Botswana were characterized by bomb calorimetry, thermal-gravimetric analysis, atomic absorption spectrometry and flame photometry. The average heat of combustion of the coal was found to be 27.3 kJ g-1; with a substantial amount of ashes left behind. Thermo-gravimetric analysis showed peaks at 59.40 oC corresponding to loss of surface water, an exothermic peak at 448.54 0C associated with primary devolatilization in which compounds containing carbon, hydrogen and oxygen are released and finally a second exothermic peak at 682.58 0C associated with the secondary degasification in which methane and hydrogen are released. 70.4% of the coal was left after heating to 1000 0C indicating that in its present form, Morupule coal is of low quality but releases plenty of heat on combustion. The determination of the percentage weights of Calcium, Chromium, Copper, Lead, Iron using Atomic Absorption Spectrometry (AAS) and that of Potassium and Sodium using flame photometry showed that Iron (21.0956%) is the dominant inorganic element. The percentage weights of the other elements varied between zero and 7.4301%.},
     year = {2014}
    }
    

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  • TY  - JOUR
    T1  - Thermal-Gravimetric, Calorimetric and Chemical Analytical Characterisation of Coal
    AU  - Misael Silas Nadiye-Tabbiruka
    AU  - Wilfred Ddamba
    AU  - Kifilwe Tsheko
    AU  - Zakarea Kenewang
    AU  - Estella Judith Salamula
    Y1  - 2014/10/20
    PY  - 2014
    N1  - https://doi.org/10.11648/j.ijmsa.20140306.18
    DO  - 10.11648/j.ijmsa.20140306.18
    T2  - International Journal of Materials Science and Applications
    JF  - International Journal of Materials Science and Applications
    JO  - International Journal of Materials Science and Applications
    SP  - 325
    EP  - 330
    PB  - Science Publishing Group
    SN  - 2327-2643
    UR  - https://doi.org/10.11648/j.ijmsa.20140306.18
    AB  - Coal samples from Morupule colliery in Botswana were characterized by bomb calorimetry, thermal-gravimetric analysis, atomic absorption spectrometry and flame photometry. The average heat of combustion of the coal was found to be 27.3 kJ g-1; with a substantial amount of ashes left behind. Thermo-gravimetric analysis showed peaks at 59.40 oC corresponding to loss of surface water, an exothermic peak at 448.54 0C associated with primary devolatilization in which compounds containing carbon, hydrogen and oxygen are released and finally a second exothermic peak at 682.58 0C associated with the secondary degasification in which methane and hydrogen are released. 70.4% of the coal was left after heating to 1000 0C indicating that in its present form, Morupule coal is of low quality but releases plenty of heat on combustion. The determination of the percentage weights of Calcium, Chromium, Copper, Lead, Iron using Atomic Absorption Spectrometry (AAS) and that of Potassium and Sodium using flame photometry showed that Iron (21.0956%) is the dominant inorganic element. The percentage weights of the other elements varied between zero and 7.4301%.
    VL  - 3
    IS  - 6
    ER  - 

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Author Information
  • Chemistry Department, University of Botswana, Private Bag 00704, Gaborone

  • Chemistry Department, University of Botswana, Private Bag 00704, Gaborone

  • Chemistry Department, University of Botswana, Private Bag 00704, Gaborone

  • Chemistry Department, University of Botswana, Private Bag 00704, Gaborone

  • Chemistry Department, Makerere University, P. O. Box 7062, Kampala, Uganda

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