Geochemistry and Mineralogy of Maastrichtian Coals from the Anambra and Gongola Basins of Nigeria: Implications for Coal Quality, Resource Potential, and Agglomeration Characteristics

زمین شناسی اقتصادی

Volume 16, Issue 2 - Serial Number 41, 2024, Pages 135-161   

Document Type: Research Article

DOI: 10.22067/econg.2024.1109

Authors

Yusuf Jimoh^{* 1}; Mariam Bolaji²; Jimoh Ajadi³; Shakirat Mustapha Aminu¹; Mutiu Adelodun Akinpelu⁴

¹Ph.D., Department of Geology and Mineral Science, Faculty of Pure and Applied Sciences, Kwara State University, Malete, Kwara State Nigeria

²Ph.D. student, Department of Geology and Mineral Science, Faculty of Pure and Applied Sciences, Kwara State University, Malete, Kwara State Nigeria

³Associate Professor., Department of Geology and Mineral Science, Faculty of Pure and Applied Sciences, Kwara State University, Malete, Kwara State Nigeria

⁴Ph.D., Department of Civil Engineering, Faculty of Engineering and Technology, Kwara State University, Malete, Kwara State, Nigeria

Abstract

Anambra and Gongola basins are part of the sedimentary inland basins in Nigeria characterized by fossil fuels and in response to its present energy problem, Nigeria has shifted its power generating focus to coal. The studied coals were obtained from two localities, namely Ankpa and Maiganga in Kogi and Gombe States, respectively. The coals were investigated to determine its quality in terms of use and resource potential. The coals were analyzed by proximate, ultimate, elemental, mineralogy and scanning electron microscopy-energy dispersive spectrometry analyses. The objectives of the study are to determine the coals cokability, rank, paleoenvironments, hydrocarbon potential, and slagging tendency. The average values of moisture content, ash, volatile matter, and fixed carbon are 5.54%, 16.42%, 48.45%, and 30.71%, respectively, for Ankpa coals, while Maiganga recorded 10.68%, 8.60%, 44.33%, and 36.41%, indicating high volatile sub-bituminous non-coking coals that are optimum for combustion and electric power generation. The Van Krevelen plot based on the H/C vs. O/C showed Type IV kerogen. The XRD results, correlation plots, and Detrital Authigenic Index (DAI) values of 7.49 and 13.49 in Ankpa and Maiganga coals, respectively, indicated that Ankpa coals are enriched in authigenic minerals like quartz, pyrite, and calcite, while kaolinite and quartz were probable detrital minerals in the Maiganga coals. The agglomeration of the coals deduced by Base/Acid (B/A), Silicon ratio (G), Silica/Alumina (S/A), Iron/Calcium (I/C), Carbon/Hydrogen (C/H), and Fixed Carbon/Volatile matter (FC/V) showed weak–medium-strong for the Ankpa coals and strong for Maiganga coals.

Keywords

Agglomeration; Coal; Detrital; Geochemistry; Proximate

References

Akande, S.O., Ogunmoyero, I.B., Petersen, H.I. and Nytoft, H.P., 2007. Source Rock Evaluation of Coals from the Lower Maastrichtian Mamu Formation, S.E. Nigeria. Journal of Petroleum Geology, 30(4): 303–324.  https://doi.org/10.1111/j.1747-5457.2007.00303.x

ASTM D3173-11, 2011. Standard Test Method for Moisture in the Analysis Sample of Coal and Coke. ASTM International, West Conshohocken, PA United States. 4 pp. https://doi.org/10.1520/D3173-11

ASTM D3174-11, 2011. Standard Test Method for Ash in the Analysis Sample of Coal and Coke. ASTM International, West Conshohocken, PA United States. Retrieved June 13, 2024, from https://www.astm.org/standards/d3174

ASTM D4326-04, 2004. Standard Test Method for Major and Minor Elements in Coal Ash by X-Ray Fluorescence West Conshohocken, PA, United States. 4 pp. https://doi.org/10.1520/D4326-04

Barnes, D.I., 2015. Understanding pulverised coal, biomass and waste combustion – A brief overview. Applied Thermal Engineering, 74: 89–95. https://doi.org/10.1016/j.applthermaleng.2014.01.057

Benkhelil, J., 1982. Benue Trough and Benue Chain. Geology Magazine 119(2):158–168. https://doi.org/10.1017/S001675680002584X

Benkhelil, J., 1989. The origin and evolution of the Cretaceous Benue Trough (Nigeria). Journal of African Earth Sciences (and the Middle East), 8(2–4): 251–282. https://doi.org/10.1016/s0899-5362(89)80028-4

Burke, K.C., Dessauvagie, T.F.J. and Whiteman, A.J., 1971. The opening of the Gulf of Guinea and the geological history of the Benue depression and Niger delta. Nature Physical Science, 233(38): 51–55. https://doi.org/10.1038/physci233051a0

Chelgani, S.C., Hower, J.C. and Hart, B., 2011. Estimation of free-swelling index based on coal analysis using multivariable regression and artificial neural network. Fuel Processing Technology, 92(3): 349–355. https://doi.org/10.1016/j.fuproc.2010.09.027

Chukwu, M., Folayan, C.O., Pam, G.Y., Obada, D.O., 2016. Characterization of Some Nigerian Coals for Power Generation, Journal of combustion. 1–11. https://doi.org/10.1155/2016/9728278

Dai, B.Q., Low, F., De Girolamo, A., Wu, X. and Zhang, L., 2013. Characteristics of ash deposits in a pulverized lignite coal-fired boiler and the mass flow of major ash-forming inorganic elements. Energy Fuels, 27(10): 6198–6211. https://doi.org/10.1021/ef400930e

Dai, S., Ren, D., Chou, C.L., Finkelman, R.B., Seredin, V.V. and Zhou, Y.P., 2012. Geochemistry of trace elements in Chinese coals: a review of abundances, genetic types, impacts on human health, and industrial utilization. International journal of Coal Geology, 94: 3–21. https://doi.org/10.1016/j.coal.2011.02.003

Dim, C.I.P., Onuoha, K.M., Okeugo, C.G. and Ozumba, B.M., 2017. Petroleum system elements within the Late Cretaceous and early Paleogene sediments of Nigeria’s inland basins: an integrated sequence stratigraphic approach. Journal of African Earth Sciences, 130: 76–86. https://doi.org/10.1016/j.jafrearsci.2017.03.007

Dıez, M.A., Alvarez, R. and Barriocanal, C., 2002. Coal for metallurgical coke production: predictions of coke quality and future requirements for coke making. International Journal of Coal Geology, 50(1-4): 389–412. https://doi.org/10.1016/s0166-5162(02)00123-4

Ekwenye, O.C., Nichols, G.J., Okogbue, C.O. and Mode, A.W., 2016. Trace fossil assemblages in the tide-dominated estuarine system: Ameki Group, south-eastern Nigeria. Journal of African Earth Sciences, 118: 284-300.  https://doi.org/10.1016/j.jafrearsci.2016.02.001

Ekweozor, C.M. and Udo, O.T., 1988. The oleananes: Origin, maturation and limits of occurrence in Southern Nigerian sedimentary basins. Organic Geochemistry in Petroleum Exploration, 13: 131–140. https://doi.org/10.1016/b978-0-08-037236-5.50019-1

Englund, J.O. and Jørgensen, P., 1973. A Chemical Classification System for Argillaceous Sediments and Factors Affecting Their Composition. Geologiska Foreningens I Stockholm Forhandlingar, 95(1): 87-97. https://doi.org/10.1080/11035897309455428

Eskenazy, G.M., 1980. On the geochemistry of indium in coal-forming process. Geochimica et Cosmochimica Acta, 44(7): 1023–1027. https://doi.org/10.1016/0016-7037(80)90290-2

Ezeme, S., 2022. Coal-fired power plants bounce back to boost Nigeria's electricity supply. EnergyDay Nigeria, Retrieved June 13, 2024, from https://energydayng.com/2022/07/05/coal-fired-power-plants-bounce-back-to-boost-nigerias-electricity-supply/

Fatoye, F.B., Gideon, Y.B. and Omada, J.I., 2021. Geochemical Characteristics of the Cretaceous Emewe–Efopa Coal in the Northern Anambra Basin of Nigeria. Communication in Physical Sciences, 7(1): 14-17. Retrieved June 13, 2024, from http://www.journalcps.com/index.php/volumes/article/view/182

Finkelman, R.B., 1995. Modes of Occurrence of Environmentally-Sensitive Trace Elements in Coal. In: D.J. Swaine and F. Goodarzi (Editors), Environmental Aspects of Trace Elements in Coal. Springer Dordrecht, pp. 24–50. https://doi.org/10.1007/978-94-015-8496-8_3

Ghosh, A. and Chatterjee, A., 2008. Iron making and steelmaking: theory and practice. PHI Learning Pvt. Ltd. 492 pp. Retrieved June 13, 2024, from https://books.google.com.ng/books/about/IRON_MAKING_AND_STEELMAKING.html?id=7_GcmB4i_dsC&redir_esc=y    

Guo, L., Zhai, M., Wang, Z., Zhang, Y. and Dong, P., 2018. Comprehensive coal quality index for evaluation of coal agglomeration characteristics. Fuel, 231: 379–386.  https://doi.org/10.1016/j.fuel.2018.05.119

Hoque, M. and Nwajide, C.‌S., 1985. Application of Markov chain and entropy analysis to lithologic successions: An example from the Cretaceous of the Benue trough (Nigeria). Geologische Rundschau, 74(1): 165–177. https://doi.org/10.1007/bf01764578

Hower, J.C., Thomas, G.A. and Hopps, S.G., 2014. Trends in coal utilization and coal-combustion product production in Kentucky: Results of the 2012 survey of power plants. Coal Combustion & Gasification Products, 6(1): 35–41.

Jauro, A., Obaje N.G., Agho, M.O., Abubakar, M.B. and Tukur, A., 2007. Organic geochemistry of Cretaceous Lamza and Chikila coals, upper Benue trough, Nigeria. Fuel, 86(4): 520–532. https://doi.org/10.1016/j.fuel.2006.07.031

Jimoh, A.Y., Ajadi, J. and Ajala, A.A., 2023. Evaluation of Coal Quality: A Case Study of Ankpa Coal, Mamu Formation Anambra Basin, South-Eastern Nigeria. In: F. Lucci, D.M, Doronzo, J. Knight, A. Travé, S. Grab, A. Kallel and H. Chenchouni (Editors), Selected Studies in Geomorphology, Sedimentology, and Geochemistry. Advances in Science, Technology & Innovation. pp. 29–32.  https://doi.org/10.1007/978-3-031-43744-1_6

Jimoh, A.Y. and Ojo, O.J., 2016. Rock-Eval pyrolysis and organic petrographic analysis of the Maastrichtian coals and shales at Gombe, Gongola Basin, Northeastern Nigeria. Arabian Journal of Geosciences, 9(443): 1–13. https://doi.org/10.1007/s12517-016-2467-x

Jimoh, A.Y. and Ojo, O.J., 2021. Inorganic Geochemical Evaluation of Maastrichtian Coal at Gombe, Gongola Basin, Nigeria: Implications for Resource Potential and Paleoenvironments. International Journal of Clean Coal and Energy, 10(01): 1–19. https://doi.org/10.4236/ijcce.2021.101001

Li, K., Khanna, R., Zhang, J., Barati, M., Liu, Z., Xu, T., Yang, T. and Sahajwalla, V., 2015. Comprehensive Investigation of various structural features of bituminous coals using advanced analytical techniques. Energy Fuels 29(11): 7178–7189. https://doi.org/10.1021/acs.energyfuels.5b02064

Liu, B., He, Q., Jiang, Z., Xu, R. and Hu, B., 2013. Relationship between coal ash composition and ash fusion temperatures. Fuel, 105: 293–300. https://doi.org/10.1016/j.fuel.2012.06.046

Meng, F., Gupta, S., French, D., Koshy, P., Sorrell, C. and Shen, Y., 2017. Characterization of microstructure and strength of coke particles and their dependence on coal properties. Powder Technology, 320: 249–256. https://doi.org/10.1016/j.powtec.2017.07.046

Mochizuki, Y., Ono, Y., Uebo, K. and Tsubouchi, N., 2013. The fate of sulfur in coal during carbonization and its effect on coal fluidity. International Journal of Coal Geology, 120: 50–56. https://doi.org/10.1016/j.coal.2013.09.007

Murat, R.C., 1972. Stratigraphy and paleogeography of the cretaceous and lower tertiary in Southern Nigeria, In: T.F.J..Dessauvagie and A.J. Whiteman (Editors), African Geology University of Ibadan Press, Ibadan, Nigeria 251–266. Retrieved June 13, 2024, from https://www.scirp.org/reference/referencespapers?referenceid=3147493

Nwajide, C.S., 2005. Anambra Basin of Nigeria: Synoptic Basin Analysis as a Basis for Evaluation its Hydrocarbon Prospectivity. In: C.O. Okogbue (Editor), Hydrocarbon potentials of the Anambra Basin, Great AP Express Publishers Ltd., Nsukka, pp. 2-46. Retrieved June 13, 2024, from https://www.scirp.org/reference/referencespapers?referenceid=3711390

Nwajide, C.S., 2013. Geology of Nigeria’s Sedimentary Basins. CSS Bookshop Ltd., Lagos, pp. 565. Retrieved June 13, 2024, from https://www.scirp.org/reference/referencespapers?referenceid=1551678

Nwajide, C.S. and Reijers, T.J.A., 1996. Geology of the Southern Anambra Basin. In: T.J.A. Reijers (Editor), Selected Chapters on Geology, SPDC Corporate Reprographic Services, Warri, Nigeria, pp. 215-270. Retrieved June 13, 2024, from https://www.sciepub.com/reference/363510

Nyakuma, B.B., 2019. Physicochemical geomineralogical, and evolved gas analyses of newly discovered Nigerian Lignite Coals. Coke Chem 62(9): 394–401.  https://doi.org/10.3103/s1068364x19090060

Obaje, N.G., 2009. Geology and Mineral Resources of Nigeria. Springer-Verlag Berlin Heidelberg, pp. 221. https://doi.org/10.1007/978-3-540-92685-6

Obaje, N.G., Attah, D.O., Opeloye, S.A. and Moumouni, A., 2006. Geochemical evaluation of the hydrocarbon prospects of sedimentary basins in Northern Nigeria. Geochemical Journal 40(3): 227–243. https://doi.org/10.2343/geochemj.40.227

Obaje, N.G., Ulu, O.K. and Petters, S.W., 1999. Biostratigraphic and geochemical controls of hydrocarbon prospects in the Benue Trough and Anambra Basin, Nigeria. Nigerian Association of Petroleum Explorationists (NAPE) Bulletin 14(1): 15–18. Retrieved June 13, 2024, from https://www.sciepub.com/reference/52511

Odunze, S.O., Obi, G.C., Yuan, W. and Min, L., 2013. Sedimentology and sequence stratigraphy of the Nkporo Group (Campanian–Maastrichtian) Anambra Basin, Nigeria. Journal of Palaeogeography. 2(2): 192–208. Retrieved June 17, 2024, from https://www.sciencedirect.com/science/article/pii/S2095383615301462

Ryan, B., Leeder, R. and Price, J.T., 1998. The effect of coal preparation on the quality of clean coal and coke. British Columbia Geological Survey Branch: Geological Fieldwork. pp. 247–275. Retrieved June 13, 2024, from https://cmscontent.nrs.gov.bc.ca/geoscience/PublicationCatalogue/Paper/BCGS_P1999-01-17_Ryan.pdf

Ryemshak, S.A. and Jauro, A., 2013. Proximate analysis, rheological properties and technological applications of some Nigerian coals. International Journal of Industrial Chemistry, 4: 1–7. Retrieved June 17, 2024, from https://link.springer.com/article/10.1186/2228-5547-4-7

Schobert, M., 1987. Coal: The Energy Source of the Past and Future. American Chemical Society, Washington, USA, pp. 188.  https://doi.org/10.1021/ac00157a728

Shao, J., Lee, D.H., Yan, R., Liu, M., Wang, X., Liang, D.T., White, T.J. and Chen, H., 2007. Agglomeration Characteristics of Sludge Combustion in a Bench-Scale Fluidized Bed Combustor. Energy & Fuels, 21(5) :2608–2614. https://doi.org/10.1021/ef070004q

Speight, J.G., 2015. Handbook of coal analysis. John Wiley & Sons. pp. 368. Retrieved June 13, 2024, from https://books.google.com/books/about/Handbook_of_Coal_Analysis.html?id=E4EZBwAAQBAJ

Swaine, D.J., 1990. Relevance of trace elements in coal. Trace Elements in Coal, 196–214. https://doi.org/10.1016/b978-0-408-03309-1.50014-9

Van Krevelen, D.W., 1961. Coal: Typology-chemistry-physics- constitiution. Amsterdam: Elsevier Science.p514. Retrieved June 13, 2024, from https://openlibrary.org/books/OL14098775M/Coal

Vassilev, S. and Vassileva, C., 1996. Occurrence, abundance, and origin of minerals in coals and coal ashes. Fuel Processing Technology 48(2): 85–106. https://doi.org/10.1016/s0378-3820(96)01021-1

Vassilev, S.V. and Vassileva, C.G., 1997. Geochemistry of coals, coal ashes and combustion wastes from coal-fired power stations. Fuel Processing Technology, 51(1–2): 19–45. https://doi.org/10.1016/s0378-3820(96)01082-x

Vassilev, S.V. and Vassileva, C.G., 2009. A new approach for the combined chemical and mineral classification of the inorganic matter in coal. 1. Chemical and mineral classification systems. Fuel, 88(2): 235–245. https://doi.org/10.1016/j.fuel.2008.09.006

Vassilev, S.V., Yossifova, M.G. and Vassileva, C.G., 1994. Mineralogy and geochemistry of Bobov Dol coals, Bulgaria. International Journal of Coal Geology, 26(3–4): 185–213.  https://doi.org/10.1016/0166-5162(94)90010-8

Yu, J., Tahmasebi, A., Han, Y., Yin, F. and Li, X., 2013. A review on water in low rank coals: The existence, interaction with coal structure and effects on coal utilization. Fuel Processing Technology, 106: 9–20. https://doi.org/10.1016/j.fuproc.2012.09.051

Zhang, L., Liu, W. and Men, D., 2014. Preparation and coking properties of coal maceral concentrates. International Journal of Mining Science and Technology, 24(1): 93–98. https://doi.org/10.1016/j.ijmst.2013.12.016