Rank of Coal
Coal is derived from vegetable matters, which first decompose and form peat. Peat under suitable geothermal condition is progressively converted to lignite, bituminous coal, and finally anthracite. The process of conversion of lignite to anthracite is known as metamorphism or coalification. The position of coal in this metamorphic series is its rank or the degree of maturity.
Classification of Coal
In the past, peat, lignite, bituminous, and anthracite all were termed as coal and used as fuel, although they differ in color, chemical structure, and physical characteristics. In the 1850s, a need for classification of coal was felt and scientists all over Europe and America tried to classify coal either on the basis of composition of residue left when coal is heated or in terms of oxygen content or on the basis of some other parameters.
Finally, Dr. Seyler came out with a brilliant idea of classifying coal not only in terms of a single elementary percentage but on the basis...
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Acknowledgments
Author is indebted to Prof. Debashis Shome, Jadavpur University, for his help in the form of suggestions.
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Dasgupta, P. (2021). Coal: Chemical Behavior with Increasing Rank. In: Tiess, G., Majumder, T., Cameron, P. (eds) Encyclopedia of Mineral and Energy Policy. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-40871-7_110-2
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DOI: https://doi.org/10.1007/978-3-642-40871-7_110-2
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Coal: Chemical Behavior with Increasing Rank- Published:
- 28 September 2022
DOI: https://doi.org/10.1007/978-3-642-40871-7_110-2
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Coal, Chemical Behavior with Increasing Rank- Published:
- 17 November 2016
DOI: https://doi.org/10.1007/978-3-642-40871-7_110-1