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- W2066889066 abstract "In Indian coalfields huge amounts of natural coke have been produced due to magmatic intrusions. Jharia Coalfield in eastern part of India alone contains approximately 2000 Mt of baked coking coal as a consequence of these intrusions in the form of discordant and concordant bodies. This paper is an effort to investigate the effect of carbonization in two intrusion affected coal seams of Ena (seam XIII) and Alkusa (seam XIV) collieries of Jharia Coalfield. Natural coke is derived from coking coal under in-situ conditions due to intense magmatic induced heat and overburden pressure. Natural coke is characterized by the presence of low volatile matter and high ash contents and organic constituents showing isotropy and anisotropy. Through physical, petrographic and chemical properties of natural coke or ‘jhama’ as determined by various methods it has been established that the reactives in the unaltered coals (vitrinite, liptinite, pseudovitrinite, reactive semifusinite, etc.) are < 25.0 vol.%, moisture < 2.5%, volatile matter < 15.0% and hydrogen < 4.0%. The temperatures attained in the coal seams have been deciphered using some standard models, which indicate that a temperature ~ 1000 °C was attained. This produced huge amount of anisotropic and deposited carbons. An attempt has been made to understand the factors that influence the genesis of natural coke and heat altered maceral products in coals in Indian coalfields." @default.
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- W2066889066 date "2008-06-01" @default.
- W2066889066 modified "2023-10-16" @default.
- W2066889066 title "Genesis of natural cokes: Some Indian examples" @default.
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- W2066889066 doi "https://doi.org/10.1016/j.coal.2008.01.002" @default.
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