Singh, Ashok Kumar (2008) Genesis of natural cokes: Some Indian examples. International Journal of Coal Geology , 75 (1). pp. 40-48. ISSN 0166-5162

PDF Restricted to Registered users only Download (1239Kb)

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 b25.0 vol.%, moisture b2.5%, volatile matter b15.0% and hydrogen b4.0%. 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.

Item Type:	Article
Uncontrolled Keywords:	Natural coke (jhama); Genesis; Igneous intrusion; Anisotropy
Subjects:	Methane Emission and Degasification
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	13 Dec 2014 09:26
Last Modified:	13 Dec 2014 09:26
URI:	http://cimfr.csircentral.net/id/eprint/1478

Actions (login required)

View Item