Abstract
High sulphur coal sample from Ledo colliery of Makum coalfield, Assam, India was studied using FT-IR and XRD methods. FT-IR study shows the presence of aliphatic -CH, -CH2 and -CH3 groups, aliphatic C-O-C stretching associated with -OH and -NH stretching vibrations and HCC rocking (single and condensed rings). XRD pattern of the coal shows that it is amorphous in nature. Function of Radial Distribution Analysis (FRDA) indicates that coal is lignite in type and there is no evidence of graphite-like structure. The first maximum in the G(r) plot of FRDA at r = 0.14 nm relates to the aliphatic C-C bond (Type C-CH=CH-C), the second maximum at r = 0.25 nm relates to the distance between carbon atoms of aliphatic chains that are located across one carbon atom. The curve intensity profiles obtained from FRDA show quite regular molecular packets for this coal. The coal was found to be lignite in nature.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Baruah M K, Kotoky P and Borah G C 2003 Distribution and nature of organic/mineral bound elements in Assam coals, India; Fuel 82 1783.
Cooke N E, Fuller M O and Gaikwad R P 1986 FT-i.r. spectroscopic analysis of coals and coal extracts; Fuel 65(9) 1254.
Das T K 2001 Evolution characteristics of gases during pyrolysis of maceral concentrates of Russian coking coals; Fuel 80 489–500.
Dunitz Jack D 1996 X-ray analysis and the structure of organic molecules, 2nd Edition, Helvetica Chimica Acta 338.
Elliot Martin A (ed.) 1981 Chemistry of coal utilization, 2nd supplementary volume (New York: John Wiley & Sons) 89.
Grigoriew H 1990 Diffraction studies of coal structure; Fuel 69 84.
Iordanidis A 2002 Organic Geochemistry and Petrology of Amynled Lignites, PhD Thesis, Aristotle University of the Ssaloniki, Greece.
Karr Jr C 1978 Analytical Methods for Coal and Coal products (New York: Academic Press) Vol. II.
Klug P H and Alexander L E 1974 X-ray diffraction procedures (New York: John Wiley & Sons).
Kruh R F 1962 Diffraction studies of the structure of Liquids; Chem. Rev. 62 319.
Misra B K 1992 Optical properties of some tertiary coals from northeastern India: their depositional environment and hydrocarbon potential; Int. J. Coal Geol. 20(1–2) 115–144.
Scheinman F 1970 An introduction to spectroscopic methods for the identification of organic compounds (Oxford: Pergamon Press) Vol. 1.
Speight J G 1994 Application of Spectroscopic Techniques to the Structural Analysis of Coal; Applied Spectroscopy Reviews 29(2) 117.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Saikia, B.K., Boruah, R.K. & Gogoi, P.K. FT-IR and XRD analysis of coal from Makum coalfield of Assam. J Earth Syst Sci 116, 575–579 (2007). https://doi.org/10.1007/s12040-007-0052-0
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12040-007-0052-0