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Asian Journal of Materials Science
  Year: 2010 | Volume: 2 | Issue: 4 | Page No.: 204-210
DOI: 10.3923/ajmskr.2010.204.210
 
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FT-Raman Spectroscopic Study of Indian Bituminous and Sub-bitumionus Coal
B. Manoj and A.G. Kunjomana

Abstract:
In this study, Raman spectra in the 400 to 1800 cm-1 region were obtained for two different coal samples. The bands observed at 601 and 569 cm-1 were attributed to presence of Halloysite which was shifted to lower wave number with leaching. Intense bands observed at 569-640 cm-1 could also correspond to ring breathing vibration. Band due to Si-O perpendicular vibration is observed at 1090 cm-1 and is disappeared with HF leaching. The graphite band (1580 cm-1) and the defect band (1350 cm-1) were observed in the sample. Intensity of graphite band (G) was stronger in bituminous coal than sub-bituminous coal, where as the defect band was stronger in sub-bituminous coal with leaching. Presence of D-band was an indication of condensed Benzene rings in amorphous carbon and was comparatively stronger in sub-bituminous coal. Carbonyl bands were stronger in sub-bituminous coal than bituminous coal. The relatively strong band near 1695 cm-1 was attributed to carboxylic acid and relatively weak band at 1670 cm-1 was assigned to ketonic structures. Sub-bituminous coal sample was showing moderately higher absorption than bituminous coal. Samples having higher oxygen content had intense absorption band of carbonyl group compared to samples having lower oxygen content.
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How to cite this article:

B. Manoj and A.G. Kunjomana, 2010. FT-Raman Spectroscopic Study of Indian Bituminous and Sub-bitumionus Coal. Asian Journal of Materials Science, 2: 204-210.

DOI: 10.3923/ajmskr.2010.204.210

URL: https://scialert.net/abstract/?doi=ajmskr.2010.204.210

 
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