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Mineralogical and ash geochemical studies of coal-mine shale and its hydrocarbon potential: A case study of shale from Makum coalfield, Northeast India.
- Source :
-
Journal of the Geological Society of India . Sep2017, Vol. 90 Issue 3, p329-334. 6p. - Publication Year :
- 2017
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Abstract
- The mineralogy and geochemical studies of the coal-mine shale collected from the Tirap opencast coal-mine (Makum coalfield, Northeast India) are reported in this paper. Thermo-chemical conversion (pyrolysis) of coal-mine shale has been studied to see its hydrocarbon potential. A combined approach using X-Ray diffraction (LTA-XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) equipped with an energy-dispersive X-ray spectrophotometer (EDS), X-ray fluorescence spectrometry (XRF), thermogravimetry-derivative and differential thermogravimetric (TG-DTG and DTA) analysis is made to obtain new information on the mineralogical and geochemical studies of a coal-mine shale (CMS) sample. Gas chromatography-mass spectrometry (GC-MS) analysis is performed to evaluate the quality of the liquid fraction (tar) obtained after pyrolysis at 600°C. The shale sample is dominated by quartz, clay minerals (kaolinite and illite), sulphate bearing phase like gypsum with minor proportion of anatase, probably as artifacts of the plasma-ashing process. GC-MS analysis illustrates the presence of highly oxygenated organic components (M.W. around 94-108) and high molecular weight (M.W. 256) cyclic sulphur (e.g. octathiocane with molecular formula S) compounds along with the complex N-containing organic sulphur compounds (M.W. around 255-486) in the tar produced. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00167622
- Volume :
- 90
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of the Geological Society of India
- Publication Type :
- Academic Journal
- Accession number :
- 125223891
- Full Text :
- https://doi.org/10.1007/s12594-017-0721-9