Chemical leaching of an Indian bituminous coal and characterization of the products by vibrational spectroscopic techniques
- Title
- Chemical leaching of an Indian bituminous coal and characterization of the products by vibrational spectroscopic techniques
- Creator
- Manoj B.; Kunjomana A.G.
- Description
- High volatile bituminous coal was demineralized by a chemical method. The vibrations of the "aromatics" structure of graphite, crystalline or non-crystalline, were observed in the spectra at the 1600 cm -1 region. The band at 1477 cm -1 is assigned as VR band, the band at 1392 cm -1 as VL band and the band at 1540 cm -1 as GR band. Graphite structure remains after chemical leaching liberates oxygenated functional groups and mineral groups. The silicate bands between 1010 and 1100 cm -1 are active in the infrared (IR) spectrum but inactive in the Raman spectrum. Absorption arising from C-H stretching in alkenes occurs in the region of 3000 to 2840 cm -1. Raman bands because of symmetric stretch of water molecules were also observed in the spectrum at 3250 cm -1 and 3450 cm -1. Scanning electron microscopy analysis revealed the presence of a graphite layer on the surface. Leaching of the sample with hydrofluoric acid decreases the mineral phase and increases the carbon content. The ash content is reduced by 84.5wt% with leaching from its initial value by mainly removing aluminum and silicate containing minerals. University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg 2012.
- Source
- International Journal of Minerals, Metallurgy and Materials, Vol-19, No. 4, pp. 279-283.
- Date
- 2012-01-01
- Subject
- Bituminous coal; Characterization; Graphite; Leaching; Vibrational Spectroscopy
- Coverage
- Manoj B., Department of Physics, Christ University, Bangalore-29 Karnataka 560029, Hosur Road, India, Research and Development Centre, Bharathiar University, Coimbatore, Tamil Nadu, India; Kunjomana A.G., Department of Physics, Christ University, Bangalore-29 Karnataka 560029, Hosur Road, India
- Rights
- Restricted Access
- Relation
- ISSN: 1869103X
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Manoj B.; Kunjomana A.G., “Chemical leaching of an Indian bituminous coal and characterization of the products by vibrational spectroscopic techniques,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/17377.