TITLE:
Chemical Leaching of Low Rank Coal and its Characterization using SEM/EDAX and FTIR
AUTHORS:
B. Manoj, A.G. Kunjomana, K.A. Chandrasekharan
KEYWORDS:
Coal; Minerals; Characterization; SEM; EDAX; FTIR
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.8 No.10,
October
20,
2009
ABSTRACT: Demineralization of coal carried out using EDTA for different time and HF of varying
concentration. The residual coal from each treatment was characterized together with virgin
coal using Scanning Electron Microscopy and energy dispersive X-ray analysis (EDAX).
Micrograph and EDAX analysis of Virgin coal reveal the features lithophiles like aluminium,
silicates and calcium. The absence of the features corresponding inorganic elements in
residual samples is an indication of demineralization. An elemental analyzer was adopted to
analyze CHNS on virgin and residual coal sample. The current research compares the
leaching efficiency of a mild leachant and a strong leachant. The final analysis showed that
the coal under study was sub bituminous coal and leaching could improve the amount of
carbonaceous material.