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E-Journal of Chemistry - Volume 7 2010, Issue 4, Pages 1254-1257

Department of Industrial Chemistry, P.G.Centre, Bellary-583104, Karnataka, India

Department of Applied Geology, P.G.Centre, Sandur-583119, Bellary Dist., Karnataka, India

Received 22 July 2009; Revised 14 November 2009; Accepted 10 January 2010

Copyright © 2010 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Ash, an inorganic matter present in coal is amenable for dissolution using suitable reagents. Thus the dissolution of ash and its subsequent removal reduces the release of many toxic elements into the environment by coal based industries. Removal of ash also enhances the calorific value. In the present investigation an attempt has been made to reduce the ash content of raw coal obtained from nearest thermal power by using hydrochloric acid, sulfuric acid and sodium hydroxide. A series of leaching experiments were conducted on coal of different size fractions by varying the parameters like concentration, temperature and time of leaching. The results indicate that it is possible to remove nearly 75% of ash from coal sample by leaching.

Author: K. H. Shivaprasad, M. M. Nagabhushana, and C. Venkataiah



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