Biodesulfurization of Tabas Coal in Pilot Plant Scale

Document Type: Research Note

Authors

Faculty of Chemical Engineering, Isfahan University of Technology, P.O. Box 84156-83111 Isfahan, I.R. IRAN

Abstract

Sulfur emission from coal combustion presents many environmental problems. The techniques used to reduce the amount of sulfur in coal before combustion, include physical, chemical and biological processes.Biological processes based on degradation of sulfur compounds by microorganisms offer many advantages over the conventional physical and chemical processes. The processes are performed under mild conditions with no harmful reaction products and the value of coal is not affected. In this article the progress achieved to date in biodesulfurization of Tabas coal in pilot plant is reviewed. Effect of particle size and pulp density at constant temperature on coal biodesulfurization investigated in this research. The best results obtained was 45% of pyritic sulfur and 20% of total sulfur in reduction at pulp density of 10% and 0-0.5 mm particle size within  14 days.

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[1] E Kaicheng Liu, Ji Yang, Jinping Jia, Yaling Wang, Desulfurization of Coal Via Low Temperature Atmospheric Alkaline Oxidation, Chemosphere, 71, p. 183 (2008).

[2] Ehsani M.R., Eghbali F., Reduction of Sulfur and Ash from Tabas Coal by Froth Flotation, Iran. J. Chem. & Chem. Eng, 26 (3), (2007).

[3] Ehsani M.R., Desulfurization of Tabas Coals Using Chemical Reagents, Iran. J. Chem. & Chem. Eng, 25 (2), (2006).

[4] Navabi S.J., Ehsani M.R., Taherzadeh M.J., "Biodesulfurization of Iranian High Sulfur Coal", SSCHE32, Tatranske Matliare,Slovakia, May (2005).

[5] Isabel Cristina Cardona, Marco Antonio Márquez, Biodesulfurization of Two Colombian Coals with Native Microorganisms, Fuel Processing Technology; 90, 1099-1106 (2009).

[6] Nemati M., Harrison S.T.L., Hansford G.S., Webb C., Biological Oxidation of Ferrous Sulphate by Thiobacillus Ferrooxidans a Review on the Kinetic Aspects, Biochemical Engineering Journal, 1, p. 171 (1998).

[6] Andrews GF, Maczuga J., Bacterial Coal Desulfurization, Biotechnology. Bioeng. Symposium, (12), p. 337 (1982).

[7] Chandra D, Roy P, Mishra AK, Chakraborthi JN, Prasad NK, Chaudhury SG., Removal of Sulfur from Coal by Thiobacillus Ferrooxidansand by Mixed Acidophilic Bacteria Present in Coal, Fuel, 59, p. 249 (1980).

[8] Beyer M., Ebner,H.G., Klien J., Influence of Pulp Density and Bioreactor Design on Microbial Desulfurization of Coal, App1. Microbiol. Biotechnology, 24, p. 342 (1986).

[9] Dastidar M.G., Malik A., Roychoudhury P.K., Biodesulfurization of Indian (Assam) Coal Using Thiobacillus Ferrooxidans (ATCC 13984), Energy Conversion and Management, 41, p. 375 (2000).