Desulfurization of Tabas Coals Using Chemical Reagents

Document Type : Research Article

Author

Chemical Engineering Department, Isfahan University of Technology, P. O. Box 84156, Isfahan, I.R. IRAN

Abstract

Large reserves of coal in Tabas region of Iran are characterized by low ash and high caking index, suitable for use in metallurgy as coking coal. However, these coals cannot be gainfully utilized because of their high sulfur content. In this work, studies on desulfurization of Tabas coals were carried out in a batch reactor using various reagents. The most effective reagents, Fe2(SO4)3 , FeCl3 , NaOH, CH3OH, HNO3, and H2O2 , were used to remove sulfur and ash from Tabas coals under reasonable pressure and temperature. Results obtained from coal desulfurization experiments using these reagents are presented in this paper. It was found that ferric sulphate is one of the suitable chemical reagent for desulfurization of Tabas coal which could be used to remove most of the fine distributed pyritic sulfur content.
 

Keywords

Main Subjects


[1] Meyers, R.A., CoalDesulfurization, Marcel Dekker, New York, NY, 254, (1977).
[2] Morrison, G.F., “Chemical Desulfurization of Coal”, IEA Coal Research, London, (1981).
[3] Markuszewski, R. and Chriswell C.D., Proc. 6th Annual Coal Preparation, Utilization and Environ-mental Control Coutractors  Conference,  Pittsburgh, p.p. 184-191, (1991).
[4] Nowak, M. A. and Meyers, R. A., “Processing and Utilization of High-Sulfur Coals V”, (Parekh and Groppo, eds.), Elsevier Science Publishers, Amsterdam, p.p. 305-315, (1993).
[5] Huffman, G.P., Shah, N., Huggins, F.E., Stock, L.M., Chatterjee, K., Kilbane Ⅱ, J.J., Chou, M.M. and Buchanan, D.H., Fuel, 74 (4), p. 549 (1995).
[6] Majchrowicz, B.B., Franco, D.V., Yperman, J., Reggers, G., Gelan, J., Martens, H., Mullens, J. and Van Poucke, L.C., Fuel, 70 (3), p. 434 (1991).
[7] Mukherjee, S., and Borthakur, P.C., Fuel, 80, p. 2037 (2001).
[8] Chriswell, C. D., Shah, N. D., Kaushik, S.M., and Markuszewski, R., Fuel Process. Technol., 22, p. 25 1989).
[9] Vasilakos, N.P. and Clinton, C.S., Fuel, 63, p. 1561 (1984).
[10] Hwang, C.C., Streeter, R.C., Young, R.K. and Shah, Y.T., Fuel, 66, p. 1574 (1987).
[11] Papangelakis, V.G. and Demopoulos, G.P., Hydro-metallurgy, 26, p. 309 (1991).
[12] Ozdemir,  M., Bayrakceken, S., Gurses, A. and Gulaboglu, S., Fuel Processing Technol., 26, p. 15 (1990).
[13] Antonijevic, M.M., Dimitrijevic, M. and Jankovic, Z., Hydrometallurgy, 32, p. 61 (1993).
[14] Zheng, C.Q., Allen, C.C. and Bautista, R.G., Ind. Eng. Chem. Process Des. Dev., 25, p. 308 (1986).
[15] Oguz, M. and Olcay, A., Fuel, 71, p. 199 (1992).
[16] Attia, Y.A. and Fung, A., “Processing and Utilization of High-Sulfur Coals V”, (Parekh and Groppo, eds.), Elsevier Science Publishers, Amsterdam, p.p. 263-282, (1993).
[17] Alvarez, R., Clemente, C. and Gomez-Limon, D., Fuel, 75 (5), p. 606 (1996).
[18] Li,W. and Guo, S., Fuel Processing Technology, 46, p. 143 (1996).
[19] Meffe, S., Perkson, A. and Trass, O., Fuel, 75, p. 25, (1996).
[20] Ratanakandilok, S., Ngamprasertsith, S. and Prasas-sarakich, P., Fuel, 80, p. 1937, (2001).
[21] American Society for Testing and Materials, Annual Book of ASTM Standards, Part 26, Methods D2492 and D3177, Philadelphia, PA, USA, (1983).
[22] Ersahan, H.,  Boncukcuogiu,  R. and  Muhtar,  K.M., Fuel, 74, p. 1682 (1995).
[23] Srivastava, S.K., Fuel Processing Technology, 84, p. 37 (2003).
[24] Ali, A., Srivastava, S.K. and Haque, R., Fuel, 71, p. 835 (1992).
[25] Alvarez, R., Clemente, C. and Gomez-Limon, D., Fuel, 82, p. 2007 (2003).
[26] Ehsani, M.R., Rezvani, Gh. And Eghbali, F., Proc. 10th Asian Pacific Confederation of Chem. Eng. (APCChE), Kitakushu, Japan, (oct. 2004).