[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).