Abstract
Asphaltenes obtained from high-ash coal by precipitation with n-hexane were X-ray irradiated at different doses. The gases evolved from the irradiated samples consist mainly of ethane and propane. The condensed matter obtained upon irradiation was fractionated by Preparative Liquid Chromatography (PLC) into 8 discrete fractions and its relative distribution was studied as a function of the irradiation doses. Based on the product distribution as well as the analysis of the initial sample using PLC, GPC and IV and NMR spectroscopies, a mechanism is proposed to explain the X-ray effects on the irradiation of asphaltenes.
Similar content being viewed by others
References
J. C. MACRAE, An Introduction to the Study of Fuels, Elsevier, 1966.
F. M. LANÇAS, H. M. McNAIR, J. Liq. Chromatogr., 8 (1985) 239.
F. M. LANÇAS, H. M. McNAIR, H. S. KARAM, E. CARRILHO, Fuel Sci. Tech. Int'l., 6 (1988) 203.
E. B. CARAMÃO, L. M. F. GOMES, M. D. OLIVEIRA, F. M. LANÇAS, J. High. Resol. Chromatogr., 10 (1987) 579.
E. B. CARAMÃO, L. M. F. GOMES, A. BRISTOTI, F. M. LANÇAS, Fuel Sci. Tech. Int'l., 8 (1990) 173.
D. M. P. DIBO, Radiation-Induced Effects on Coal Asphaltenes, Thesis, University of São Paulo, 1988.
J. G. SPEIGHT, S. E. MOSCHOPEDIS, On the Molecular Nature of Petroleum Asphaltenes, American Chemical Society, Washington, D. C. 1979.
M. J. MINA, H. SCHULTZ, W. E. MC KIMSTRY, Method for the Determination of Benzene Insoluble Asphaltenes and Oils in Coal-Derived Liquids, Pittsburgh Energy Research Center, 1976.
B. I. LOSEV, M. A. TRAYANOVSKAYA, E. A. BYLYNA, Dokl. Akad. Nauk. SSSR, 120 (1958) 314.
E. J. HENLEY, L. KARAYSK, Fuel, 40 (1961) 155.
A. ROEGER III, J. A. HAMMOND, P. L. WALTER, Jr., Fuel, 43 (1964) 357.
N. SENISE, Y. CHEN, M. SCHNITZER, Fuel, 56 (1977) 171.
F. M. LANÇAS, J. Radioanal. Nucl. Chem., 142 (1990) 425.
F. M. LANÇAS, H. S. KARAM, H. M. McNAIR, Am. Chem. Soc. Fuel Chem. Div. Prepr., 30 (1985) 273.
E. B. CARAMAO, L. F. M. GOMES, A. BRISTOTI, F. M. LANÇAS, Fuel. Sci. Tech. Int'l, 8 (1990) 881.
F. M. LANÇAS, H. M. McNAIR, J. Liq. Chromatogr., 8 (1985) 239.
F. M. LANÇAS, H. M. McNAIR, H. S. KARAM, E. CARRILHO, Fuel Sci. Tech. Int'l, 6 (1988) 95.
H. S. KARAM, H. M. McNAIR, F. M. LANÇAS, Lc Gc, 5 (1987) 41.
F. M. LANÇAS, E. CARRILHO, G. D. H. DEANE, M. C. F. CAMILO, J. High Resol. Chromatogr., 12 (1989) 368.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lanças, F.M., Carrilho, E. & Dibo, D.M.P. Radiation-induced effects on alternative fuels. Journal of Radioanalytical and Nuclear Chemistry, Articles 158, 283–292 (1992). https://doi.org/10.1007/BF02047115
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02047115