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- W2039729196 abstract "Abstract The elemental composition (C, H, N, S, O) of asphaltenes isolated from coal liquefaction experiments carried out at different temperatures and tetralin/coal ratios has been determined. The liquefaction experiments were conducted in a 250 ml autoclave, with 10 g of a Spanish subbituminous A coal, for 1 hour, and at 17 ± 1 MPa operating pressure and 400 rpm stirring speed. The liquefaction products were fractionated into oils, asphaltenes and preasphaltenes using pentane, toluene and THF as extractive solvents. The % S and % O are lower in asphaltenes than in coal, while the % C and % N are higher and % H depends on the temperature and tetralin/coal ratio used. On the other hand asphaltenes % C decreases, and % H and % O increase as the tetralin/coal ratio is raised at every temperature except 475 °C, while % S and % N do not have a clear variation." @default.
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- W2039729196 date "1995-11-01" @default.
- W2039729196 modified "2023-10-16" @default.
- W2039729196 title "ELEMENTAL COMPOSITION OF ASPHALTENES FROM COAL LIQUEFACTION" @default.
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- W2039729196 doi "https://doi.org/10.1080/08843759508947741" @default.
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