ELEMENTAL COMPOSITION OF ASPHALTENES FROM COAL LIQUEFACTION
| Autor: | A. Torres, M.J. Chomón, V. Rodriguez, I. de Marco |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
business.industry
technology industry and agriculture Energy Engineering and Power Technology Liquefaction respiratory system Coal liquefaction complex mixtures Toluene respiratory tract diseases Autoclave Pentane chemistry.chemical_compound Fuel Technology chemistry otorhinolaryngologic diseases Organic chemistry Coal Tetralin business Asphaltene Nuclear chemistry |
| Zdroj: | Fuel Science and Technology International. 13:1345-1353 |
| ISSN: | 0884-3759 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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