Investigation of Physical Chemistry Properties of Asphaltenes Using Solubility Parameters of Asphaltenes and Their Fractions A1 and A2
| Autor: | Alexandra Castro, Sócrates Acevedo, María Antonieta Ranaudo, Edgardo Vásquez, Francia Marcano |
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| Rok vydání: | 2010 |
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| Zdroj: | Energy & Fuels. 24:5921-5933 |
| ISSN: | 1520-5029 0887-0624 |
| Popis: | The Sphere method developed by Hansen (Hansen, C. M. Hansen Solubility Parameters: A User’s Handbook; CRC Press: Boca Raton, FL, 1999) to calculate components of solubility parameters (SP), δD, δP, and δH, where D, P, and H stand for dispersion, polar, and hydrogen bonding respectively, have been applied to resins, to asphaltenes, and fractions A1 and A2. Mean values for these compounds in MPa0.5 were asphaltenes (19.5 ± 0.1, 4.7 ± 0.2, 4.2 ± 0.1); A2 (19.6 ± 0.1, 5.8 ± 0.1, 4.4 ± 0.2); A1 (20.9 ± 0.2, 5.6 ± 0.3, 6.8 ± 0.2); resins (18.6 ± 0.2, 3.6 ± 0.3, 3.2 ± 0.3). Also, the SP components of the asphaltene sample (AsH-NS), denuded from acidic natural surfactant (NS), were determined affording values equal to A2. These values were obtained after using 57 solvents, and the method is consistent with all known solubility properties of asphaltenes and confirm the expected solubility behavior of A1 and A2, with A1 being the less soluble material in all solvent examined. Excellent affinity between asphaltene w... |
| Databáze: | OpenAIRE |
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