Phase behavior of binary mixture of asphaltene + solvent and ternary mixture of asphaltene + solvent + precipitant

Asphaltene precipitation is a perennial problem in producing and refining crude oils. To study asphaltene precipitation, it is useful to model the solubility of asphaltenes in petroleum fluids as a function of temperature and liquid-phase composition. In this work a polymer solution model is used fo...

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Bibliographic Details
Published in:Fluid phase equilibria 2006-01, Vol.245 (2), p.117-124
Main Authors: Orangi, Hamid Sh, Modarress, Hamid, Fazlali, A., Namazi, M.H.
Format: Article
Language:English
Subjects:
Applied sciences
Asphaltene precipitation
Crude oil
Crude oil, natural gas and petroleum products
Energy
Exact sciences and technology
Fuels
Phase diagrams
Polymer solvent mixtures
Prospecting and production of crude oil, natural gas, oil shales and tar sands
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Summary:Asphaltene precipitation is a perennial problem in producing and refining crude oils. To study asphaltene precipitation, it is useful to model the solubility of asphaltenes in petroleum fluids as a function of temperature and liquid-phase composition. In this work a polymer solution model is used for asphaltene precipitation in two cases. In the first case a binary mixture is considered which consists of asphaltene as a polymer component and crude oil as the solvent. In the second case ap ternary mixture is considered which consists of asphaltene as a polymer component and crude oil as the solvent and a precipitant as the third component. The phase diagrams and phase stability limits obtained for a sample of crude oil with four different precipitants are presented.
ISSN:0378-3812
1879-0224
DOI:10.1016/j.fluid.2006.04.018