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|Type:||Artigo de evento|
|Title:||Phase Behavior Of Propane/crude Oil Mixture In Supecritical Fluid Extraction|
|Abstract:||Studies of petroleum asphaltenes have gained considerable attention in the past decades due to the increase of heavy crude oils. The reduction of light crude oil reservoirs and the increasing light oil demand, forced the petroleum industry to develop upgrading processes for raw materials and residues. The crudes contain large amounts of asphaltenes and resins. Supercritical fluid extraction (SFE) has found application in solvent extraction, separation processes and in the upgrading of petroleum feedstocks. The SFE concept is also of interest in enchanced oil recovery processes since the performance of these processes depends on the extraction of oil typically in a supercritical state. The Residuum Oil Supercritical Extraction (ROSETM) use of paraffinic solvents to upgrade heavy oils to produce deasphalting oil suitable. The deasphalted oil and the solvent are heated further to a supercritical state and the deasphalted oil is separated from the solvent. For design and evaluation of supercritical fluid extraction process, it is necessary to have reliable phase behavior data. The lack of information available in the literature concerning asphaltene's properties through a thermodynamic approach, for separation processes, makes it necessary to intensify the scientific contributions in that aspect. This work presents a phase behavior study for the separation of Oil-Asphaltene mixtures using supercritical propane. The selection of propane as a solvent for this system is due to its excellent solvent power and good selectivity. The phase behavior of the ternary mixture was modeled by using the Predictive Soave-Redlich-Kwong (PSRK). The ternary diagrams generated to illustrate the system's behavior were constructed throughout variations in pressure and temperature around the solvent's critical point. Furthermore, pseudo-components are also evaluated and compared with the ternary mixture, where a molecule of asphaltene must be created through group contribution method. These results were very important to establish the simulation ambient to the virtual supercritical deasphalting plant. Keywords: Deasphalting, Supercritical, Heavy Crude, Propane. Copyright © 2009, AIDIC Servizi S.r.l.|
|Editor:||Italian Association of Chemical Engineering - AIDIC|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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