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Titolo:
Description of asphaltene polydispersity and precipitation by means of thermodynamic model of self-assembly
Autore:
Victorov, AI; Smirnova, NA;
Indirizzi:
St Petersburg State Univ, Dept Chem, St Petersburg 198904, Russia St Petersburg State Univ St Petersburg Russia 198904 burg 198904, Russia
Titolo Testata:
FLUID PHASE EQUILIBRIA
, volume: 160, anno: 1999,
pagine: 471 - 480
SICI:
0378-3812(199906)160:<471:DOAPAP>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
X-RAY-SCATTERING; PETROLEUM FLUIDS; AGGREGATION; MICELLIZATION; SPECTROSCOPY; FLOCCULATION; TEMPERATURE; AMPHIPHILES; PRESSURE; OIL;
Keywords:
model; method of calculation; micelles; asphaltene; polydispersity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Victorov, AI Stssiaersburg State Univ, Dept Chem, Univ Prosp 2, St Petersburg 198904, Ru St Petersburg State Univ Univ Prosp 2 St Petersburg Russia 198904
Citazione:
A.I. Victorov e N.A. Smirnova, "Description of asphaltene polydispersity and precipitation by means of thermodynamic model of self-assembly", FLU PH EQUI, 160, 1999, pp. 471-480

Abstract

A thermodynamic approach describing the precipitation of asphaltene materials from petroleum fluids as a consequence of aggregate break-up is presented. The aggregation equilibrium for asphaltenes and resins is considered along with the bulk-phase equation of state (EOS) to account for the effects of pressure and solvents on the thermodynamic behavior of asphaltene dispersions. Polydispersity of asphaltene aggregates is taken into account. The effect of the resin molecular shape on the size distribution is considered. Relation between the shape factors and elastic constants of the resin shellof the aggregates is given. Precipitation curves for several real crude oil mixtures are calculated and structural characteristics of the aggregates are estimated. Comparison with the experimental data shows that the resultsare reasonable. (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 04:23:47