Thermophysical properties and phase-behaviour of asphaltene-containing petroleum fluids

被引：18

作者：

Evdokimov, IN ^{[1
]}

Eliseev, NY ^{[1
]}

Eliseev, DY ^{[1
]}

机构：

[1] Gubkin Russian State Univ Oil & Gas, Dept Phys, Moscow 119991, Russia

来源：

FLUID PHASE EQUILIBRIA | 2003年 / 212卷 / 1-2期

关键词：

crude oil; thermal treatment; pour point; asphaltenes; aggregation;

D O I：

10.1016/S0378-3812(03)00267-X

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

We have measured the effects of a thermal pre-treatment of a crude oil on its pour point T-pour, and on the activation energy of a viscous flow U at 8-30 degreesC. A dramatic increase of both T-pour and U was observed in oil samples pre-heated to temperatures in the specific range from 28-30 to 39-40 degreesC. This effect may be triggered by a structural phase transitions in the oil asphaltene/resin subsystem, resulting in formation of asphaltene molecular aggregates. Below the wax appearance temperature these aggregates evidently act as cementing species in extended networks of wax crystals. The optical absorption measurements revealed an increase of a vertical concentration gradient in the samples, heated to the above specific temperatures, which may be indicative of some phase separation in the studied crude oil. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：269 / 278

页数：10

共 26 条

[21] Petroleum asphaltene-properties, characterization, and issues [J].

Sheu, EY .

ENERGY & FUELS, 2002, 16 (01) :74-82

[22] Viscosity and phase behaviour of petroleum fluids with high asphaltene contents [J].

Werner, A ;

Behar, F ;

de Hemptinne, JC ;

Behar, E .

FLUID PHASE EQUILIBRIA, 1998, 147 (1-2) :343-356

[23] A new viscosity model for petroleum fluids with high asphaltenes content [J].

Werner, A ;

de Hemptinne, JC ;

Behar, F ;

Behar, E ;

Boned, C .

FLUID PHASE EQUILIBRIA, 1998, 147 (1-2) :319-341

[24] An electron spin resonance probe method for the understanding of petroleum asphaltene macrostructure [J].

Wong, GK ;

Yen, TF .

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, 2000, 28 (1-2) :55-64

[25] Crossover kinetics of asphaltene aggregation in hydrocarbon solutions [J].

Yudin, IK ;

Nikolaenko, GL ;

Gorodetskii, EE ;

Markhashov, EL ;

Agayan, VA ;

Anisimov, MA ;

Sengers, JV .

PHYSICA A, 1998, 251 (1-2) :235-244

[26] A compact photon-correlation spectrometer for research and education [J].

Yudin, IK ;

Nikolaenko, GL ;

Kosov, VI ;

Agayan, VA ;

Anisimov, MA ;

Sengers, JV .

INTERNATIONAL JOURNAL OF THERMOPHYSICS, 1997, 18 (05) :1237-1248

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