Emulsion stabilization by means of combined surfactant multilayer (D-phase) and asphaltene particles

被引：59

作者：

Havre, TE ^{[1
]}

Sjöblom, J ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Ugelstad Lab, Dept Chem Engn, N-7491 Trondheim, Norway

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2003年 / 228卷 / 1-3期

关键词：

emulsion stabilization; naphthenic acids; asphaltene particle; lamellar liquid crystals; electrocoale-scence;

D O I：

10.1016/S0927-7757(03)00302-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The emulsion stability of systems containing paraffinic, aromatic or naphthenic acid, water and heptane/toluene was investigated at different pH. High pH (around 11) gave rise to o/w emulsions with high stability. A decrease in pH reduced the emulsion stability significantly. In order to prepare stable w/o emulsions, D-phase samples were used. In addition to the multilayer stabilization, asphaltene nano-particles were mixed with the D-phase samples and used as stabilizers. It was shown that a combination of 60% asphaltene particles and 40% D-phase gave the most stable w/o-emulsions. All w/o-emulsion stabilities were evaluated by means of critical electric fields (E-crit). This investigation verifies the importance of D-phase stabilization in combination with asphaltene particles in systems with acidic heavy crude oil (including bitumen) and water. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：131 / 142

页数：12

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