INTERFACIAL ENERGY DURING THE EMULSIFICATION OF WATER-IN-HEAVY CRUDE OIL EMULSIONS

被引：22
|
作者：
Karcher, V. [1 ]
Perrechil, F. A. [2 ]
Bannwart, A. C. [1 ]
机构：
[1] Univ Estadual Campinas, UNICAMP, Fac Mech Engn, Dept Petr Engn, BR-13083860 Campinas, SP, Brazil
[2] Univ Estadual Campinas, UNICAMP, Ctr Petr Studies, BR-13083970 Campinas, SP, Brazil
来源：
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING | 2015年 / 32卷 / 01期
关键词：
Emulsion; Interfacial energy; Energy balance; Droplet size; SIZE-DISTRIBUTION; DROPLETS; DESTABILIZATION; FLOW;
D O I：
10.1590/0104-6632.20150321s00002696
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The aim of this study was to investigate the interfacial energy involved in the production of water-in-oil (W/O) emulsions composed of water and a Brazilian heavy crude oil. For such purpose an experimental set-up was developed to measure the different energy terms involved in the emulsification process. W/O emulsions containing different water volume fractions (0.1, 0.25 and 0.4) were prepared in a batch calorimeter by using a high-shear rotating homogenizer at two distinct rotation speeds (14000 and 22000 rpm). The results showed that the energy dissipated as heat represented around 80% of the energy transferred to the emulsion, while around 20% contributed to the internal energy. Only a very small fraction of the energy (0.02 - 0.06%) was stored in the water-oil interface. The results demonstrated that the high energy dissipation contributes to the kinetic stability of the W/O emulsions.
引用
收藏
页码：127 / 137
页数：11
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