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

AUTOR(ES)

Karcher, V., Perrechil, F. A., Bannwart, A. C.

FONTE

Braz. J. Chem. Eng.

DATA DE PUBLICAÇÃO

2015-03

RESUMO

Abstract 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.

Documentos Relacionados

• Droplet Size Distribution in Water-Crude Oil Emulsions by Low-Field NMR
• OPTIMIZATION OF DEMULSIFIER FORMULATION FOR SEPARATION OF WATER FROM CRUDE OIL EMULSIONS
• The influence of asphaltenes subfractions on the stability of crude oil model emulsions
• Mechanical energy from intraocular instruments cause emulsification of silicone oil
• Optimizing the Water-Oil Emulsification Process for Developing CPC Microspheres