Civil Engineering:

Title:           Numerical Modelling and Simulation of Demulsification Kinetics of Bitumen in Water Emulsion due to Varying Salinity
Authors:      O.S. Alade, Kyuro Sasaki, Y. Sugai, B. Ademodi, M. Nakano
Abstract:     In this study, bitumen-in-water emulsion was formed in the aqueous solution containing 0.5 %w/w of hydrophilic polymeric surfactant; Poly Vinyl Alcohol (PVA) and dissolved salt ranging from 0.5 – 3.5 %w/w. The rate of water separation from the emulsion was monitored in the real time by subjecting the emulsions to gravity settling under isothermal condition. Data collected were used in developing a kinetic model to predict the stability of the emulsion. It was observed that the destabilization constant Ks decreased when the salt content in the aqueous phase increased to 0.5 %w/w, and increased thereafter from salt content of 1 %w/w to 3.5 %w/w. The model developed has been found to be adequate in predicting the emulsion stability.

Keywords:   Emulsification, Stability, Demulsification, Bitumen, PVA
Pages:         206-208

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