Turbulent liquid–liquid dispersion in SMV static mixer at high dispersed phase concentration

Abstract

The aim of this paper is to investigate the influence of physico-chemical parameters on liquid-liquid dispersion at high dispersed phase concentration in Sulzer SMV TM mixer. Four different oil-in-water systems involving two different surfactants are used in order to evaluate the effect of interfacial tension, densities and viscosities ratio on mean droplets size diameters. Moreover the influence of the dispersed phase concentration on the pressure drop as well as on the droplet size distribution is investigated. Two different droplets size distribution analysis techniques are used in order to compare the resulting Sauter mean diameters. The comparison between residence time in the mixer and surfactants adsorption kinetics leads to take into account the evolution of the interfacial tension between both phases at short times. Finally experimental results are correlated as a function of dimensionless Reynolds and Weber numbers.

WITHDRAWN: Liquid–liquid flow regimes and mass transfer in various micro-reactors

“…They dissipate energy continuously throughout the reactor's volume and generate a dispersion smaller in size than slugs [23][24][25]. The drawback of this approach is a generally greater pressure loss and/or lower residence time.…”

Liquid–liquid dispersion in a continuous oscillatory baffled reactor – Application to suspension polymerization

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“…It has to be stable enough to prevent from coalescence and destabilization in course of polymerization. Different continuous processes are available to create liquid-liquid dispersion including membrane [13], rotor-stator [14], static mixer [15][16][17], colloid mills [14,18], high pressure homogenizer [19], mixer-settler [20] and pulsed column [21,22]. A remarkable feature of continuous liquid-liquid dispersion processes are their ability to create quickly droplet of controlled size.…”

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“…5.4: A pulsating reactor from NiTech that provides a large gain in reaction volume [42]. 5.4: A pulsating reactor from NiTech that provides a large gain in reaction volume [42].…”