Drop size distribution monitoring of oil-in-water emulsions in SMX+ static mixers: Effect of operating and geometrical conditions
| Autor: | Sébastien Urbaniak, Elodie Chabanon, Nida Sheibat-Othman, Jean-Pierre Valour, O. Mdere, François Puel |
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| Přispěvatelé: | Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Fluid Flow and Transfer Processes
Pressure drop Coalescence (physics) Materials science Turbulence Mechanical Engineering Drop (liquid) viscous fluids Oil-in-water emulsions General Physics and Astronomy 02 engineering and technology Mechanics Process Modelling 021001 nanoscience & nanotechnology Breakup Volumetric flow rate 020401 chemical engineering high volume fraction Mass transfer Volume fraction [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering 0204 chemical engineering 0210 nano-technology SMX+ static mixers |
| Zdroj: | International Journal of Multiphase Flow International Journal of Multiphase Flow, Elsevier, 2017, 92, pp.61-69. ⟨10.1016/j.ijmultiphaseflow.2017.03.001⟩ |
| ISSN: | 0301-9322 |
| Popis: | International audience; Static mixers provide enhanced mixing via a motionless element inside a rigid pipe, and are widely used for continuous mixing and blending in industry. This study focuses on the emulsification of a silicon oil-in-water system stabilized by a surfactant through SMX+ ® static mixers involving no mass transfer between the two phases. The experiments covered a large domain of dispersed fraction from dilute conditions (5 %vol.) up to concentrated ones (60 %vol.) close to phase inversion and three different viscosities from 20 to 350 mPa s with transitional or turbulent flow regimes. The number of static mixers was studied until a constant drop size distribution monitored at line with a video probe was obtained. With the considered flow rates, only the five first SMX+ elements were necessary to achieve a complete drop breakup and coalescence equilibrium, the following ones only causing a supplementary pressure drop. The influence of the number of SMX+ and energy dissipation rate was found to be of first order 2 compared to the volume fraction or viscosity of the dispersed phase. According to the large amount of data, it was possible to establish a new form of a Middleman correlation dedicated to this type of mixer of new generation. The formula takes into account the number of static mixers besides other hydrodynamic and physicochemical parameters. |
| Databáze: | OpenAIRE |
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