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Influence of Cavitation and Mixing Conditions on Oil Droplet Size in Simultaneous Homogenization and Mixing (SHM)

Gall, Vanessa; Karbstein, Heike P.

Abstract:
High-pressure homogenizers (HPH) equipped with a Simultaneous Homogenization and Mixing (SHM) orifice allow for inducing a mixing stream directly into the disruption unit. Previous studies show that by doing so, synergies between the unit operations “emulsification” and “mixing” can be used to save energy, e.g., in homogenization of dairy products, or to extend the application range of HPH. Up to now, process design has mainly been based on the trial and error principle due to incomplete understanding of flow conditions and droplet break-up in the SHM unit. This study aims at a higher level of understanding of cavitation and mixing effects on emulsion droplet size. Experimental data were obtained using a model emulsion of low disperse phase concentration in order to avoid coalescence effects. The different flow conditions are created by varying the process and geometric parameters of an SHM unit. The results show that the oil droplet size only depends on mixing conditions when the emulsion droplets are added in the mixing stream. Furthermore, a smaller oil droplet size can be achieved by reducing cavitation, especially for droplets fed in the high-pressure stream.

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Verlagsausgabe §
DOI: 10.5445/IR/1000132148
Veröffentlicht am 04.05.2021
Originalveröffentlichung
DOI: 10.3390/chemengineering4040064
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Bio- und Lebensmitteltechnik (BLT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 09.12.2020
Sprache Englisch
Identifikator ISSN: 2305-7084
KITopen-ID: 1000132148
Erschienen in ChemEngineering
Verlag MDPI
Band 4
Heft 4
Seiten Art. Nr.: 64
Schlagwörter high-pressure homogenization; simultaneous homogenization and mixing; emulsion; oil droplet size; cavitation
Nachgewiesen in Scopus
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