Preparation of microdispersed droplets by phase inversion in gas/liquid/liquid microdispersion system

Ya Ni Ji, Wen Jie Geng, Chun Yang Ma, Jing Tan*, Wen Sheng Deng, Bin Liu, Yue Feng Su

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

A simple and effective method was conducted for preparing microdispersed droplets with decreased size and increased uniformity, in which phase inversion in high-phase-ratio liquid/liquid system was combined with addition of microbubbles. Five typical flow patterns were observed, including W/O, O/W/O, transition regime, O/W and G/W/O regimes. Flow regime transition was observed, according to which physical properties of systems and operating conditions for preparing single-oil-droplet-in-water emulsion were determined in different liquid/liquid and gas/liquid/liquid modes. Effects of liquid viscosities as well as interfacial tension on droplet size (DO) and its standard deviation (SD) were studied systematically and the most effective gas/liquid/liquid mode was recommended. Mathematical models were established for correlating DO in five different modes, which show relatively good agreement with experimental results. DO decreases by 42% via introducing phase inversion and further reduces to 25% by addition of microbubbles, both under the same operating conditions.

Original languageEnglish
Article number115498
JournalChemical Engineering Science
Volume217
DOIs
Publication statusPublished - 18 May 2020

Keywords

  • Emulsion preparation
  • Flow regime transition
  • Gas/liquid/liquid system
  • Microdisperion
  • Modeling and correlation
  • Phase inversion

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Ji, Y. N., Geng, W. J., Ma, C. Y., Tan, J., Deng, W. S., Liu, B., & Su, Y. F. (2020). Preparation of microdispersed droplets by phase inversion in gas/liquid/liquid microdispersion system. Chemical Engineering Science, 217, Article 115498. https://doi.org/10.1016/j.ces.2020.115498