Hydrodynamics and local mass transfer characterization under gas–liquid–liquid slug flow in a rectangular microchannel

Yanyan Liu, Jun Yue, Chao Xu, Shuainan Zhao, Chaoqun Yao*, Guangwen Chen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

16 Citations (Scopus)
266 Downloads (Pure)

Abstract

Gas–liquid–liquid three‐phase slug flow was generated in a glass microreactor with rectangular microchannel, where aqueous slugs were distinguished by relative positions to air bubbles and organic droplets. Oxygen from bubbles reacted with resazurin in slugs, leading to prominent color changes, which was used to quantify mass transfer performance. The development of slug length indicated a film flow through the corner between bubbles and the channel wall, where the aqueous phase was saturated with oxygen transferred from bubble body. This film flow results in the highest equivalent oxygen concentration within the slug led by a bubble and followed by a droplet. The three‐phase slug flow subregime with alternate bubble and droplet was found to benefit the overall mass transfer performance most. These results provide insights into a precise manipulation of gas–liquid–liquid slug flow in microreactors and the relevant mass transfer behavior thereof.
Original languageEnglish
Article numbere16805
Number of pages13
JournalAIChE Journal
Volume66
Issue number2
Early online date16-Sep-2019
DOIs
Publication statusPublished - Feb-2020

Keywords

  • 3-PHASE FLOW
  • SEGMENTED FLOW
  • BUBBLES
  • MILLIREACTORS
  • MICROREACTOR
  • EXTRACTION
  • CHEMISTRY
  • CATALYSIS
  • OXIDATION
  • REACTORS

Cite this