| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 642595 | Separation and Purification Technology | 2011 | 10 Pages |
A gas–liquid–liquid microdispersion system was specially designed to realize a microbubble-agitated extraction process for the intensification of extraction with high phase ratio. The process with the phase ratio larger than 50 for H2O2 extraction was taken as a typical case. A microstructured system with 5 μm pore size microfiltration membranes as the dispersion medium was developed to generate the gas–liquid–liquid microdispersion system. Considering three different microdispersion modes, the most efficient mode was suggested with lower addition of gas, by which the Murphree efficiency could reach higher than 90% and the overall volume mass transfer coefficient could range in 0.2–21.9 s−1, 10–30 times greater than the extraction process without gas addition. A unified mathematical model in the form of KOa=0.8We0.6Φ0.6KOa=0.8We0.6Φ0.6 was developed to predict the mass transfer in liquid–liquid microdispersion extraction process with/without gas addition.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A gas–liquid–liquid microdispersion system is developed to intensify extraction processes. ► H2O2 extraction process with the phase ratio larger than 50 was taken as a typical case. ► The overall volume mass transfer coefficient could range in 0.2–21.9 s−1. ► The enhancement factor of microbubble-agitation was around 10–30. ► A unified mathematical model has been developed.
