Journal of Chemical Engineering & Process Technology
Open Access

Esko Lahdenperä

Publications

• Research Article
  The Mass Transfer and Coalescence Time Scales in Binary Droplet Systems for Copper Extraction
  Author(s): Jussi Tamminen, Esko Lahdenperä, Tuomas Koiranen, Toni Kuronen, Tuomas Eerola, Lasse Lensu and Heikki KälviäinenJussi Tamminen, Esko Lahdenperä, Tuomas Koiranen, Toni Kuronen, Tuomas Eerola, Lasse Lensu and Heikki Kälviäinen
  
  In this work, we studied whether coalescence has a direct effect on mass transfer in copper extraction. The coalescence of pendant and sessile droplets containing diluted Acorga M5640 in an aqueous copper sulfate solution was recorded on video. The videos were analyzed to determine droplet rest times, sizes, and concentrations. Concentration measurements revealed that coalescence does not enhance mass transfer because coalescence is a rapid phenomenon. A comparison of the experiments performed with and without mass transfer showed that the coalescence dynamics are not affected by mass transfer. A bimodal rest time distribution was observed when the copper sulfate solution was in the continuous phase. The surface flows and cell-like structures observed on the droplet interface are presumed to be because of a Marangoni convection, which is caused by concentration changes because of extr.. View More»
  DOI: 10.4172/2157-7048.1000387

  Abstract PDF

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