Recycle effect on membrane extraction through cross-flow rectangular modules
| Autor: | Hsian-Hau Cheng, Min-Jie Hsieh, Ho-Ming Yeh |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Fractional distillation
Chromatography Chemistry Applied Mathematics General Chemical Engineering Extraction (chemistry) General Chemistry Industrial and Manufacturing Engineering Membrane technology Methyl isobutyl ketone chemistry.chemical_compound Membrane Chemical engineering Mass transfer Heat transfer Heat exchanger |
| Zdroj: | Chemical Engineering Science. 57:2457-2466 |
| ISSN: | 0009-2509 |
| DOI: | 10.1016/s0009-2509(02)00136-7 |
| Popis: | The effects of recycle on membrane extraction through a cross-flow rectangular module have been studied both theoretically and experimentally. Theoretical analysis of mass transfer in cross-flow device with and without recycle is analogous to heat transfer in cross-flow heat exchangers. Experiments were carried out with the use of a membrane sheet made of microporous polypropylene as a permeable barrier to extract acetic acid from aqueous solution by methyl isobutyl ketone. Theoretical predictions are in agreement with the experimental results. In contrast to a device without recycle, improvement in mass transfer is achievable if cross-flow membrane extraction is operated in a device of same size with recycle which provides the increase of fluid velocity, resulting in reduction of mass-transfer resistance. It is shown that recycle can enhance mass transfer, especially for large feed-concentration solution with high distribution coefficient operated under high reflux ratio. |
| Databáze: | OpenAIRE |
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