Predicting the effect of membrane spacers on mass transfer

Abhishek Shrivastava; Satish Kumar; E. L. Cussler

doi:10.1016/j.memsci.2008.05.060

Predicting the effect of membrane spacers on mass transfer

Abhishek Shrivastava, Satish Kumar, E. L. Cussler

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

Abstract

Like many separation processes, ultrafiltration and reverse osmosis are often compromised by concentration polarization. Such polarization can be mitigated by static mixers and other flow barriers placed as spacers next to the membrane surface. These spacers can be shaped like ladders, herringbones, and helices. The effect of these spacers can be successfully predicted without adjustable parameters from extensions of the Lévêque equation. The predictions are in agreement with results of computational fluid mechanics and with electrochemical experiments. They supply a tool for optimizing spacer design.

Original language	English (US)
Pages (from-to)	247-256
Number of pages	10
Journal	Journal of Membrane Science
Volume	323
Issue number	2
DOIs	https://doi.org/10.1016/j.memsci.2008.05.060
State	Published - Oct 15 2008

Bibliographical note

Funding Information:
Nathan Craig helped make the electrochemical measurements. The work was partially supported by the Petroleum Research Fund of the American Chemical Society. Other support came from the United States Air Force Office of Scientific Research.

Keywords

Concentration polarization
Reverse osmosis
Spacers
Ultrafiltration

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10.1016/j.memsci.2008.05.060

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title = "Predicting the effect of membrane spacers on mass transfer",

abstract = "Like many separation processes, ultrafiltration and reverse osmosis are often compromised by concentration polarization. Such polarization can be mitigated by static mixers and other flow barriers placed as spacers next to the membrane surface. These spacers can be shaped like ladders, herringbones, and helices. The effect of these spacers can be successfully predicted without adjustable parameters from extensions of the L{\'e}v{\^e}que equation. The predictions are in agreement with results of computational fluid mechanics and with electrochemical experiments. They supply a tool for optimizing spacer design.",

keywords = "Concentration polarization, Reverse osmosis, Spacers, Ultrafiltration",

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AU - Shrivastava, Abhishek

AU - Kumar, Satish

AU - Cussler, E. L.

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PY - 2008/10/15

Y1 - 2008/10/15

N2 - Like many separation processes, ultrafiltration and reverse osmosis are often compromised by concentration polarization. Such polarization can be mitigated by static mixers and other flow barriers placed as spacers next to the membrane surface. These spacers can be shaped like ladders, herringbones, and helices. The effect of these spacers can be successfully predicted without adjustable parameters from extensions of the Lévêque equation. The predictions are in agreement with results of computational fluid mechanics and with electrochemical experiments. They supply a tool for optimizing spacer design.

AB - Like many separation processes, ultrafiltration and reverse osmosis are often compromised by concentration polarization. Such polarization can be mitigated by static mixers and other flow barriers placed as spacers next to the membrane surface. These spacers can be shaped like ladders, herringbones, and helices. The effect of these spacers can be successfully predicted without adjustable parameters from extensions of the Lévêque equation. The predictions are in agreement with results of computational fluid mechanics and with electrochemical experiments. They supply a tool for optimizing spacer design.

KW - Concentration polarization

KW - Reverse osmosis

KW - Spacers

KW - Ultrafiltration

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ER -

Predicting the effect of membrane spacers on mass transfer

Abstract

Bibliographical note

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