Membrane gas transfer under conditions of creeping flow: Modeling gas composition effects

Y. Fang; L. W. Clapp; R. M. Hozalski; P. J. Novak; M. J. Semmens

doi:10.1016/j.watres.2004.03.011

Membrane gas transfer under conditions of creeping flow: Modeling gas composition effects

Y. Fang, L. W. Clapp, R. M. Hozalski, P. J. Novak, M. J. Semmens

Civil, Environmental, and Geo- Engineering

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7 Scopus citations

Abstract

A computational model was developed to predict gas transfer and gas composition changes in membrane modules designed for addition of gases to groundwater. The model was verified using pilot-scale gas transfer experiments. The modeling and experimental results suggest that back diffusion of dissolved gases into the membrane has a significant effect on gas transfer via hollow-fiber membrane. In the experimental study, N₂ back-diffusion reduced the partial pressure of O₂ within the membrane and decreased the concentration gradient for gas transfer. The model was able to simulate both the dynamic and steady-state gas transfer behavior of the membranes under a variety of operating conditions. This model can be used to estimate gas transfer as a function of different membrane module design and operating conditions.

Original language	English (US)
Pages (from-to)	2489-2498
Number of pages	10
Journal	Water Research
Volume	38
Issue number	10
DOIs	https://doi.org/10.1016/j.watres.2004.03.011
State	Published - May 2004

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title = "Membrane gas transfer under conditions of creeping flow: Modeling gas composition effects",

abstract = "A computational model was developed to predict gas transfer and gas composition changes in membrane modules designed for addition of gases to groundwater. The model was verified using pilot-scale gas transfer experiments. The modeling and experimental results suggest that back diffusion of dissolved gases into the membrane has a significant effect on gas transfer via hollow-fiber membrane. In the experimental study, N2 back-diffusion reduced the partial pressure of O2 within the membrane and decreased the concentration gradient for gas transfer. The model was able to simulate both the dynamic and steady-state gas transfer behavior of the membranes under a variety of operating conditions. This model can be used to estimate gas transfer as a function of different membrane module design and operating conditions.",

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AU - Clapp, L. W.

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AU - Novak, P. J.

AU - Semmens, M. J.

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AB - A computational model was developed to predict gas transfer and gas composition changes in membrane modules designed for addition of gases to groundwater. The model was verified using pilot-scale gas transfer experiments. The modeling and experimental results suggest that back diffusion of dissolved gases into the membrane has a significant effect on gas transfer via hollow-fiber membrane. In the experimental study, N2 back-diffusion reduced the partial pressure of O2 within the membrane and decreased the concentration gradient for gas transfer. The model was able to simulate both the dynamic and steady-state gas transfer behavior of the membranes under a variety of operating conditions. This model can be used to estimate gas transfer as a function of different membrane module design and operating conditions.

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Membrane gas transfer under conditions of creeping flow: Modeling gas composition effects

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