Dry-casting : computer simulation, sensitivity analysis, experimental and phenomenological model studies
A model for the dry-casting process for polymeric membrane formation is generalized to include a broader spectrum of boundary conditions. This model is used to conduct a sensitivity analysis to assess which properties and process parameters are most influential and hence need to be determined most...
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sg-ntu-dr.10356-877132020-03-07T12:48:43Z Dry-casting : computer simulation, sensitivity analysis, experimental and phenomenological model studies Krantz, William B. Greenberg, Alan R. Hellman, Diana J. Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre DRNTU::Science A model for the dry-casting process for polymeric membrane formation is generalized to include a broader spectrum of boundary conditions. This model is used to conduct a sensitivity analysis to assess which properties and process parameters are most influential and hence need to be determined most accurately. The model predictions are relatively insensitive to changes in the nonsolvent/polymer and nonsolvent/solvent friction coefficients but moderately sensitive to changes in the solvent/polymer friction coefficient. However, the predictions are very sensitive to changes in the gas-phase mass-transfer coefficient, which needs to be well-characterized and carefully controlled during the dry-casting process. Experimental studies for the water/acetone/cellulose acetate system demonstrate that changes in the boundary conditions can result in dramatically different membrane morphologies. The results of the modeling, sensitivity analysis and experimental studies are used to advance a simple phenomenological model for the dry-casting process that explains all the observed trends. This is used to develop a set of design heuristics for dry-casting based on the effect of changes in the properties and parameters on the casting solution and gas-phase mass-transfer resistances, the solvent concentration at the interface and the mass-transfer rate. 2013-07-08T03:42:22Z 2019-12-06T16:47:46Z 2013-07-08T03:42:22Z 2019-12-06T16:47:46Z 2010 2010 Journal Article Krantz, W. B., Greenberg, A. R., & Hellman, D. J. (2010). Dry-casting: Computer simulation, sensitivity analysis, experimental and phenomenological model studies. Journal of Membrane Science, 354(1-2), 178-188. 0376-7388 https://hdl.handle.net/10356/87713 http://hdl.handle.net/10220/11008 10.1016/j.memsci.2010.02.051 en Journal of membrane science © 2010 Elsevier B.V. |
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DRNTU::Science Krantz, William B. Greenberg, Alan R. Hellman, Diana J. Dry-casting : computer simulation, sensitivity analysis, experimental and phenomenological model studies |
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A model for the dry-casting process for polymeric membrane formation is generalized to include a
broader spectrum of boundary conditions. This model is used to conduct a sensitivity analysis to assess
which properties and process parameters are most influential and hence need to be determined most
accurately. The model predictions are relatively insensitive to changes in the nonsolvent/polymer and
nonsolvent/solvent friction coefficients but moderately sensitive to changes in the solvent/polymer friction
coefficient. However, the predictions are very sensitive to changes in the gas-phase mass-transfer
coefficient, which needs to be well-characterized and carefully controlled during the dry-casting process.
Experimental studies for the water/acetone/cellulose acetate system demonstrate that changes in
the boundary conditions can result in dramatically different membrane morphologies. The results of the
modeling, sensitivity analysis and experimental studies are used to advance a simple phenomenological
model for the dry-casting process that explains all the observed trends. This is used to develop a set of
design heuristics for dry-casting based on the effect of changes in the properties and parameters on the
casting solution and gas-phase mass-transfer resistances, the solvent concentration at the interface and
the mass-transfer rate. |
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Nanyang Environment and Water Research Institute |
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Nanyang Environment and Water Research Institute Krantz, William B. Greenberg, Alan R. Hellman, Diana J. |
format |
Article |
author |
Krantz, William B. Greenberg, Alan R. Hellman, Diana J. |
author_sort |
Krantz, William B. |
title |
Dry-casting : computer simulation, sensitivity analysis, experimental and phenomenological model studies |
title_short |
Dry-casting : computer simulation, sensitivity analysis, experimental and phenomenological model studies |
title_full |
Dry-casting : computer simulation, sensitivity analysis, experimental and phenomenological model studies |
title_fullStr |
Dry-casting : computer simulation, sensitivity analysis, experimental and phenomenological model studies |
title_full_unstemmed |
Dry-casting : computer simulation, sensitivity analysis, experimental and phenomenological model studies |
title_sort |
dry-casting : computer simulation, sensitivity analysis, experimental and phenomenological model studies |
publishDate |
2013 |
url |
https://hdl.handle.net/10356/87713 http://hdl.handle.net/10220/11008 |
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1681048435665403904 |