Generalized criterion for the onset of particle deposition in crossflow microfiltration via DOTM : modeling and experimental validation
The concept of a critical permeation flux for the onset of particle deposition in crossflow microfiltration (CFMF) is well-established. However, the critical flux is known to be a function of process parameters such as the particle size, bulk concentration and crossflow velocity. In the present stud...
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/104975 http://hdl.handle.net/10220/20324 http://dx.doi.org/10.1016/j.memsci.2014.01.002 |
| _version_ | 1811695016795439104 |
|---|---|
| author | Zamani, Farhad Wicaksana, Filicia Taheri, Amir H. Law, Adrian Wing-Keung Fane, Anthony Gordon Krantz, William B. |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Zamani, Farhad Wicaksana, Filicia Taheri, Amir H. Law, Adrian Wing-Keung Fane, Anthony Gordon Krantz, William B. |
| author_sort | Zamani, Farhad |
| collection | NTU |
| description | The concept of a critical permeation flux for the onset of particle deposition in crossflow microfiltration (CFMF) is well-established. However, the critical flux is known to be a function of process parameters such as the particle size, bulk concentration and crossflow velocity. In the present study, the critical modified Peclet number (Pecrit) is explored instead as a generalized criterion for the onset of particle deposition that incorporates the effects of these process parameters as well as the axial position along the membrane. A proper determination of Pecrit requires an accurate prediction of the concentration polarization boundary layer thickness δc and shear-induced diffusion coefficient Ds. The classical Lévêque model is adapted to allow for the effect of the permeation flux on the velocity profile. Moreover, the assumptions of a constant concentration at the membrane surface cw and constant Ds that have been made in prior studies are relaxed in an improved numerical solution to the convective diffusion equation that is used to predict δc and Ds. The critical permeation flux is determined from particle deposition data taken for 6 and 10 μm latex spheres via Direct Observation Through the Membrane (DOTM) characterization. A constant value of Pecrit=4.00±0.08 is found to characterize the effects of particle diameter, bulk concentration and crossflow velocity as well as axial position on the onset of particle deposition. |
| first_indexed | 2024-10-01T07:16:46Z |
| format | Journal Article |
| id | ntu-10356/104975 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:16:46Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1049752019-12-06T21:43:54Z Generalized criterion for the onset of particle deposition in crossflow microfiltration via DOTM : modeling and experimental validation Zamani, Farhad Wicaksana, Filicia Taheri, Amir H. Law, Adrian Wing-Keung Fane, Anthony Gordon Krantz, William B. School of Civil and Environmental Engineering Singapore Membrane Technology Centre DRNTU::Engineering::Environmental engineering::Water treatment The concept of a critical permeation flux for the onset of particle deposition in crossflow microfiltration (CFMF) is well-established. However, the critical flux is known to be a function of process parameters such as the particle size, bulk concentration and crossflow velocity. In the present study, the critical modified Peclet number (Pecrit) is explored instead as a generalized criterion for the onset of particle deposition that incorporates the effects of these process parameters as well as the axial position along the membrane. A proper determination of Pecrit requires an accurate prediction of the concentration polarization boundary layer thickness δc and shear-induced diffusion coefficient Ds. The classical Lévêque model is adapted to allow for the effect of the permeation flux on the velocity profile. Moreover, the assumptions of a constant concentration at the membrane surface cw and constant Ds that have been made in prior studies are relaxed in an improved numerical solution to the convective diffusion equation that is used to predict δc and Ds. The critical permeation flux is determined from particle deposition data taken for 6 and 10 μm latex spheres via Direct Observation Through the Membrane (DOTM) characterization. A constant value of Pecrit=4.00±0.08 is found to characterize the effects of particle diameter, bulk concentration and crossflow velocity as well as axial position on the onset of particle deposition. Accepted version 2014-08-18T04:41:35Z 2019-12-06T21:43:54Z 2014-08-18T04:41:35Z 2019-12-06T21:43:54Z 2014 2014 Journal Article Zamani, F., Wicaksana, F., Taheri, A. H., Law, A. W. K., Fane, A. G., & Krantz, W. B. (2014). Generalized criterion for the onset of particle deposition in crossflow microfiltration via DOTM – Modeling and experimental validation. Journal of Membrane Science, 457, 128-138. 0376-7388 https://hdl.handle.net/10356/104975 http://hdl.handle.net/10220/20324 http://dx.doi.org/10.1016/j.memsci.2014.01.002 en Journal of membrane science © 2014 Elsevier B.V. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of membrane science, Elsevier B.V. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1016/j.memsci.2014.01.002]. 28 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Environmental engineering::Water treatment Zamani, Farhad Wicaksana, Filicia Taheri, Amir H. Law, Adrian Wing-Keung Fane, Anthony Gordon Krantz, William B. Generalized criterion for the onset of particle deposition in crossflow microfiltration via DOTM : modeling and experimental validation |
| title | Generalized criterion for the onset of particle deposition in crossflow microfiltration via DOTM : modeling and experimental validation |
| title_full | Generalized criterion for the onset of particle deposition in crossflow microfiltration via DOTM : modeling and experimental validation |
| title_fullStr | Generalized criterion for the onset of particle deposition in crossflow microfiltration via DOTM : modeling and experimental validation |
| title_full_unstemmed | Generalized criterion for the onset of particle deposition in crossflow microfiltration via DOTM : modeling and experimental validation |
| title_short | Generalized criterion for the onset of particle deposition in crossflow microfiltration via DOTM : modeling and experimental validation |
| title_sort | generalized criterion for the onset of particle deposition in crossflow microfiltration via dotm modeling and experimental validation |
| topic | DRNTU::Engineering::Environmental engineering::Water treatment |
| url | https://hdl.handle.net/10356/104975 http://hdl.handle.net/10220/20324 http://dx.doi.org/10.1016/j.memsci.2014.01.002 |
| work_keys_str_mv | AT zamanifarhad generalizedcriterionfortheonsetofparticledepositionincrossflowmicrofiltrationviadotmmodelingandexperimentalvalidation AT wicaksanafilicia generalizedcriterionfortheonsetofparticledepositionincrossflowmicrofiltrationviadotmmodelingandexperimentalvalidation AT taheriamirh generalizedcriterionfortheonsetofparticledepositionincrossflowmicrofiltrationviadotmmodelingandexperimentalvalidation AT lawadrianwingkeung generalizedcriterionfortheonsetofparticledepositionincrossflowmicrofiltrationviadotmmodelingandexperimentalvalidation AT faneanthonygordon generalizedcriterionfortheonsetofparticledepositionincrossflowmicrofiltrationviadotmmodelingandexperimentalvalidation AT krantzwilliamb generalizedcriterionfortheonsetofparticledepositionincrossflowmicrofiltrationviadotmmodelingandexperimentalvalidation |