Loading…
The influence of polarity on flux and rejection behaviour in solvent resistant nanofiltration - experimental observations
The separation characteristics of a dense polydimethylsiloxane (PDMS) membrane were studied using mixtures comprising xylene, cyclohexane or n-heptane with oxygenate components at concentrations up to 75%. The effects of polarity on flux and rejection performance were determined through a test matri...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Default Article |
| Published: |
2006
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/2134/4782 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1818175065543409664 |
|---|---|
| author | Steve Tarleton J.P. Robinson C.R. Millington Arian Nijmeijer M.L. Taylor |
| author_facet | Steve Tarleton J.P. Robinson C.R. Millington Arian Nijmeijer M.L. Taylor |
| author_sort | Steve Tarleton (1253502) |
| collection | Figshare |
| description | The separation characteristics of a dense polydimethylsiloxane (PDMS) membrane were studied using mixtures comprising xylene, cyclohexane or n-heptane with oxygenate components at concentrations up to 75%. The effects of polarity on flux and rejection performance were determined through a test matrix of solvent type, concentration, filtration pressure, crossflow rate and the degree of membrane crosslinking. In all cases involving alcohols, the more polar compound in the feed mixture was partially rejected by the membrane and the extent of rejection was dependent on the polarity as quantified by solubility parameter. The rejection-concentration profiles for several alcohol/solvent mixtures exhibited a maximum, with the highest rejection around 30%. Mixtures containing MTBE did not separate, i.e. no rejection was observed. Rejection increased with increasing pressure and crossflow rate but was largely unaffected by the degree of membrane crosslinking. Component flux was affected by the oxygenate concentration in the mixture, which was attributed in part to changes in the degree of membrane swelling with composition. Experimental findings suggest that the separation is primarily governed by multicomponent solvent/oxygenate/membrane swelling equilibria, and results compare favourably with swelling isotherms available in the open literature. |
| format | Default Article |
| id | rr-article-9241661 |
| institution | Loughborough University |
| publishDate | 2006 |
| record_format | Figshare |
| spelling | rr-article-92416612006-01-01T00:00:00Z The influence of polarity on flux and rejection behaviour in solvent resistant nanofiltration - experimental observations Steve Tarleton (1253502) J.P. Robinson (7128623) C.R. Millington (7128626) Arian Nijmeijer (1465378) M.L. Taylor (7128971) Chemical engineering not elsewhere classified Nanofiltration SRNF Membrane PDMS Non-aqueous Organic solvents Osmotic pressure Rejection Swelling Solution-diffusion Chemical Engineering not elsewhere classified The separation characteristics of a dense polydimethylsiloxane (PDMS) membrane were studied using mixtures comprising xylene, cyclohexane or n-heptane with oxygenate components at concentrations up to 75%. The effects of polarity on flux and rejection performance were determined through a test matrix of solvent type, concentration, filtration pressure, crossflow rate and the degree of membrane crosslinking. In all cases involving alcohols, the more polar compound in the feed mixture was partially rejected by the membrane and the extent of rejection was dependent on the polarity as quantified by solubility parameter. The rejection-concentration profiles for several alcohol/solvent mixtures exhibited a maximum, with the highest rejection around 30%. Mixtures containing MTBE did not separate, i.e. no rejection was observed. Rejection increased with increasing pressure and crossflow rate but was largely unaffected by the degree of membrane crosslinking. Component flux was affected by the oxygenate concentration in the mixture, which was attributed in part to changes in the degree of membrane swelling with composition. Experimental findings suggest that the separation is primarily governed by multicomponent solvent/oxygenate/membrane swelling equilibria, and results compare favourably with swelling isotherms available in the open literature. 2006-01-01T00:00:00Z Text Journal contribution 2134/4782 https://figshare.com/articles/journal_contribution/The_influence_of_polarity_on_flux_and_rejection_behaviour_in_solvent_resistant_nanofiltration_-_experimental_observations/9241661 CC BY-NC-ND 4.0 |
| spellingShingle | Chemical engineering not elsewhere classified Nanofiltration SRNF Membrane PDMS Non-aqueous Organic solvents Osmotic pressure Rejection Swelling Solution-diffusion Chemical Engineering not elsewhere classified Steve Tarleton J.P. Robinson C.R. Millington Arian Nijmeijer M.L. Taylor The influence of polarity on flux and rejection behaviour in solvent resistant nanofiltration - experimental observations |
| title | The influence of polarity on flux and rejection behaviour in solvent resistant nanofiltration - experimental observations |
| title_full | The influence of polarity on flux and rejection behaviour in solvent resistant nanofiltration - experimental observations |
| title_fullStr | The influence of polarity on flux and rejection behaviour in solvent resistant nanofiltration - experimental observations |
| title_full_unstemmed | The influence of polarity on flux and rejection behaviour in solvent resistant nanofiltration - experimental observations |
| title_short | The influence of polarity on flux and rejection behaviour in solvent resistant nanofiltration - experimental observations |
| title_sort | influence of polarity on flux and rejection behaviour in solvent resistant nanofiltration - experimental observations |
| topic | Chemical engineering not elsewhere classified Nanofiltration SRNF Membrane PDMS Non-aqueous Organic solvents Osmotic pressure Rejection Swelling Solution-diffusion Chemical Engineering not elsewhere classified |
| url | https://hdl.handle.net/2134/4782 |