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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/5744

Title: Nanofiltration - a method for solute removal from fuel simulants
Authors: Tarleton, E.S.
Robinson, J.P.
Keywords: Nanofiltration
Membranes
PDMS
Organic solvents
Separation
Solvent resistant membranes
Fuel simulants
Issue Date: 2005
Publisher: American Filtration & Separations Society
Citation: TARLETON, E.S. and ROBINSON, J.P., 2005. Nanofiltration - a method for solute removal from fuel stimulants. American Filtration & Separations Society Diesel and Gas Emission Conference 2005, Ann Arbor, MI, September 19-22.
Abstract: The separation characteristics of a dense polydimethylsiloxane (PDMS) membrane were studied using alkyl and aromatic solvents and low-polarity, sulphur bearing, organometallic (OM) and polynuclear aromatic (PNA) solute compounds. Rejection was found to be dependent on transmembrane pressure, crossflow rate (hydrodynamic conditions), solute size and the degree of swelling induced by the solvent. Rejection increased progressively with pressure whilst a threshold condition was observed above which further increases in crossflow had a negligible influence on rejection. Measurements over the molecular weight range 84-612 g/mol showed the membrane to have a cut-off in the region 350-400 g/mol to all but one of the tested PNA compounds (rubrene). An additional correlation using molecular dimensions instead of molecular weight showed the cutoff size to be in the region of 1-2 nm, with all data falling on a well defined rejection/size curve. Solvent type influenced membrane swelling to an extent dependent on the relative magnitude of the solubility parameters for the solvent and PDMS; similar values led to more swelling, higher fluxes and lower rejections. Results support the concept of viscous solvent flow whilst solute transport could be either predominantly viscous or a combination of viscous and diffusive. With larger molecules a size exclusion mechanism was dominant.
Description: This paper was presented at the Diesel and Gas Emission Conference 2005 (American Filtration & Separation Society: http://www.afssociety.org/)
Version: Not specified
URI: https://dspace.lboro.ac.uk/2134/5744
Appears in Collections:Conference Papers and Presentations (Chemical Engineering)

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