Chemical and Biomolecular Engineering - Research Publications
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ItemOrganic solvent nanofiltration of binary vegetable oil/terpene mixtures: Experiments and modelling(ELSEVIER, 2019-03-01)Bio-derived solvents such as ρ-cymene, d-limonene and α-pinene represent feasible alternatives to n-11 hexane for the extraction of vegetable oils. However, the large-scale utilization of these solvents is 12 still limited mainly owing to their high boiling points and latent heats of vaporization. In this work, the 13 performance of composite polydimethylsiloxane/polyacrylonitrile (PDMS/PAN) organic solvent 14 nanofiltration membranes in the recovery of these solvents from their binary mixtures with canola oil 15 is investigated. The sorption isotherms of the mixtures were first studied using free-standing PDMS 16 films and the multicomponent Flory-Huggins model used to determine the resulting interaction 17 parameters. The partial solvent uptake decreased with increasing oil concentration in the mixture. On 18 the other hand, the partial oil uptake in the solvent mixture was higher than that of the pure oil which 19 was attributed to the swelling effects induced by solvents. The effects of feed concentration (10-30 20 wt. % oil), feed temperature (25-40 °C), transmembrane pressure (5-30 bar), and cross-flow velocity 21 (18-52 cm s-1) on the membrane performance were then studied in a cross-flow membrane setup. 22 Maxwell-Stefan formulations were combined with the ternary Flory-Huggins solubility model to 23 successfully describe these flux data.
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ItemTransport of terpenes through composite PDMS/PAN solvent resistant nanofiltration membranes(ELSEVIER SCIENCE BV, 2018-12-22)
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