- Chemical and Biomolecular Engineering - Research Publications
Chemical and Biomolecular Engineering - Research Publications
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ItemOrganic solvent nanofiltration of binary vegetable oil/terpene mixtures: Experiments and modellingAbdellah, MH ; Liu, L ; Scholes, CA ; Freeman, BD ; Kentish, SE (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 membranesAbdellah, MH ; Scholes, CA ; Freeman, BD ; Liu, L ; Kentish, SE (ELSEVIER SCIENCE BV, 2018-12-22)
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ItemThe impact of toluene and xylene on the performance of cellulose triacetate membranes for natural gas sweeteningLu, HT ; Liu, L ; Kanehashi, S ; Scholes, CA ; Kentish, SE (ELSEVIER, 2018-06-01)
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ItemThe impact of ethylene glycol and hydrogen sulphide on the performance of cellulose triacetate membranes in natural gas sweeteningLu, HT ; Kanehashi, S ; Scholes, CA ; Kentish, SE (ELSEVIER, 2017-10-01)
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ItemCO2 capture from pre-combustion processes-Strategies for membrane gas separationScholes, CA ; Smith, KH ; Kentish, SE ; Stevens, GW (ELSEVIER SCI LTD, 2010-09)
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ItemEnhancing gas permeability in mixed matrix membranes through tuning the nanoparticle propertiesKanehashi, S ; Chen, GQ ; Scholes, CA ; Ozcelik, B ; Hua, C ; Ciddor, L ; Southon, PD ; D'Alessandro, DM ; Kentish, SE (ELSEVIER SCIENCE BV, 2015-05-15)
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ItemThe potential for use of cellulose triacetate membranes in post combustion captureLu, HT ; Kanehashi, S ; Scholes, CA ; Kentish, SE (ELSEVIER SCI LTD, 2016-12)
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ItemThe effect of temperature on the permeation properties of Sulphonated Poly (Ether Ether) Ketone in wet flue gas streamsAzher, H ; Scholes, C ; Kanehashi, S ; Stevens, G ; Kentish, S (ELSEVIER, 2016-12-01)
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ItemCrosslinked PEG and PEBAX Membranes for Concurrent Permeation of Water and Carbon DioxideScholes, CA ; Chen, GQ ; Lu, HT ; Kentish, SE (MDPI, 2016-03)Membrane technology can be used for both post combustion carbon dioxide capture and acidic gas sweetening and dehydration of natural gas. These processes are especially suited for polymeric membranes with polyether functionality, because of the high affinity of this species for both H₂O and CO₂. Here, both crosslinked polyethylene glycol diacrylate and a polyether-polyamide block copolymer (PEBAX 2533(©)) are studied for their ability to separate CO₂ from CH₄ and N₂ under single and mixed gas conditions, for both dry and wet feeds, as well as when 500 ppm H₂S is present. The solubility of gases within these polymers is shown to be better correlated with the Lennard Jones well depth than with critical temperature. Under dry mixed gas conditions, CO₂ permeability is reduced compared to the single gas measurement because of competitive sorption from CH₄ or N₂. However, selectivity for CO₂ is retained in both polymers. The presence of water in the feed is observed to swell the PEG membrane resulting in a significant increase in CO₂ permeability relative to the dry gas scenario. Importantly, the selectivity is again retained under wet feed gas conditions. The presence of H₂S is observed to only slightly reduce CO₂ permeability through both membranes.
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ItemCompetitive Permeation of Gas and Water Vapour in High Free Volume Polymeric MembranesScholes, CA ; Jin, J ; Stevens, GW ; Kentish, SE (WILEY, 2015-05-15)