Organic solvent nanofiltration of binary vegetable oil/terpene mixtures: Experiments and modelling

Abdellah, Mohamed H.; Liu, L.; Scholes, Colin A.; Freeman, Benny D.; Kentish, Sandra E.

doi:10.1016/j.memsci.2018.12.026

Cited by 24 publications

(13 citation statements)

References 77 publications

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“…As expected, the solvent flux increased linearly with the transmembrane pressure. For all membrane types, hexane showed the highest flux followed by cymene, limonene and pinene which is the same order of increasing solvent viscosity (Abdellah et al, 2019(Abdellah et al, , 2018. The pure solvent flux increased with increasing the temperature as shown in Figure 7 which is explained by the decrease in solvent viscosity.…”

Section: Flux Resultsmentioning

confidence: 79%

“…Filtration experiments of crude oil/solvent mixtures were carried out in a cross-flow membrane arrangement as reported in our earlier work (Abdellah et al, 2019(Abdellah et al, , 2018. A Sterlitech-CF042 membrane cell was used for the polymeric membranes with a PTFE high foulant (65 mils, Sterlitech) feed side spacer placed on the feed side to minimise concentration polarisation.…”

Section: Filtration Experimentsmentioning

confidence: 99%

“…In our recent work, we investigated the performance of composite PDMS/PAN solvent resistant nanofiltration membranes for the recovery of these solvents from their binary mixture with canola oil (Abdellah, Liu, Scholes, Freeman, & Kentish, 2019;Abdellah et al, 2018). We concluded that organic solvent nanofiltration was a promising alternative to evaporation to recover these solvents from their oil mixtures.…”

Section: Introductionmentioning

confidence: 99%

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Efficient degumming of crude canola oil using ultrafiltration membranes and bio-derived solvents

Abdellah

Scholes

Liu

et al. 2020

Innovative Food Science & Emerging Technologies

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Vegetable oils derived from rapeseed and its genetic variant canola, are conventionally extracted from oilseeds by means of an organic solvent, typically hexane. Concerns regarding the toxicity of hexane have meant safer and more environmentally friendly solvents such as terpenes are becoming attractive. In this research, the degumming of canola oil/terpene mixtures using ultrafiltration is considered as a critical step in such an extraction process. Polysulfone (PSF) and polyethersulfone (PES) membranes were found to be ineffective in this application, as the oil appeared to cause swelling of the membrane structure. This meant that the original flux could not be restored after cleaning. Conversely, a ceramic membrane (MWCO 5 kDa) provided stable behaviour over several cycles of operation when cleaned with pure solvent at high cross velocity at 40 °C. This membrane showed high phospholipid retention (95±2 %), although some oil was also retained (16±3%). Cymene emerged as the most attractive of the three terpenes tested, with higher permeate flux and phospholipid rejection than limonene or pinene. Industrial Relevance: While hexane has been traditionally used for oilseed extraction, toxicity concerns are likely to restrict its industrial use in the future. This article provides information to engineers and food scientists on the use of terpenes as an alternative solvent. In particular, the potential for ultrafiltration to be used in degumming of canola oil/terpene mixture is assessed. Our research shows that polymeric membranes are unlikely to be useful at scale in this application, as they are not readily cleaned for reuse. Conversely, a ceramic membrane of 5 kDa pore size provides the necessary rejection of phospholipids. There is some oil retention, that might require a downstream recovery step. The best results were obtained with cymene, suggesting this is a good target for industrial use.

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Section: Flux Resultsmentioning

confidence: 79%

Section: Filtration Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Efficient degumming of crude canola oil using ultrafiltration membranes and bio-derived solvents

Abdellah

Scholes

Liu

et al. 2020

Innovative Food Science & Emerging Technologies

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“…Abdellah et al applied NF for the recovery of bio-derived solvents from binary mixtures with canola oil [126]. They used Maxwell-Stefan formulations together with Flory-Huggins solubility model to describe the flux data as a function of concentration, feed temperature, transmembrane pressure, and cross-flow velocity (Figure 27).…”

Section: Mathematical Modelling In Nanofiltrationmentioning

confidence: 99%

“…Flux of pinene and oil through PDMS/PAN membrane from 10 wt. % oil mixtures; symbols represent experimental data; lines are simulation results[126] …”

mentioning

confidence: 99%

Mathematical and optimization modelling in desalination: State-of-the-art and future direction

et al. 2019

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The growing water demand across the world necessitates the need for new and improved processes as well as for a better understanding of existing processes. This level of understanding includes predicting system performance in scenarios that cannot always be evaluated experimentally. Mathematical modelling is a crucial component of designing new and improved engineering processes. Through mathematically modelling real life systems, we gain a deeper understanding of processes while being able to predict performance more effectively. Advances in computational capacity and the ease of assessing systems allow researchers to study the feasibility of various systems. Mathematical modelling studies enable optimization performance parameters while minimizing energy requirements and, as such, have been an active area of research in desalination. In this review, the most recent developments in mathematical and optimization modelling in desalination are discussed with respect to transport phenomena, energy consumption, fouling predictions, and the integration of multiple scaling evolution on heat transfer surfaces has been reviewed. Similarly, developments in optimization of novel reverse osmosis (RO) configurations have been analyzed from an energy consumption perspective. Transport models for membranebased desalination processes, including relatively less understood processes such as nanofiltration and forward osmosis are presented, with recent modifications to allow for different solutes and solutions. Mathematical modelling of hybrid systems integrated with RO has also been reviewed. A survey of the literature shows that mathematical and optimization modelling of desalination processes is an exciting area for researchers in which future scholarship includes coupling of renewable energy systems with desalination technologies, as well as more advanced descriptions of fouling evolution other than that of cake filtration in membrane-based processes.

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