Fabrication and characterization of superhydrophobic PDMS composite membranes for efficient ethanol recovery via pervaporation

He, Xinping; Wang, Tao; Huang, Jinghui; Chen, Jinxun; Li, Jiding

doi:10.1016/j.seppur.2020.116675

Cited by 70 publications

(34 citation statements)

References 57 publications

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“…Although it is known that PDMS is benchmark material in the preparation of ethanol perm-selective membranes, pure PDMS membranes show low fluxes and little ethanol selectivity. However, by modifying the composition of the PDMS membrane (mixed-matrix membranes (MMMs) or hybrid membranes) it is possible to improve the ethanol separation efficiency, increasing both permeability and selectivity [ 59 , 62 , 63 , 64 ].…”

Section: Resultsmentioning

confidence: 99%

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Separation and Semi-Empiric Modeling of Ethanol–Water Solutions by Pervaporation Using PDMS Membrane

et al. 2020

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High energy demand, competitive fuel prices and the need for environmentally friendly processes have led to the constant development of the alcohol industry. Pervaporation is seen as a separation process, with low energy consumption, which has a high potential for application in the fermentation and dehydration of ethanol. This work presents the experimental ethanol recovery by pervaporation and the semi-empirical model of partial fluxes. Total permeate fluxes between 15.6–68.6 mol m−2 h−1 (289–1565 g m−2 h−1), separation factor between 3.4–6.4 and ethanol molar fraction between 16–171 mM (4–35 wt%) were obtained using ethanol feed concentrations between 4–37 mM (1–9 wt%), temperature between 34–50 ∘C and commercial polydimethylsiloxane (PDMS) membrane. From the experimental data a semi-empirical model describing the behavior of partial-permeate fluxes was developed considering the effect of both the temperature and the composition of the feed, and the behavior of the apparent activation energy. Therefore, the model obtained shows a modified Arrhenius-type behavior that calculates with high precision the partial-permeate fluxes. Furthermore, the versatility of the model was demonstrated in process such as ethanol recovery and both ethanol and butanol dehydration.

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Section: Resultsmentioning

confidence: 99%

“…As it can be seen, for all the ethanol concentrations studied (1–9 wt%), the ethanol and water fluxes increased exponentially with increasing of feed temperature, which is considered to be Arrhenius behavior, Equation ( 9 ), [ 63 ].

…”

Section: Resultsmentioning

confidence: 99%

Separation and Semi-Empiric Modeling of Ethanol–Water Solutions by Pervaporation Using PDMS Membrane

et al. 2020

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“…Solution casting is the most commonly used method for the synthesis of the flat membrane. For example, He et al [ 12 ] prepared two kinds of lotus polydimethylsiloxane (PDMS) composite membranes by solution casting method, namely lotus leaf powder/PDMS mixed matrix membranes (MMMs) and polydivinylbenzene coated PDMS composite membranes. The preparation process of the above PDMS composite membranes is illustrated in Figure 1 .…”

Section: Synthesis Types and Properties Of Polymeric Pv Membranesmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Fabrication, Properties, Performances, and Separation Application of Polymeric Pervaporation Membranes: A Review

Wang

et al. 2020

Polymers

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Membrane separation technologies have attracted great attentions in chemical engineering, food science, analytical science, and environmental science. Compared to traditional membrane separation techniques like reverse osmosis (RO), ultrafiltration (UF), electrodialysis (ED) and others, pervaporation (PV)-based membrane separation shows not only mutual advantages such as small floor area, simplicity, and flexibility, but also unique characteristics including low cost as well as high energy and separation efficiency. Recently, different polymer, ceramic and composite membranes have shown promising separation applications through the PV-based techniques. To show the importance of PV for membrane separation applications, we present recent advances in the fabrication, properties and performances of polymeric membranes for PV separation of various chemicals in petrochemical, desalination, medicine, food, environmental protection, and other industrial fields. To promote the easy understanding of readers, the preparation methods and the PV separation mechanisms of various polymer membranes are introduced and discussed in detail. This work will be helpful for developing novel functional polymer-based membranes and facile techniques to promote the applications of PV techniques in different fields.

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“…To improve the separation performance of membranes, it has been suggested that different organic or inorganic materials, such as fluorescent material (TPE) [ 8 ], metal nanoparticles [ 9 ], graphene oxide (GO) [ 10 ], carbon nanotubes (CNTs) [ 11 ], metal–organic frameworks (MOFs) [ 12 ], TiO 2 [ 13 , 14 ] and silica [ 15 , 16 ] are incorporated. Compared with other materials, silica is a common and low-cost functional filler for organic–inorganic hybrid membranes.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Green Synthesis Process on Asymmetric Hybrid PDMS Membrane for Efficient CO2/N2 Separation

Zhuang

Wey

et al. 2021

Membranes

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The effects of green processes in hybrid polydimethylsiloxane (PDMS) membranes on CO2 separation have received little attention to date. The effective CO2 separation of the membranes is believed to be controlled by the reaction and curing process. In this study, hybrid PDMS membranes were fabricated on ceramic substrates using the water-in-emulsion method and evaluated for their gas transport properties. The effects of the tetraethylorthosilicate (TEOS) concentration and curing temperature on the morphology and CO2 separation performance were investigated. The viscosity measurement showed that, at specific reaction times, it is benefit beneficial to fabricate the symmetric hybrid PDMS membranes with a uniform and dense selective layer on the substrate. Moreover, the a high TEOS concentration can decrease the reaction time and obtain create the a fully crosslinked structure, allowing more efficient CO2/N2 separation. The separation performance was furtherly improved with in the membrane prepared at a high curing temperature of 120 °C. The developed membrane shows excellent CO2/N2 separation with a CO2 permeance of 27.7 ± 1.3 GPU and a CO2/N2 selectivity of 10.3 ± 0.3. Moreover, the membrane shows a stable gas separation performance of up to 5 bar of pressure.

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Fabrication and characterization of superhydrophobic PDMS composite membranes for efficient ethanol recovery via pervaporation

Cited by 70 publications

References 57 publications

Separation and Semi-Empiric Modeling of Ethanol–Water Solutions by Pervaporation Using PDMS Membrane

Separation and Semi-Empiric Modeling of Ethanol–Water Solutions by Pervaporation Using PDMS Membrane

Fabrication, Properties, Performances, and Separation Application of Polymeric Pervaporation Membranes: A Review

Impacts of Green Synthesis Process on Asymmetric Hybrid PDMS Membrane for Efficient CO2/N2 Separation

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