Opportunities for ionic liquids in recovery of biofuels

Fadeev, Andrei G.; Meagher, Michael M.

doi:10.1039/b006102f

Cited by 347 publications

(220 citation statements)

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“…1 Ionic liquids have also been successfully applied in a wide range of applications, for instance in asymmetric synthesis, electrochemical applications, extractive separation in biotechnology, [2][3][4] and also in membrane gas separations 5 and pervaporation. 6 Their successful use is based on their extremely low volatility and consequent stability of the membrane compared to traditional supported liquid membranes.…”

Section: Introductionmentioning

confidence: 99%

High Ionic Liquid Content Polymeric Gel Membranes: Preparation and Performance

et al. 2010

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Ionic liquid polymeric gel membranes containing from 20 wt % to 80 wt % of the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][TFSI]) in poly(vinylidene fluorideco-hexafluoropropylene) (p(VDF-HFP)) were prepared by solvent casting from a solution in acetone. The effect of the ionic liquid on the performance and properties of the membranes was discussed and compared with the neat polymer. In the presence of an excess of ionic liquid, p(VDF-HFP) membranes swell in a significant way, especially above 70°C, becoming completely soluble above 90°C. DSC analysis shows a gradual decrease of the melting point of the gel and a decrease in the overall melting enthalpy with increasing IL content, whereas the melting enthalpy normalized for the polymer fraction shows an initial drop and then a gradual increase. In the presence of the ionic liquid, the elastic modulus and break strength decrease dramatically, while the maximum deformation first increases due to higher flexibility of the plasticized polymer and then rapidly decreases above 40 wt % of IL as a consequence of the progressive decrease of the number of entanglements. X-ray studies demonstrate a reduction in the overall crystal content. The position of the strongest diffraction peak remains unaltered in all samples, suggesting that only the polymer chains crystallize and that no cocrystallization of ionic liquid and polymer takes place. Preliminary gas permeation measurements show a significant increase of the permeability in the presence of [EMIM][TFSI], especially for carbon dioxide. This suggests a potential application in gas separation membranes, for instance for natural gas treatment or for CO 2 sequestration from flue gas.

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Section: Introductionmentioning

confidence: 99%

High Ionic Liquid Content Polymeric Gel Membranes: Preparation and Performance

et al. 2010

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“…Ionic liquids have been described as novel environmentally benign solvents because of their remarkable characteristics, such as non-volatility, high thermal stability, non-flammability and high polarity (Anthony et al, 2001;Fadeev et al, 2001). Numerous applications of these solvents continue to grow at an exponential rate; the most common applications found in the literature are in gas and liquid separation processes Anthony et al, 2001;Fadeev et al, 2001;Visser et al, 2000); as solvents in various reactions systems, such as hydrogenation, hydroformylations, isomerizations, dimerizations, alkylations, among others (Welton, 1999;Hermann et al, 1999;Seddon, 1995;; in electrolytes/fuel cells (Souza et al, 2003); as CO 2 selective separation media (Anthony et al, 2002;Zhang et al, 2006); in the capture or sequestration of…”

Section: Introductionmentioning

confidence: 99%

Modeling vapor liquid equilibrium of ionic liquids + gas binary systems at high pressure with cubic equations of state

Freitas

Cunico

Aznar

et al. 2013

Braz. J. Chem. Eng.

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-Ionic liquids (IL) have been described as novel environmentally benign solvents because of their remarkable characteristics. Numerous applications of these solvents continue to grow at an exponential rate. In this work, high pressure vapor liquid equilibria for 17 different IL + gas binary systems were modeled at different temperatures with Peng-Robinson (PR) and Soave-Redlich-Kwong (SRK) equations of state, combined with the van der Waals mixing rule with two binary interaction parameters (vdW-2). The experimental data were taken from the literature. The optimum binary interaction parameters were estimated by minimization of an objective function based on the average absolute relative deviation of liquid and vapor phases, using the modified Simplex algorithm. The solubilities of all gases studied in this work decrease as the temperature increases and increase with increasing pressure. The correlated results were highly satisfactory, with average absolute relative deviations of 2.10% and 2.25% for PR-vdW-2 and SRK-vdW-2, respectively.

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“…These solvents must be evaporated after extraction, which on one hand increases the energy demand and on the other hand poses a threat to the environment [27]. Domanska and Krolikowski [28] analyzed the extraction of butanol from aqueous solutions using different ionic liquids, namely: 14,6,6,6 ][TCB]).…”

Section: Introductionmentioning

confidence: 99%

Ethanol Recovery from Low-Concentration Aqueous Solutions Using Membrane Contactors with Ionic Liquids

Snochowska

Tylman

Kamiński

2015

Ecological Chemistry and Engineering S

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Recovery of alcohols from diluted aqueous solutions is highly energy-intensive. In order to reduce the costs of concentration of alcohols, membrane processes (including membrane extraction) are used. This paper reports the results of ethanol concentration from diluted aqueous solutions using a hollow fiber membrane contactor with ionic liquid. The studies were performed using a contactor with microporous hollow fiber membranes. The membrane creates a barrier between the feed and extracting solvent, also providing a large mass transfer area. In the process, selected ionic liquid presenting different selectivity towards ethanol was used as extractant. The experiments were performed with feed concentrations of ethanol ranging from 1 to 5 wt.% and various feed flow rates ranging from 1 to 8 dm 3 /h.

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Opportunities for ionic liquids in recovery of biofuels

Cited by 347 publications

References 5 publications

High Ionic Liquid Content Polymeric Gel Membranes: Preparation and Performance

High Ionic Liquid Content Polymeric Gel Membranes: Preparation and Performance

Modeling vapor liquid equilibrium of ionic liquids + gas binary systems at high pressure with cubic equations of state

Ethanol Recovery from Low-Concentration Aqueous Solutions Using Membrane Contactors with Ionic Liquids

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