Liquid transport through sulfonated cation-exchange membranes for different water–alcohol solutions

Godino, M.P.; Barragán, V.M.; Villaluenga, J.P.G.; Izquierdo-Gil, M.A.; Ruı́z-Bauzá, C.; Seoane, B.

doi:10.1016/j.cej.2010.06.013

Cited by 14 publications

(18 citation statements)

References 30 publications

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“…Regarding the uptake of higher alcohols, the information on partition coefficient is absent, but assuming K x % 1 we can infer that the higher the size of the alcohol, the higher the maximum sorption of liquid (and the lower the alcohol content of the solution at the maximum), probably as a consequence of a plasticizing effect of the alcohol that increase the water uptake capacity of Nafion. On the other hand, for the pure or very concentrated alcohols the liquid uptake, measured in terms of λ m , decreases in [287], similar to that observed by Rivin et al [272] for the sorption of the pure alcohols from the vapor phase.…”

Section: Water-alcohol Uptake and Partition Constantsupporting

confidence: 63%

“…The total mass up taken from the ethanol-water mixture is similar to that reported by Song et al [286] for dilute solutions (x < 0.2). Godino et al [287] have studied the liquid uptake of methanol, ethanol, 1-propanol, and 2-propanol aqueous mixtures and up to molar fractions 0.36 for methanol, 0.28 for ethanol, and 0.23 for propanol. The results for methanol and ethanol agree with the previous ones, while in the case of 2-propanol they observed a maximum total uptake at x % 0.15, and for 1-propanol the maximum seems to be close to x ¼ 0.23.…”

Section: Water-alcohol Uptake and Partition Constantmentioning

confidence: 99%

“…The permeability of methanol, ethanol, 1-propanol, and 2-propanol was measured by Godino et al [287] at 25 C as a function of the alcohol concentration through a non-treated Nafion 117. The results, shown in Fig.…”

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confidence: 99%

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Membranes for Direct Alcohol Fuel Cells

Corti

2013

Direct Alcohol Fuel Cells

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This chapter is devoted to summarize and discuss the main properties of ionomeric membranes used in direct alcohol PEM fuel cells. Although Nafion is the proton exchange membrane commonly used in methanol and other direct alcohol fuel cells, other proton and alkaline membranes are being investigated in order to improve the efficiency of DAFC. The goals in the development of this critical component of DAFC are: low cost, long durability, low alcohol permeability and high electrical conductivity. The last two properties can be combined in a single parameter, the membrane selectivity that accounts for the ratio between the proton and alcohol transport through the membrane. This parameter can be compared to that measured for Nafion to define a relative selectivity, which is a primary parameter to evaluate the potentiality of a ionomer material to be used in alcohol feed fuel cells.The vast catalogue of polymeric materials reviewed here included Nafion composite with inorganic and organic fillers, and non-fluorinated proton conducting membranes such as sulfonated polyimides, poly(arylene ether)s, polysulfones, poly (vinyl alcohol), polystyrenes, and acid-doped polybenzimidazoles. Anionexchange membranes are also discussed because of the facile electro-oxidation of alcohols in alkaline media and because of the minimization of alcohol crossover in alkaline direct alcohol fuel cells.The performance of different types of membranes in direct alcohol fuel cells, mainly methanol, are summarized and discussed in order to identify the most promissory ones. The lack of correlation between the relative selectivity and fuel cell performance of the membranes indicates that the architecture of the three

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Section: Water-alcohol Uptake and Partition Constantsupporting

confidence: 63%

Section: Water-alcohol Uptake and Partition Constantmentioning

confidence: 99%

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Membranes for Direct Alcohol Fuel Cells

Corti

2013

Direct Alcohol Fuel Cells

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“…This effect results in decreasing the electric conductivity observed for Nafion (in spite of higher swelling) and other cation-exchange membranes in water-methanol solutions [18,21,[25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 88%

“…In this study we have used the same experimental procedure as previously [25,42]. The water and methanol uptake was determined by Raman spectrometry [43,44] (LABRAM-ISA-DILOR).…”

Section: Methanol Concentration In the Membranementioning

confidence: 99%

Swelling and permeability of Nafion®117 in water–methanol solutions: An experimental and modelling investigation

Chaabane

Dammak

Grande

et al. 2011

Journal of Membrane Science

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Quantification of Organic Solvent Concentration Profiles in Ion Exchange Membranes Via Confocal Raman Microscopy

Götz,

Komma,

Dworschak

et al. 2023

Adv Materials Inter

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The perfluorinated sulfonic acid membranes used in direct alcohol fuel cells cause low faradaic efficiency and performance due to alcohol absorption and permeation. Thus, a measurement setup is sought that enables a direct evaluation of the suitability of polymer electrolytes for this application. A 3D‐printed diffusion cell setup capable of measuring the interaction between the organic solvents, such as alcohols, and a proton exchange membrane via confocal Raman microscopy is introduced. The cell design employs flow channels to mimic the flow fields of electrochemical cell tests. Exemplarily, information on the interaction of membranes like Nafion 212 and the composite membrane Nafion XL with 1 m solutions of organic solvents such as 2‐propanol, acetone, and ethanol are provided to demonstrate the applicability of this setup. The Raman diffusion cell is capable of quantifying the preferred solvent uptake, which is characterized by the sorption coefficient, the permeability, and the concentration gradient within the membrane. These properties can be obtained in situ and in a time‐resolved manner. Thus, this diffusion cell setup is a powerful and accessible tool for screening membrane compatibility with various liquids.

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Liquid transport through sulfonated cation-exchange membranes for different water–alcohol solutions

Cited by 14 publications

References 30 publications

Membranes for Direct Alcohol Fuel Cells

Membranes for Direct Alcohol Fuel Cells

Swelling and permeability of Nafion®117 in water–methanol solutions: An experimental and modelling investigation

Quantification of Organic Solvent Concentration Profiles in Ion Exchange Membranes Via Confocal Raman Microscopy

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