Measuring the transient diffusion of vapor mixtures through dense membranes

Vopička, Ondřej; Hynek, Vladimı́r; Rabová, Veronika

doi:10.1016/j.memsci.2009.12.031

Cited by 13 publications

(6 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The clustering phenomena implicates that at low penetrant concentration the equilibrium between species is shifted towards the single molecules and that at high concentration the equilibrium is shifted towards the aggregated state. This means that the transport could also be described in terms of concentration dependent diffusion, similar to the work of Vopička et al [50][51][52], or it would require a more rigorous approach based on multi-component diffusion. This will be subject of further studies.…”

Section: Discussionmentioning

confidence: 99%

Organic vapour transport in glassy perfluoropolymer membranes: A simple semi-quantitative approach to analyze clustering phenomena by time lag measurements

Jansen

Friess

Drioli

2011

Journal of Membrane Science

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Organic vapour transport in glassy perfluoropolymer membranes: A simple semi-quantitative approach to analyze clustering phenomena by time lag measurements

Jansen

Friess

Drioli

2011

Journal of Membrane Science

View full text Add to dashboard Cite

“…Permeation equipment is generally available to examine gas transport and water transmission, but instruments accessible to study solvent migration are relatively rare. 5,6 Nonetheless, transmission rates of solvents and moisture through polymer films continue to be key performance indicators for various applications including packaging, encapsulation, and membrane separations. In addition, commercial units marketed to measure the transmission rates of penetrants through polymers are generally developed to examine steady state transmission rates and permeation coefficients.…”

Section: Introductionmentioning

confidence: 99%

Payne cell gravimetric measurements in polymer‐solvent systems for diffusion coefficients and isotherm data

Zielinski

Altınkaya

Garcia³

2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

The discussion focuses on the application of a Payne cell to the measurement of diffusion and solubility coefficients in polymer/solvent systems. Payne cells have, thus far, been used exclusively to measure steady-state permeation rates of solvents. An analytical model has been developed to describe transient gravimetric sorption and desorption measurements performed with a Payne cell. The model has been validated by a complementary numerical simulation and has been applied to evaluate diffusion and solubility coefficients in two different toluene-silicone rubber systems. The data measured using the Payne cell are found to compare very well with diffusion coefficient and isotherm data measured by traditional gravimetric sorption experiments.

show abstract

“…Vapour permeation studies are often accompanied by sorption experiments (Vopička et al, 2010a;Friess et al, 2009), which can be used for modelling and characterisation of the diffusion processes (Vopička et al, 2013(Vopička et al, , 2010b.…”

Section: Introductionmentioning

confidence: 99%

Vapour permeation and sorption in fluoropolymer gel membrane based on ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulphonyl)imide

et al. 2014

Self Cite

View full text Add to dashboard Cite

The emissions of hydrocarbons from fossil fuels into atmosphere entail both an economic loss and an environmental pollution. Membrane separations can be used for vapour recovery and/or vapour removal from the permanent gas stream, given that the appropriate membrane is identified. A neat poly(vinylidene fluoride-co-hexafluoropropylene) membrane is impermeable to both the representatives of aliphatic hydrocarbons and branched hydrocarbons, namely hexane and isooctane, whereas the permeation flux is enhanced by the presence of 80 mass % of the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulphonyl)imide in the membrane, as detailed in this work. The permeabilities of hydrocarbon vapours were determined from the binary mixture containing hydrocarbon and nitrogen to simulate the real input of an air stream containing a condensable hydrocarbon. The diffusion coefficient determined from sorption measurements was higher for hexane, as would be expected for a smaller molecule, whereas both the sorption isotherms and permeabilities of the hydrocarbons studied were found to be almost identical. It is possible that the sorption effect predominates in the transport mechanism for VOCs/N 2 separations.

show abstract

Measuring the transient diffusion of vapor mixtures through dense membranes

Cited by 13 publications

References 23 publications

Organic vapour transport in glassy perfluoropolymer membranes: A simple semi-quantitative approach to analyze clustering phenomena by time lag measurements

Organic vapour transport in glassy perfluoropolymer membranes: A simple semi-quantitative approach to analyze clustering phenomena by time lag measurements

Payne cell gravimetric measurements in polymer‐solvent systems for diffusion coefficients and isotherm data

Vapour permeation and sorption in fluoropolymer gel membrane based on ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulphonyl)imide

Contact Info

Product

Resources

About