NOTE: PIVsuite is now available in v. 0.83; this new version is NOT uploaded to ResearchGate. Ple... more NOTE: PIVsuite is now available in v. 0.83; this new version is NOT uploaded to ResearchGate. Please, download it from the external link (or just google it...). Additional feature of this version is: - supports processing of the same data set using multiple Matlab instances, allowing faster treatment by employing multiple processors or computers. ------------------------------------ PIVsuite is a MATLAB package for measurements of the velocity field (or particle displacement) using PIV technique. It has following features: (1) used from command line (no GUI); suitable for implementation in MATLAB software with broader scope; (2) relatively fast, especially if previous velocity field can be used as velocity guess for the next image pair (increasing evaluation speed in the case of time-resolved PIV); (3) multipass, multigrid algorithm, with image deformation; (4) multipass validation of velocity vectors; (5) each image might have its individual mask (suitable for studying flow around ...
Chemical Engineering and Processing: Process Intensification, 2015
ABSTRACT This study reports on the sorption and permeation of ethanol vapors in the ionic liquid ... more ABSTRACT This study reports on the sorption and permeation of ethanol vapors in the ionic liquid polymer gel membrane. The gel membrane was based on poly(vinylidene fluoride-co-hexafluoropropylene), which contained 80 wt.% of the imidazolium-based ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide. Ethanol sorption in ionic liquid membrane was compared with that in the neat polymer. Further, from experimental data followed that the diffusion coefficient of ethanol was 3 orders of magnitude higher in ionic liquid membrane in comparison with neat polymer membrane. Interestingly, ethanol permeability was found immeasurably low in neat polymer membrane while ethanol permeability reached approximately 25,000 Barrer in the ionic liquid membrane at the highest ethanol vapor activity. The values of the activation energy of diffusion and permeation were determined from the temperature dependences of the sorption and permeation experimental data.
ABSTRACT The emissions of hydrocarbons from fossil fuels into atmosphere entail both an economic ... more ABSTRACT 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/N2 separations.
NOTE: PIVsuite is now available in v. 0.83; this new version is NOT uploaded to ResearchGate. Ple... more NOTE: PIVsuite is now available in v. 0.83; this new version is NOT uploaded to ResearchGate. Please, download it from the external link (or just google it...). Additional feature of this version is: - supports processing of the same data set using multiple Matlab instances, allowing faster treatment by employing multiple processors or computers. ------------------------------------ PIVsuite is a MATLAB package for measurements of the velocity field (or particle displacement) using PIV technique. It has following features: (1) used from command line (no GUI); suitable for implementation in MATLAB software with broader scope; (2) relatively fast, especially if previous velocity field can be used as velocity guess for the next image pair (increasing evaluation speed in the case of time-resolved PIV); (3) multipass, multigrid algorithm, with image deformation; (4) multipass validation of velocity vectors; (5) each image might have its individual mask (suitable for studying flow around ...
Chemical Engineering and Processing: Process Intensification, 2015
ABSTRACT This study reports on the sorption and permeation of ethanol vapors in the ionic liquid ... more ABSTRACT This study reports on the sorption and permeation of ethanol vapors in the ionic liquid polymer gel membrane. The gel membrane was based on poly(vinylidene fluoride-co-hexafluoropropylene), which contained 80 wt.% of the imidazolium-based ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide. Ethanol sorption in ionic liquid membrane was compared with that in the neat polymer. Further, from experimental data followed that the diffusion coefficient of ethanol was 3 orders of magnitude higher in ionic liquid membrane in comparison with neat polymer membrane. Interestingly, ethanol permeability was found immeasurably low in neat polymer membrane while ethanol permeability reached approximately 25,000 Barrer in the ionic liquid membrane at the highest ethanol vapor activity. The values of the activation energy of diffusion and permeation were determined from the temperature dependences of the sorption and permeation experimental data.
ABSTRACT The emissions of hydrocarbons from fossil fuels into atmosphere entail both an economic ... more ABSTRACT 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/N2 separations.
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