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A novel vapor permeation-stepwise injection (VP-SWI) method for the determination of methanol and ethanol in biodiesel samples is discussed. In the current study, stepwise injection analysis was successfully combined with voltammetric detection and vapor permeation. This method is based on the separation of methanol and ethanol from a sample using a vapor permeation module (VPM) with a selective polymer...
In present work the nonequilibrium thermodynamic advantages for pervaporation process approximation are discussed. The calculation model, which aligns nonequilibrium thermodynamic, pervaporation data and vapor–liquid equilibrium data, is presented. The approximation of vapor–liquid equilibrium data for feed mixtures was performed by Wilson and NRTL equations. Approbation of proposed approach with...
This paper continues research on the physicochemical features of nanocomposites of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) and fullerene C 60 with the purpose of using them as a selective layer of composite membranes in pervaporation coupling esterification of acetic acid with ethanol to produce ethyl acetate. The C 60 –PPO/MFFC composite membranes containing up to 3wt%C 60...
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