A compositional model based on SAFT-VR and Maxwell-Stefan equations for pervaporative separation of aroma compounds from aqueous solutions

作者: Marzieh Aghakarimiha , Ahmadreza Raisi , Gholamreza Pazuki

DOI: 10.1016/J.MOLLIQ.2017.11.165

关键词: Isoamyl acetatePervaporationThermodynamicsEquation of stateDiffusionMass transferAromaSorptionAqueous solutionMaterials sciencePhysical and Theoretical ChemistrySpectroscopyMaterials ChemistryAtomic and Molecular Physics, and OpticsElectronic, Optical and Magnetic MaterialsCondensed matter physics

摘要: Abstract In this study, the SAFT-VR equation of state combined with Maxwell-Stefan theory was employed to develop a mass transfer model for pervaporation process. For purpose, used thermodynamic modeling sorption step as one main steps in process and applied describe transport permeating compounds through membrane. The diffusion coefficients were estimated based on free volume theory. then validated using experimental data obtained from pervaporative separation volatile aroma like 3-methyl butanal, isoamyl acetate n-hexanol their binary aqueous solutions polydimethylsiloxane (PDMS) proposed successfully able predict influence feed concentration operating temperature water partial fluxes factors. predicted total showed good agreement measured at various concentrations temperatures. Therefore, equations satisfactorily described hydrophobic without need any adjustable parameters dependent experiments.

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