Estimation of Mass Transfer Rates through Hydrophobic Pervaporation Membranes

Autor:	Amy R. Overington, Marie Wong, John A. Harrison, Lilian De Barros Ferreira
Rok vydání:	2009
Předmět:	Mass transfer coefficient Chemistry Process Chemistry and Technology General Chemical Engineering Analytical chemistry Pre-exponential factor Thermodynamics Filtration and Separation Sorption General Chemistry Activation energy Membrane Mass transfer Pervaporation Elastic modulus
Zdroj:	Separation Science and Technology. 44:787-816
ISSN:	1520-5754 0149-6395
DOI:	10.1080/01496390802697106
Popis:	In pervaporation of dilute solutions (acids, esters, and ketones) through hydrophobic membranes, mass transfer coefficients increased with temperature in an Arrhenius-like manner. Activation energies and pre-exponential factors were estimated through empirical correlations, allowing estimation of mass transfer coefficients. The activation energy was a function of the heat of sorption and the elastic modulus of the membrane. For low molecular weight compounds, the heat of sorption was the more important of these two factors, whereas the membrane thickness (which influenced the elastic modulus) became more important for larger compounds. The compensation effect allowed pre-exponential factors to be estimated from the activation energies.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::da5ee282954cf1642578726e57c25996 https://doi.org/10.1080/01496390802697106 Zobrazit plný text záznamu