Semi-Empirical Model of Toluene Transport in Polyethylene Membranes Based on the Data Using a New Type of Apparatus for Determining Gas Permeability, Diffusivity and Solubility

0364388 - ÚCHP 2012 RIV GB eng J - Článek v odborném periodiku
Setničková, Kateřina - Wagner, Zdeněk - Noble, R. - Uchytil, Petr
Semi-Empirical Model of Toluene Transport in Polyethylene Membranes Based on the Data Using a New Type of Apparatus for Determining Gas Permeability, Diffusivity and Solubility.
Chemical Engineering Science. Roč. 66, č. 22 (2011), s. 5566-5574. ISSN 0009-2509. E-ISSN 1873-4405
Grant CEP: GA ČR GA104/09/1165; GA MŠMT ME 889; GA ČR GCP106/10/J038
Výzkumný záměr: CEZ:AV0Z40720504
Klíčová slova: mass transfer * diffusion * membranes
Kód oboru RIV: CB - Analytická chemie, separace
Impakt faktor: 2.431, rok: 2011

Solubility, diffusivity and permeability of toluene vapors in low-density polyethylene (LDPE) membranes of various thicknesses at different temperatures 30, 40 and 50 degrees C in the range of relative vapor pressure were measured using new type of permeation apparatus. Moreover, special construction of the new cell enables determination of the permeant amount sorbed in the membrane in the steady state operation of vapor permeation. The simple semi-empirical model of toluene transport in a polyethylene membrane based on relation between experimentally obtained effective diffusion coefficients and concentration dependent diffusion coefficients evaluated from experiments on a new permeation apparatus was proposed. The model enables estimation of toluene fluxes, sorption in the steady state of vapor permeation and concentration profiles in a polyethylene membrane from equilibrium sorption isotherms and effective diffusion coefficients.
Trvalý link: http://hdl.handle.net/11104/0199883