Diffusion of multicomponent vapors in a poly(dimethyl siloxane) membrane

Autor:	Li Ding Wang, Wen Wei Chen, Shao Fan Wang, Su Yu Wu, Shingjiang Jessie Lue, Kuo-Ming Du
Rok vydání:	2008
Předmět:	Ternary numeral system Chemistry Mechanical Engineering General Chemical Engineering Diffusion Dimethyl siloxane Thermodynamics Sorption General Chemistry Thermal diffusivity Membrane Gravimetric analysis General Materials Science Binary system Water Science and Technology
Zdroj:	Desalination. 233:277-285
ISSN:	0011-9164
Popis:	The objective of this study is to establish a mathematical model describing vapor diffusivity as a function of its activity and sorption level in a poly(dimethyl siloxane) (PDMS) membrane for multicomponent feed systems. The gravimetric method was used to determine the vapor diffusion coefficients. At time intervals, the sorbed membranes were heated and purged to analyze the contents of individual vapor components. The data of sorption amount as a function of time elapsed in the transient period were fitted for the diffusion coefficient using Fick’s first law. The Long’s model was used to fit the diffusivity as a function of sorbed vapor content. It was found that the vapor diffusion coefficient in a ternary system was similar to that in a binary system at the same sorption level.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f67109105baa445942540b9553f9293a https://doi.org/10.1016/j.desal.2007.09.052 Zobrazit plný text záznamu Full Text from ScienceDirect