Pervaporation behaviour of chlorinated hydrocarbons through organophilic membranes

✍ Scribed by C. Dotremont; S. Goethaert; C. Vandecasteele

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 628 KB
• Volume: 91
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/0011-9164(93)80056-s

✦ Synopsis

The pervaporation behaviour of chlorinated hydrocarbons (Cl-HC's) was studied in detail. The permeability of different Cl-HC's through a hydrophobic membrane was considered in relation to their molecular structure and some of their physicochemical properties. The hydrocarbons selected for this study differed in: the number and position of chlorine atoms, the chain length, the degree of branching and the presence of a double bond.

The membranes were composite membranes: a dense top layer consisting of PDMS (polydimethylsiloxane), filled with hydrophobic zeolite on a layer consisting of porous PAN (polyacrylonitrile) on polyester fabric. SYMBOLS J;molar flux of component i (mol/m2s) pi -permeability of component i (m2/s) D; -diffusion coefficient of component i (m2/s) S; -solubility coefficient of component i (-) I membrane thickness (m) ci -molar concentration of component i (mol/m3) Pipartial pressure of component i (Pa) ssolution 1,2retentate and permeate side of the membrane respectively