Vapor permeation of ethyl acetate, propyl acetate, and butyl acetate with hydrophobic inorganic membrane

• Published in: Separation and purification technology Vol. 30; no. 2; pp. 169 - 176
• Main Authors: Song, Kun-Ho, Song, Jee-Hoon, Lee, Kwang-Rae
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.02.2003; Elsevier Science
• Subjects: Applied sciences; Biological and medical sciences; Biotechnology; Butyl acetate; Chemical engineering; Ethyl acetate; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Membrane separation (reverse osmosis, dialysis...); Methods. Procedures. Technologies; Others; Propyl acetate; Separation factor; Surface-modified inorganic membrane; Vapor permeation; Various methods and equipments; Butyl acetate; Separation factor; Ethyl acetate; Surface-modified inorganic membrane; Vapor permeation; Propyl acetate; Water; Porous membrane; Temperature effect; Selectivity; Hydrophobicity; Grafting; Oxide ceramics; Transport process; Membrane separation; Dilute solution; Aroma; Organic compounds; Modified material; Separation capacity; Theoretical study; Organic silane; Experimental study; Surface treatment; Binary mixture; Tubular membrane; Flux density; Concentration effect; Aqueous solution; Performance; Alumina; Inorganic membrane
• ISSN: 1383-5866; 1873-3794
• DOI: 10.1016/S1383-5866(02)00140-5

This study is focused on the permeation characteristics of ester compounds from aqueous solutions through hydrophobic membrane; ethyl acetate (EA), propyl acetate (PA) and butyl acetate (BA). A surface-modified tube-type alumina membrane (Al 2O 3) was used for ester compounds recovery by vapor permeation. Experiments were performed to evaluate the effects of the feed concentration (0.15–0.60 wt.%) and feed temperature (30–50 °C) on the separation of EA, PA, and BA from dilute aqueous solutions. It was found that the permeation flux increased with increasing feed ester concentration and operating temperature. The fluxes of EA, PA, and BA at 0.60 wt.% feed concentration and 40 °C were 282, 526, 661 g/m 2 h, which were much higher than those of polymer membranes. The separation factors for the 0.15–0.60 wt.% feed solution of EA, PA, and BA at 40 °C were in the range of 28.1–93.9, 83.6–129.4, and 190.7–209.9, respectively. The membrane tested showed high flux and high selectivity.