TITLE:
Concentration of Bio-Ethanol through Cellulose Ester Membranes during Temperature-Difference Controlled Evapomeation
AUTHORS:
Tadashi Uragami
KEYWORDS:
Bio-Ethanol, Concentration, Membrane, Cellulose Ester, Temperature-Difference Controlled Evapomeation
JOURNAL NAME:
Materials Sciences and Applications,
Vol.2 No.10,
October
18,
2011
ABSTRACT: To evaluate the high-performance of membrane materials in the concentration of an aqueous solution of dilute bioethanol under temperature-difference controlled evapomeation (TDEV), asymmetric porous cellulose nitrate (CN) and cellulose acetate (CA) membranes were prepared by a phase inversion method. In the concentration of dilute ethanol under TDEV, these membranes showed a high permeation rate and high ethanol/water selectivity. In membranes with almost the similar pore size, the ethanol/water selectivity was considerably higher for the CN membrane than the corresponding CA membrane. This result suggested that the affinity between the membrane material and the permeant is an important factor in the separation selectivity.