ALI A. A. AL JANABI, OANA CRISTINA PARVULESCU, TANASE DOBRE, VIOLETA ALEXANDRA ION PERVAPORATION OF AQUEOUS ETHANOL SOLUTIONS THROUGH PURE AND COMPOSITE CELLULOSE MEMBRANES
A procedure for synthesis of pure and composite membranes based on cellulose dissolved in NaOH-urea/thiourea solutions was developed. The phase inversion method was employed for cellulose solution conversion to supported and non-supported membranes. The use of tetraethyl orthosilicate (TEOS) as precursor in synthesis of composite cellulose membranes produced significant changes in their structure and pervaporation behaviour. The obtained membranes were tested for the pervaporation of ethanol-water system. Pervaporation performances, which were evaluated in terms of total permeate flux, separation factor and pervaporation separation index, strongly depended on TEOS loading, ethanol concentration and operation temperature.