Ethanol separation using Sepabeads207 adsorbent

This work was aimed at evaluating the ethanol separation using sepabeads207 adsorbent. a 10 wt% of ethanol solution was used as a model fermentation broth. the separation of ethanol from the solution was performed in a tube containing sepabeads207 at different operating conditions: temperatures,20 to 40°c; solution ph,4 to 7; and contact times,5 to 25 minutes. recovery of ethanol via stripping was studied between 15 and 35 minutes,and at different air temperatures of 80 to 95°c. the concentration of liquid ethanol was measured using gas chromatography and refractometer. a higher ethanol concentration by sepabeads207 adsorption was obtained at 20°c and solution ph 4 for 5 minutes,while the recovery was performed better at 80°c for 15 minutes. by applying these conditions,10 wt% of ethanol in the solution was concentrated to 46 wt%. the ethanol adsorption data are: i). capacity of 0.22 g ethanol/g adsorbent,ii). selectivity of 7.75 (g ethanol/g water (adsorbed)) / (g ethanol/g water (original solution)),and iii). efficiency of 100%. sepabeads207 is a promising adsorbent for ethanol separation from the dilute ethanol solution. © 2017 penerbit utm press. all rights reserved.