Abstract:

In order to be better guide potato powder used for ethanol dehydration, water adsorption isotherms on potato powder should be determined, and a sorption isotherm model should be developed. Adsorption equilibrium models have been used to fit the experimental data for water adsorption isotherms on potato powder. Results from the adsorption equilibrium experiments indicated that, isotherm of potato powder exhibited Type Ⅱ (according to the Brunauer’s classification). The sorption capacity decreased with increasing temperature. GAB model was found to be the best represent experimental data.