Kinetics of the exchange of water absorbed in silica hydrogel with ethanol: Modelling by brouers and sotolongo-costa fractal kinetics

Isothermal kinetics of the exchange absorbed water in a silica hydrogel (SH) with ethanol was examined. The isothermal kinetic curves were measured at temperatures: T = 297, 306 and 316 K. rate analysed as function time. possibility mathematical description by Brouers Sotolongo-Costa?s (BS) fractal?s model Parameter values (n, ?, ?) their changes temperature calculated. By applying method Ozao, it determined that limiting step process ethanol. Values fractal dimension SH-ethanol interphase dependences effective time-dependent coefficient, activation energy pre-exponential factor on time degree calculated discussed. proposed mechanism