Table shows the component activity coefficients for the investigated system based on feed and permeate compositions, which were estimated assuming that the components of the mixed solvent (95% methanol, 5% water) permeate the membrane equally, such that they are present at a constant ratio. Activity coefficients were calculated using the Aspen Plus property estimation tool. The obtained activity coefficient values show that the mixed-solvent forms a non-ideal solution with a positive deviation from ideality (𝛾 > 1). There is a notable difference in the magnitude of the component activity coefficients on the feed and permeate side.