Pervaporation separation of MeOH/MTBE mixtures with modified PEEK membrane: Effect of operating conditions

► PEEKWC is able to separate MeOH from MTBE particularly at low concentrations. ► The swelling degree increased at high MeOH concentrations. ► Increasing the feed flow rate has a positive effect on both flux and selectivity. ► Increasing the temperature has a positive effect on flux contrary to selectivity. ► The membrane's strength decreased at high MeOH percents contrary to their strain.