Matrimid®5218 dense membrane for the separation of azeotropic MeOH-MTBE mixtures by pervaporation

作者：Roberto Castro-Muñoz, F. Galiano, V. Fíla, E. Drioli, A. Figoli · 发表于：Separation and Purification Technology · 年份：2018 · DOI：10.1016/J.SEPPUR.2018.01.045 · 被引用次数：78 · 研究领域：Materials Science

Abstract Matrimid®5218 dense membranes were produced using NMP by solvent evaporation. The membranes have been used, for the first time, in pervaporation (PV) separation of azeotropic methanol (MeOH)- methyl tert- butyl ether (MTBE) mixtures (14.3 and 85.7 wt%, respectively). The membranes were characterized by TGA, SEM, DSC, contact angle and swelling tests. The PV experiments were carried out at different feed temperatures (25–45 °C) and vacuum pressures (0.0538, 0.2400, 2.1000 mbar). Moreover, an analysis of the PV process through the Arrhenius relationship has been provided. The feed temperature (in the range of 25–45 °C) affected mainly the MeOH permeation producing an increasing on its partial permeate flux and separation factor as well. Indeed, the best performances of Matrimid® were found at 45 °C and 0.054 mbar, where a permeate flux and a separation factor of about 0.073 kg m −2  h −1 and 21.16, respectively, were obtained. Finally, the Matrimid PV performance was compared with other polymeric membranes at the azeotropic conditions.