Enhanced Pervaporative Separation of Thiophene/n-Heptane Using Metal Loaded PEBAX/PAN Membranes

摘要

The mass transfer of thiophene through pervaporation(PV)membranes could be facilitated by certain transitional metal ions like Ag^+,Mn^2+,and Cr^3+thanks to their p complexation with thiophene.In this study,Ag^+,Mn^2+,and Cr^3+ions were loaded onto the polyether block amide(PEBAX)/PAN composite membranes and were tested on the performance for separation of thiophene/n-heptane mixture.Pervaporation test results showed that the pervaporative separation index increased significantly to 73.1%,75.5%,and 97.2%at 30℃for the Ag^+-,Mn2^+-,Cr3^+-loaded PEBAX membranes,respectively,as compared to the pristine PEBAX/PAN composite membrane.