Akademik Veri Yönetim Sistemi
Chinese Journal of Chemical Engineering, cilt.27, sa.2, ss.314-321, 2019 (SCI-Expanded)
© 2018 Elsevier B.V. Fe 3 O 4 -PVDF membranes were prepared by blending of magnetic Fe 3 O 4 powders with polyvinylidene fluoride to investigate whether those were usable or not in catalytic membrane reactors. Filtration performances and catalytic activity of membranes in microwave conditions were measured in separate processes. Composite Fe 3 O 4 -PVDF membranes were characterized by TG-DTA, FTIR, XRD, SEM and contact angle techniques. Disappearing of α-phases at PVDF was observed with increasing amount of additives from XRD diffraction patterns. Decomposition of polymer fastened due to catalytic effect of Fe 3 O 4 . Finger-like structures and large number of small pores were observed at the SEM images. Those provided effective transportation of substrate among the active sites of catalyst. At the experiments conducted in batch reactor, 51%, 77%, 66% and 63% benzyl alcohol conversion were recorded for 2%, 4%, 6% and 8% Fe 3 O 4 -PVDF composite pieces respectively. Catalyst were separated magnetically and reused several times. On the other hand Fe 3 O 4 blended PVDF membranes provided improved flux and BSA rejection compared with performance of bare PVDF membrane; 41.6% BSA rejection was obtained with 4% Fe 3 O 4 -PVDF whereas it was only 6.7% for PVDF. Fe 3 O 4 -PVDF composites performed high activity for the benzyl alcohol oxidation in batch reactor and also better filtration at filtration cell. These results promise to obtain practical and low cost membrane material for catalytic reactors usable in microwave support to get fast results.