TY - JOUR ID - 80765 TI - Propionic acid extraction in a microfluidic system: simultaneous effects of channel diameter and fluid flow rate on the flow regime and mass transfer JO - Iranian Journal of Chemical Engineering(IJChE) JA - IJCHE LA - en SN - 1735-5397 AU - Hosseini, F. AU - Rahimi, M. AU - jafari, O. AD - CFD Research Center, Chemical Engineering Department, Razi University, Kermanshah, Iran Y1 - 2018 PY - 2018 VL - 15 IS - 4 SP - 48 EP - 62 KW - Extraction KW - propionic acid KW - microfluidic KW - Channel Diameter DO - N2 - In this work, extraction of propionic acid from the aqueous phase to the organic phase (1-octanol) was performed in T-junction microchannels and effects of channel diameter and fluid flow rate on the mass transfer characteristics were investigated. The two-phase flow patterns in studied microchannels with 0.4 and 0.8 mm diameters were observed. Weber ‎ number and surface-to-volume ratio were calculated for evaluating flow patterns. Moreover, the effect of volumetric flow rates on the extraction ‎efficiency, volumetric mass transfer coefficient, and pressure drop was examined. Results showed that the pressure drop in the microchannel with 0.4 mm diameter is 2-2.7 times higher than that in the microchannel with 0.8 mm diameter. In both microchannels, with increase in flow rate, the extraction ‎efficiency first increases and then decreases. In addition, at high flow rates (2.4, 4.5 and 6 mL/min), the extraction ‎efficiency in the microchannel with 0.8 mm diameter increased up to the range of 7-14.9 % compared with that in the microchannel with 0.4 mm diameter. UR - https://www.ijche.com/article_80765.html L1 - https://www.ijche.com/article_80765_4d2f1ed52702a74eb86c5198e9541c3b.pdf ER -