In this work, 0 ,1.5 wt, and 3 wt, of the hydrophilic silica loading were prepared respectively (later denoted as N-0, N-1.5 and N-3), and their effect on the membrane surface properties, equivalent bubble diameter, and volumetric CO2 mass transfer coefficient (kLa) were investigated at a different flow rate (0.05 - 20 ml/s). The results show a slight decrease in pore size diameter of N-3, and N-1.5 without significant change in contact angle. At a low flow rate of 0.1 ml/s the bubble size of N-3 decreased by 50 , which led to an increase of 143 in the kLa compared to N-0. © 2023 Elsevier Ltd. All rights reserved.