Oxygen mass transfer in a gas/membrane/liquid system surrogate of membrane blood oxygenators

摘要

> Oxygen mass transfer in a membrane blood oxygenator (MBO) surrogate system has been addressed in this work. It consists of a slit for water circulation as a surrogate blood flow channel and a constant pressure oxygen chamber separated by an integral asymmetric hemocompatible polyurethane‐based membrane. The oxygenated stream enters a well‐mixed reservoir of constant volume, V , for the oxygen average concentration, C O 2 , measurement as a function of time, t. In a range of short times, the linearity of C O 2 vs. t allows the direct determination of the permeation fluxes J O 2 , with no recourse to dimensionless correlations for the determination of mass‐transfer coefficients. The experimental fluxes are in very good agreement with the predictions based in unidimensional axial convection and unidimensional transversal diffusion. This custom‐made benchmark system allows the optimization of the flow and oxygen mass transfer for the design of a novel flat‐sheet MBO. ? 2018 American Institute of Chemical Engineers AIChE J , 64: 3756–3763, 2018