PREDICTING MULTICOMPONENT GAS TRANSPORT IN HYBRID INORGANIC MEMBRANES

摘要

A repeated dip-coating technique has been used to prepare novel inorganic multilayered membranes. The membranes have been characterizated by Scanning Electron Microscopy (SEM) and nitrogen adsorption (ASAP 2010) respectively. The three parameter model incorporating the gas transport characteristics of the hybrid membranes has been adequately described using a combination of Knudsen and Viscous flows. The model has been used to predict gas transport rates through the membranes over a wide range of gas compositions and good agreement has been observed with experimental data. The model has also been applied to estimate the separation layer thickness. The estimated value of 1.6μm is in good agreement with that of 1.62μm observed by scanning electron microscopy. The gases studied include O_2, N_2, He, H_2 and mixtures of O_2/N_2, respectively.