Abstract
In this study, an experimental method for estimating the relative membrane mass transfer resistance (RmHFMC) by comparing the results obtained using a ceramic hollow fiber membrane contactor (HFMC) with those obtained using a wetted-wall column (WWC) was proposed. The method was successfully applied for the determination of the optimal pore structure to increase the CO2 absorption. To find a relationship between relative RmHFMC in the ceramic HFMCs and its pore characteristics, the method was tested on two ceramic HFMCs prepared by non-solvent induced phase separation method. The pore structures were analyzed by scanning electron microscopy, capillary flow porometry, and gas permeability measurements. The results obtained show that the relative RmHFMC contribution ranged from ∼90 to ∼27% of the overall mass transfer resistance (RoHFMC) and was related to the variation of the pore structure properties. To the best of our knowledge, this is the first study to estimate the relative RmHFMC element of the ceramic HFMC through an experimental comparison with a WWC performed in the same experimental conditions. The proposed method is expected to provide a practical solution for estimating the relative RmHFMC of the ceramic HFMCs.
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