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A Study on Gas Transfer Characteristics of Porous Materials with Liquid Water by Considering Their Pore Size Distribution

In this study, the gas transfer characteristics for porous materials with liquid water are studied, and the methods for calculating relative permeability and relative diffusivity of gas in a porous material by considering its pore size distribution are proposed. The calculation results show not only that the saturation has an impact, but also that the pore size distribution of the gas diffusion layer should be considered when calculating the relative diffusivitiy of a porous material with liquid water. In addition, the relative diffusivity calculated by the simplified formula proposed in this paper is closer to the experimental result than that obtained by other researchers. Moreover, the formulas proposed in this paper explain why porous materials with different pore size distributions have similar relative diffusivity obtained through experments by other researchers.