Abstract
Computational chemistry is a promising technique for the prediction of material properties. Adsorption and diffusion behaviors in zeolite micropores are important for zeolite membranes. In this study, we investigated novel non-bonding interaction parameters of all-silica zeolites for the prediction of the adsorption and diffusion behaviors by focusing on the Si atom of zeolite frameworks. Our parameters (σ = 0.421 nm, ε = 0.954 kJ mol(-1), and q = +1.10 e) were close to theoretically derived values, and the adsorption isotherms of CO(2) and CH(4) on several zeolites could be predicted with high accuracy. Furthermore, the parameters gave the suitable self-diffusivities of CO(2) and CH(4) within MFI-type zeolite micropores through molecular dynamics simulation. Those suggest that our derived parameters are useful for selecting zeolite structure as the membrane material.