| 초록 |
Amorphous silica membrane is prepared and non-adsorbed gas permeation is permeated using molecular dynamics (MD) simulation. The permeation is observed and the permeability of each gas is estimated from the number of permeated molecules. It is compared with experimental data and the macroscopic equation of membrane system. In this study, helium and nitrogen are passed through a silica membrane. The permeability is evaluated for various operation conditions. For helium gas, Knudsen diffusion is followed in a low pressure region. The permeability agrees with experimental values. And viscous flow is shown in a high pressure region. In case of nitrogen gas, Knudsen diffusion is a major separation mechanism. The permeability of both gases decreases with temperature. |
