Multicomponent diffusion of gases in microscale and nanoscale confined geometries is determining the integral behaviour and efficiency of many natural and technical processes. In such small systems the gas is in a state referred to as rarefied where diffusion is the dominating, and hence limiting, transport mechanism. Considerable enhancement on the macroscale in, e.g., membrane gas separation, heterogeneous catalysis, and microelectromechanical systems is only possible when understanding the dependence of gaseous rarefaction on multicomponent diffusion fundamentally.
In this project the dependencies of multicomponent effects on both gaseous rarefaction and pore geometry are studied experimentally and theoretically. Therefore, a Two-Bulb-Diffusion cell is realized in order to validate the developed mathematical models over a wide range of gaseous rarefaction.