Interdiffusion of gases in cylindrical mixing vessels

Abstract

A qualitative experimental study has been carried out for the interdiffusion of bromine and air in a cylindrical mixing vessel. A time for complete mixing was derived from the appropriate integral form of Fick's equation, which may be compared to the Einstein equation for linear diffusion in an infinite vessel. Tabulated values for diffusion times in several gases emphasise the importance of allowing sufficient time for mixing prior to gas-phase kinetic studies.