Numerical model for separation of H–D gas mixture in batch-type concentric-tube thermal diffusion columns

The modeling simulation for the separation of H–D gas mixture in batch-type concentric-tube thermal diffusion columns have been analyzed from the transport equation coupled with the application of mass balance. The most important assumption is that the concentrations of H2, HD and D2 are locally equilibrium at every points in the column as H2 + D2 ↔ 2HD. The concentration distribution equation was derived and the concentration difference between the bottom and top ends of the column could be estimated. The degree of separation and separation factor for recovery of deuterium from H–D gas mixture in the batch-type cryogenic-wall thermal diffusion column were estimated.