Recycle tubular reactor model with axialdispersion leads to a special boundary value problem, in which one boundary condition involves the values at two end points.
The axialdispersion in chromatography models was discussed with vector method and the effect of diffusion on the bulk flow flux with its partial quantity form was pointed too.
Based on the experimental results, the flow pattern in the settling section and the circulating section of reactor were analyzed by axialdispersion model and tank-in-series model, respectively.