Simulation of separation processes using finite volume method

In this work we present a comparison of different discretization techniques, in the context of finite volume formulation, for the solution of separation processes involving adsorption, absorption and permeation. The mathematical model developed assumes axially dispersed plug-flow, uniform bed/sorbent/membrane properties along the axial coordinate and negligible radial gradients. The algorithm used enforces both local and global flux conservation in space and time. The discretization of convection terms is made using unbounded schemes and bounded high-resolution schemes. We use the same strategy for simulating three different separation processes: membrane permeation, pressure swing adsorption and simulated moving bed. In the case of membrane permeation we present simulation results of air separation using a polysulfone membrane and compare t m s s c m