Simulation of Pressurization Step of a PSA Process using the Multi-Component Lattice Boltzmann Method

The pressurization step of a PSA process has been simulated using the lattice Boltzmann method. The entropic D3Q27 lattice model for the multi-component oxygen-nitrogen combination of air streaming through a packed bed is proposed and a new boundary condition of oxygen and nitrogen adsorption was applied on the granules surface. The Boltzmann method satisfies both the Navier-Stokes equations and the Stefan-Maxwell diffusion equations. In order to evaluate the adsorption rate, the LDF model with the Langmuier multi-component isotherm were used. To verify the correctness of the presented model, the adsorption rate of each component has been compared with those obtained using the Langmuier isotherm model for single and multi-component test cases. Results confirmed the accuracy of the proposed model.