Simulation of Nonisothermal Sorption of Gas with Binary Components in Sorbent Particles

A three-dimensional pore diffusion model describing sorption process was presented by considering the effects of the temperature and non-linear sorption isotherm. The model numerically simulates the scenario with the boundary conditions fluctuating in both step change and parabolic change. The rule of variation of temperature and concentrations with sorption time is figured out, and also the comparison with the LDF´s predictions is analyzed. The results show that the prediction of N₂ adsorptions from LDF´s is in good accordance to the results obtained by the model of this paper, but the prediction of O₂ adsorption especially with the step changes is not accurate enough. Therefore, in order to improve the accuracy of simulation of sorption process, it is reasonable to use pore diffusion model.