Analysis of CO₂ Pressure Swing Adsorption Simulation by Considering the Transport Phenomena in the Adsorber

Abstract

This study focused on CO 2 separation technology with adsorption. This paper describes the analysis carried out by a CO 2 pressure swing adsorption simulation to scale up the absorber. An unsteady one-dimensional balance model was constructed by considering the material, energy, and momentum. In the CO 2 breakthrough test, the beginning time and CO 2 concentration at outlet of CO 2 breakthrough in the calculation were almost equivalent to that of experiment results. The correlation consistency of the calculation results with the analysis model and the experimental results obtained by a bench scale experiment was evaluated. The transport phenomena in the adsorber were investigated at the adsorption, rinse, and desorption steps according to the calculation results. The starting time of CO 2 breakthrough obtained by the analysis is equal to that obtained by the adsorption breakthrough experiment. This confirms that the CO 2 adsorption, and the temperature and velocity distribution in the adsorber, change as a function of the adsorption, rinse, and desorption steps, respectively. Additionally, the CO 2 concentration of the captured gas and the amount of CO 2 quantity were 93.4% per day and 2.9 ton/day, respectively. These values are equal to those obtained by the bench scale experiment.