Pressure Change Adsorption Process Analysis (Pressure Swing Adsorption) for the Separation of CO_2 Present in Exhausted Combustion Gases

Abstract

In this work a mathematical model of the absorption stage was developed that allows to analyze in an accurate way the non-stationary state of the non-linear process of capture of CO_2 by pressure change Absorption (PSA), was implemented and resolved in the gPROMS software ( advanced tool for process simulation and optimization) A parametric simulation analysis was performed to study the influence on the absorption efficiency of the main modeling hypotheses, isothermal and non-isothermal conditions, different absorption equilibrium models, selecting the most accurate model compared to experimental data. of absorption. In addition, the performance of different resolving methodologies (method of finite centered differences and orthogonal placement) was investigated in detail. Finally, a sensitivity study of the dimensions (length and diameter) of the absorption unit was carried out