Extended batch adsorber analogue model (e‐ BAAM ) for rapid evaluation of CO ₂ capture pressure swing adsorption cycles

This work presents a simplified extended‐batch adsorber analogue model (e‐BAAM) to quantify key performance metrics such as purity, recovery, and energy trends for various pressure swing adsorption (PSA) process cycles for capture. The e‐BAAM assumes the column is isothermal, well‐mixed with no spatial gradients of intensive process variables, and that the solid and gas phases are at equilibrium. Such an assumption simplifies the model equations to coupled ordinary differential equations that are independent of time and space, thus allowing for unique graphical capabilities and the elimination of cyclic steady state calculations. This study focuses on the visualization and rapid screening of four different PSA processes, including complex cycles with pressure equalization steps. A method for predicting if a given adsorbent+cycle combination will meet US Department of Energy purity‐recovery requirements for capture is also proposed. Additionally, the e‐BAAM's ability to quickly predict energy consumption trends is illustrated by comparing common capture adsorbents, such as Zeolite 13X, IISERP‐MOF 2, UTSA‐16, and CALF‐20.