(490b) Parametric Study of Intensified CO2 Capture Using a Nonaqueous Solvent

In solvent-based, point-source CO₂ capture systems where the reaction between CO₂ and amines is highly exothermic, thermal management is critical for optimizing the efficiency of CO₂ absorption columns. This study explores the use of a nonaqueous solvent designed to significantly reduce thermal regeneration demands, with specific reboiler duties reported at 2.59−2.63 GJ/t-CO₂ for coal flue gas and 3.08−4.19 GJ/t-CO₂ for natural gas-derived flue gases. The focus is on the demonstration of a 0.3-m diameter, 0.4-m height additively manufactured intra-stage cooling system, the intensified packing device, for enhanced heat and mass transfer in a CO₂ absorption column. We will compare thermal management effects of nonaqueous solvents against conventional aqueous solvents (30% MEA) through a parametric study, focusing on CO₂ capture efficiency for coal and natural gas-derived flue gases. Rate-based modeling is integrated within this study to validate experimental findings and assess the feasibility of the intensified packing. We will also examine the potential for column size reduction through application of multiple intensified packing elements along the column. The findings of this research will highlight the importance of thermal control in point-source CO₂ capture processes and pave the way for more efficient design approaches in industrial absorption processes.