(476f) Enhancement of CO2 Desorption Performances in CO2 -Loaded MEA Solution By Using CMK-3 Bifunctional Catalysts

Reduction of the required heat duty and enhancing the desorption rate for amine solvent regeneration in stripping carbon dioxide (CO₂) from a CO₂-rich monoethanolamine (5M MEA) solution have been identified as the major challenges in the CO₂ desorption and amine regeneration process. In this study, to reduce the energy penalty four novel bifunctional heterogeneous catalysts CMK-3-SiO₂ CMK-3-MCM-41 and CMK-3-SBA-15 were synthesized and introduced for the first time to study their catalytic effectiveness on CO₂ desorption and monoethanolamine (MEA) solvent regeneration with an initial CO₂-loading of 0.5±0.01 mol CO₂/mol MEA at 97^oC for 3hours. The synthesized catalysts were characterized by Fourier transform-infrared spectrometry, pyridine-infrared spectroscopy, X-ray diffraction, N₂-adsorption-desorption, and ammonia-temperature programmed desorption. Based on the obtained results the newly CMK-3 mesoprose catalyst can significantly reduce the energy required for CO₂ desorption and the CMK-3-SiO₂ catalyst presented the highest catalytic efficiency compared to the other CMK-3 catalysts and the solid acid catalyst (SZ), 36.5% of energy required was reduced compared to 5M monoethanolamine (MEA) without catalyst and enhance the desorption rate by 73.45%. Additionally, the CMK-3-SiO₂ catalyst exhibited the best catalytic performance compare to the literature with an excellent stability and had no unfavorable effects on the CO₂ absorption activity by the regenerated MEA solvent.