Enhanced Kinetic Performance of Amine-Infused Hydrogels for Separating CO2 from CH4/CO2 Gas Mixture

The performance of amine-infused hydrogels (AIH) was investigated for capturing CO 2 from CH 4 /CO 2 gas mixture. The amine-infused hydrogel was prepared via simply mixing monoethanolamine (MEA) solution with dried hydrogel particles; then, systematic experiments were carried out to analyze the performance of the AIH particles. The obtained results suggest that the AIH particles quickly capture CO 2 from the CH 4 /CO 2 gas mixture with high selectivity, resulting in increased CO 2 uptake capacity compared to that of the MEA solution. The kinetic performance for CO 2 absorption was also investigated by varying the temperature, providing the mixing, and adding an additive. Higher temperatures showed a slightly faster CO 2 absorption rate in early stage. Mixing the AIH particles with the gas mixture increased the absorption rate, but the absorption capacity was dependent on the characterist…