Study of Catalytic CO(2) Absorption and Desorption with Tertiary Amine DEEA and 1DMA-2P with the Aid of Solid Acid and Solid Alkaline Chemicals

Studies of catalytic CO(2) absorption and desorption were completed in two well-performed tertiary amines: diethylmonoethanolamine (DEEA) and 1-dimethylamino-2-propanol (1DMA-2P), with the aid of CaCO(3) and MgCO(3) in the absorption process, and with the aid of γ-Al(2)O(3) and H-ZSM-5 in the desorption process. The batch process was used for CO(2) absorption with solid alkalis, and the recirculation process was used for CO(2) desorption with solid acid catalysts. The CO(2) equilibrium solubility and pKa were also measured at 293 K with results comparable to the literature. The catalytic tests discovered that the heterogeneous catalysis of tertiary amines on both absorption and desorption sides were quite different from monoethanolamine (MEA) and diethanolamine (DEA). These results were illustrative as a start-up to further study of the kinetics of heterogeneous catalysis of CO(2) to tertiary amines based on their special reaction schemes and base-catalyzed hydration mechanism.