Add time:08/24/2019         Source:sciencedirect.com

Publisher SummaryThe problem of global climate change due to greenhouse gases is important for development of energy and power technology. The study for removing carbon dioxide (CO2) for refinery gases has been in many ways. The CO2 absorption into a liquid agent is the most commonly used process for the bulk removal of carbon dioxide. Alkanolamines, such as monoethanolamine (MEA) have been used as absorption agents and successfully applied in industrial processes. This chapter presents a study in which 2-amino-2-ethyl-1, 3-propanediol (AEPD), and a sterically hindered amine was studied for CO2 absorbent. Due to its structural bulkiness, the sterically hindered amine provides several advantages over other amines, such as MEA in terms of its high CO2 loading capacity and easy regeneration. A hindered amine reacts with CO2 and produces very unstable carbamates and these unstable carbamates can be readily hydrolyzed to re-form free amines. The solubilities of CO2 in aqueous solutions of 2-amino-2-ethyl-1, 3-propanediol (AEPD) were measured at 313.15, 323.15, and 333.15K over the partial pressure range of CO2 from 1 to 3000kPa. The concentrations of aqueous AEPD solutions were 10 and 30 mass%. The solubilities of carbon dioxide in aqueous 10 mass% AEPD solutions at 313.15 K and 30 mass% at 333.15 K were compared with those in aqueous solutions of various amines, such as MEA, 2-amino-2-methyl-l, 3-propanediol (AMPD), 2-amino-2-methyl-l-propanol (AMP), and N-methyldiethanolamine (MDEA).

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