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Benzene-Linked Amine

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In an attempt to meet climate emissions goals, scientists are obtaining and using carbon dioxide emitted by power plants and other sources. In theory, carbon dioxide is easy to capture. This is because it is acidic, and it reacts effortlessly with simple bases like amines. In practice, however, amine scrubbing, the method used by some power plants to capture carbon dioxide for cleaning flue gases, is defeated because it encloses the greenhouse gas in water-based solutions. An abundance of energy is required to heat these great amounts of water in order to release the carbon dioxide that was captured and to renew the amines.
To address this problem, Fuyuhiko Inagaki along with his research team at Kanazawa University disclose a group of amines that absorb carbon dioxide but not water, possibly decreasing the amount of energy that is needed to run the scrubbing process. Inagaki and his colleagues, who are all medicinal chemists, created the amines while trying to produce a dry stream of carbon dioxide from air for use as a constituent for …show more content…

They tested the carbon dioxide absorption ability of many types of benzene-linked amines, ranging from simple benzylamine to xylylenediamines. Then the group exposed the best-performing amines to open air for two weeks to figure out the amount of water absorbed relative to carbon dioxide. The researchers concluded that the xylylenediamines were the most promising: They absorbed absolutely no water. In comparison, monoethanolamine, the typical compound used in the process of amine scrubbing, absorbed three molecules of water for every molecule of carbon. The xylylenediamine carbon dioxide product precipitated as a white solid that had no water when the research group dissolved the best-performing xylylenediamine in water and exposed the solution to

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