CO2 Absorption and Regeneration Using Amines with Different Degrees of Steric Hindrance. Issue 10 (11th September 2017)

• Record Type: Journal Article
• Authors: Gómez-Díaz, Diego; Navaza, José M.; Rodríguez, Pablo; Vega, Raquel
• Is Part Of: Chemical engineering & technology. Volume 40:Issue 10(2017)
• Page Start: 1767
• Page End: 1773
• Publication Date: 2017-09-11
• Subjects: Absorption -- Amines -- Carbon dioxide -- Regeneration -- Steric hindrance; Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.201600486
• Languages: English
• ISSNs: 0930-7516

Abstract

Abstract: The influence of steric hindrance in amines upon different characteristics in carbon dioxide chemical absorption, namely, absorption rate, carbon dioxide loading, and regeneration degree, has been analyzed. Aqueous solutions of monoethanolamine, 1‐amino‐2‐propanol, and 2‐amino‐2‐methyl‐1‐propanol were used to compare their behavior during carbon dioxide absorption. The presence of one or two methyl groups on the carbon next to the amino group produced changes in the analyzed parameters. In addition, the influences of the gas‐flow rate and amine concentration on the chemical solvent behavior were studied to improve the mass transfer under different experimental conditions. Abstract : Carbon dioxide separation by chemical‐absorption processes can be used to reduce toxic emissions and enhance carbon dioxide purification. Solutions of sterically hindered amines can be used for this purpose. The influence of steric hindrance in amines on absorption rate, carbon dioxide loading, and regeneration degree during carbon dioxide chemical absorption has been studied.