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Kinetics of CO 2 absorption by aqueous mixtures of N , N ′‐diethylethanolamine and polyamines
Author(s) -
Joseph Elizabeth B.,
Vaidya Prakash D.
Publication year - 2019
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.21236
Subject(s) - chemistry , aqueous solution , kinetics , reactivity (psychology) , reaction rate constant , propylamine , absorption (acoustics) , nuclear chemistry , organic chemistry , amine gas treating , medicine , physics , alternative medicine , pathology , quantum mechanics , acoustics
Aqueous solutions of N , N ʹ‐diethylethanolamine (DEEA) are prospective high‐capacity CO 2 ‐capturing solvents. Their reactivity can be enhanced by promotion with absorption activators. Two polyamines were chosen as activators in this work, viz. (methylamino)propylamine (MAPA) and diethylene triamine (DETA). In a stirred cell reactor, kinetics of CO 2 absorption into aqueous DEEA/MAPA and DEEA/DETA mixtures was studied at 303 K. The molarity of DEEA was varied in the 2–2.5 M range, whereas the polyamine concentration was changed between 0.1 and 0.5 M. Pseudo–first‐order rate constants were reported. Second‐order rate constants for the CO 2 reactions with MAPA and DETA were determined too. DETA reacts faster than MAPA.