Kinetics of Absorption of Carbon Dioxide into Aqueous 2-Amino-2-ethyl-1,3-propanediol Solutions

Autor:	Jae Keun Lee, Sang Jun Yoon and, Ji-Ho Yoon, Huen Lee, Jae-Goo Shim, and Byung-Yeon Min, Hee-Moon Eum
Rok vydání:	2002
Předmět:	Aqueous solution General Chemical Engineering Inorganic chemistry Kinetics Concentration effect General Chemistry Industrial and Manufacturing Engineering chemistry.chemical_compound Reaction rate constant chemistry Zwitterion Organic chemistry Amine gas treating Absorption (chemistry) Solubility
Zdroj:	Industrial & Engineering Chemistry Research. 41:3651-3656
ISSN:	1520-5045 0888-5885
DOI:	10.1021/ie0200252
Popis:	Chemical reaction kinetics of CO2 with a sterically hindered amine, 2-amino-2-ethyl-1,3-propanediol (AEPD), in aqueous solutions has been studied by a wetted-wall column absorber. Three reaction temperatures of 305.15, 313.15, and 318.15 K and AEPD concentration ranges from 5 to 25 wt % APED were chosen. Specific absorption rates as a function of CO2 partial pressure in aqueous AEPD solutions were measured as well. The N2O analogy was applied to estimate the physicochemical properties of CO2 in amine solutions. Based on the zwitterion mechanism, the zwitterion deprotonation and second-order rate constants were calculated and presented at each temperature. The second-order rate constants, k2, were found to be 378, 855, and 1278 m3·kmol-1·s-1 at 303.15, 313.15, and 318.15 K, respectively.
Databáze:	OpenAIRE
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