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Absorption Characteristics of Carbon Dioxide in Aqueous AMP Solution Adding HMDA  

Choi Won-Joon (Department of Environmental Engineering, Pusan National University)
Cho Ki-Chul (Department of Environmental Engineering, Pusan National University)
Oh Kwang-Joong (Department of Environmental Engineering, Pusan National University)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.21, no.6, 2005 , pp. 605-612 More about this Journal
Abstract
In this study, the possible use of HMDA (Hexamethylenediamine) as additive to enhance reaction between $CO_{2}$ and AMP (2-amino-2-methyl-1-propanol) which has higher absorption capacity than that of MEA (Monoethanolamine) was investigated. Also, the absorption capacity for $CO_{2}$ was compared with addition of HMDA, piperazine or MDEA (N-methyldiethanolamine) into $30\;wt\%$ AMP at $40^{circ}C$ and $CO_{2}$ partial pressure ranging from 0.5 to 120 kPa. Apparent rate constant ($K_{app}$) and absorption capacity with the addition of $5\∼20\;wt\%$ HMDA into AMP increased $214.2\∼276.3\%$ and $29.9\∼91.7\%$ than those of AMP alone. As a result, when $5\;wt\%$ HMDA added into AMP, the increasing rate of the absorption rate and the absorption capacity was found to be the highest. In addition, the absorption capacity increased $6.8\%,\;9.8\%,\;11.6\%$ with addition of MDEA, piperazine or HMDA respectively as compared to AMP alone at $CO_{2}$ partial pressure of 20 kPa. Consequently, HMDA as additive to improve absorption capacity of AMP was superior to other additives.
Keywords
Absorption; Carbon dioxide; AMP (2-amino-2-methyl-1-propanol); HMDA (Hexamethylenedia-mine);
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