Address: Centre for Phase Equilibria and Separation Processes (IVC-SEP), Department of Chemical Engineering, Technical University of Denmark, Lyngby DK-2800, Den.
Title: A Model for Estimating CO2 Solubility in Aqueous
Alkanolamines
Source: Industrial & Engineering Chemistry Research 44, no. 9 (2005): 3348-3354
Additional Info: American Chemical Society
Standard No: ISSN: 0888-5885 CODEN: IECRED Language: English
Abstract: Partial pressures of carbon dioxide (CO2) over aq. solns. of
monoethanolamine (MEA), diethanolamine (DEA), and
N-methyldiethanolamine (MDEA) have been correlated using a simple approach where only one chem. equil. reaction is taken into account and assuming ideal gas and ideal liq. properties. The approach combines the Henry's law const. and the chem. reaction equil. const. for the formation of carbamate for primary and secondary alkanolamines (MEA, DEA) or bicarbonate for tertiary alkanolamines(MDEA), resulting in an explicit expression for calcg. the partial pressure of CO2 over an aq. alkanolamine soln. Accurate values for the partial pressure of CO2 are obtained for a limited loading, temp., and pressure range that is useful in modeling CO2 capture from coal-fired power plants. Heat of absorption values derived from the model agree with exptl. data from the literature.
CA Section: Air Pollution and Industrial Hygiene 59
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