- Title
- Comprehensive kinetic and thermodynamic study of the reactions of CO2(aq) and HCO3− with monoethanolamine (MEA) in aqueous solution
- Creator
- Conway, William; Wang, Xiaoguang; Fernandes, Debra; Burns, Robert; Lawrance, Geoffrey; Puxty, Graeme; Maeder, Marcel
- Relation
- Journal of Physical Chemistry A Vol. 115, Issue 50, p. 14340-14349
- Publisher Link
- http://dx.doi.org/10.1021/jp2081462
- Publisher
- American Chemical Society
- Resource Type
- journal article
- Date
- 2011
- Description
- The temperature dependence of the reversible reaction between CO2(aq) and monoethanolamine (MEA) has been investigated using stopped-flow spectrophotometry by following the pH changes during the reactions with colored acid–base indicators. Multivariate global analysis of both the forward and backward kinetic measurements for the reaction of CO2(aq) with MEA yielded the rate and equilibrium constants, including the protonation constant of MEA carbamate, for the temperature range of 15–45 °C. Analysis of the rate and equilibrium constants in terms of the Arrhenius, Eyring, and van’t Hoff relationships gave the relevant thermodynamic parameters. In addition, the rate and equilibrium constants for the slow, reversible reaction of bicarbonate with MEA are reported at 25.0 °C. At high pH, reactions of the amine with CO2 and with bicarbonate are significant.
- Subject
- stopped flow technique; carbon dioxide; carbamate formation; alkanolamines
- Identifier
- http://hdl.handle.net/1959.13/1064383
- Identifier
- uon:17531
- Identifier
- ISSN:1089-5639
- Language
- eng
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