Kinetics of the reaction of carbon dioxide with blends of amines in aqueous media using the stopped-flow technique

The kinetics of bromination of the 1,2-dihydro-1,3-dimethyl-2-oxopyrimidinium cation (Q+) in aqueous media (pH 0–5) have been studied using the stopped-flow method. At the higher acidities (pH < 2) the results are consistent with rate determining attack by bromine upon the pseudobase (QOH), whereas at low acidities (pH > 4) it appears that pseudobase formation is rate determining. The change occurs because at high acidity the reversal of the pseudobase QOH to the cation is fast relative to bromine attack, whereas at low acidity the converse is true. Results obtained at intermediate acidities (pH 2–4) are consistent with this interpretation.A separate kinetic study of pseudobase formation (and decomposition) yielded rate constants in good agreement with those derived from the bromination study.

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ChemInform Abstract: Stopped-Flow Investigations of the Reaction Kinetics of Carbon Dioxide with Some Primary and Secondary Alkanolamines in Aqueous Solutions

Chemischer Informationsdienst ◽

10.1002/chin.198633117 ◽

1986 ◽

Vol 17 (33) ◽

Author(s):

D. BARTH ◽

C. TONDRE ◽

J.-J. DELPUECH

Keyword(s):

Carbon Dioxide ◽

Aqueous Solutions ◽

Reaction Kinetics ◽

Stopped Flow ◽

Kinetics Of

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Kinetics of Carbon Dioxide with Amines. I. Stopped-Flow Studies in Aqueous Solutions. A Review

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles ◽

10.2516/ogst/2013150 ◽

2013 ◽

Vol 69 (5) ◽

pp. 865-884 ◽

Cited By ~ 28

Author(s):

Gabriel Couchaux ◽

Danielle Barth ◽

Marc Jacquin ◽

Abdelaziz Faraj ◽

Julien Grandjean

Keyword(s):

Carbon Dioxide ◽

Aqueous Solutions ◽

Stopped Flow ◽

Kinetics Of

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Reaction Kinetics of Carbon Dioxide in Aqueous Diethanolamine Solutions Using the Stopped-Flow Technique

Ecological Chemistry and Engineering S ◽

10.2478/v10216-011-0006-y ◽

2012 ◽

Vol 19 (1) ◽

pp. 55-66 ◽

Cited By ~ 5

Author(s):

Marta Siemieniec ◽

Hanna Kierzkowska-Pawlak ◽

Andrzej Chacuk

Keyword(s):

Carbon Dioxide ◽

Reaction Kinetics ◽

Rate Constants ◽

Reaction Rate ◽

Reaction Rate Constant ◽

Stopped Flow ◽

First Order ◽

Pseudo First Order ◽

Kinetics Of ◽

Good Agreement

Reaction Kinetics of Carbon Dioxide in Aqueous Diethanolamine Solutions Using the Stopped-Flow Technique The pseudo-first-order rate constants (kOV) for the reactions between CO2 and diethanolamine have been studied using the stopped-flow technique in an aqueous solution at 293, 298, 303 and 313 K. The amine concentrations ranged from 167 to 500 mol·m-3. The overall reaction rate constant was found to increase with amine concentration and temperature. Both the zwitterion and termolecular mechanisms were applied to correlate the experimentally obtained rate constants. The values of SSE quality index showed a good agreement between the experimental data and the corresponding fit by the use of both mechanisms.

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