Kinetics of COS with primary and secondary amines in aqueous solutions


Littel, R.J. and Versteeg, G.F. and Swaaij, W.P.M. van (1992) Kinetics of COS with primary and secondary amines in aqueous solutions. AIChE Journal, 38 (2). pp. 244-250. ISSN 0001-1541

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Abstract:The reaction between COS and aqueous solutions of primary and secondary amines has been studied by means of the stirred cell technique. Kinetic experiments at temperatures 283 to 333 K were carried out with MEA, DGA, DEA, DIPA, MMEA, AMP, and MOR. All kinetic experiments could be described by a zwitterion reaction mechanism similar to the mechanism proposed by Caplow (1968) for the reaction between CO2 and secondary amines.
Analysis of concentrated amine solutions at high COS concentrations by various analytical techniques confirmed the conclusions from the kinetic experiments. For all amines except for MEA, the overall reaction rate was found to be determined entirely by the zwitterion deprotonation rate.
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Copyright:© 1992 Wiley InterScience
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