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Reaction kinetics of carbonyl sulfide with aqueous ethylenediamine and diethylenetriamine

Authors
Journal
Gas Separation & Purification
0950-4214
Publisher
Elsevier
Publication Date
Volume
8
Issue
4
Identifiers
DOI: 10.1016/0950-4214(94)80003-0
Keywords
  • Cos/Polyamines
  • Reaction Kinetics
  • Cos Absorption
  • Stopped-Flow

Abstract

Abstract The reaction in aqueous solution between carbonyl sulfide (COS) and the polyamines ethylenediamine and diethylenetriamine has been studied experimentally using a conductimetric stopped-flow technique. The experimental results indicate that this reaction follows a zwitterion intermediate mechanism leading to: k obs = [Am] 1 k 2 + 1 k Am[Am] + k w[H 2O] Values of the rate constants k 2, k Am and k w at 298 K are reported for both ethylenediamine and diethylenetriamine. Activation energies for k 2, k Am and k w are also reported for diethylenetriamine.

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