Kinetics study of a dichlorotriazine reactive dye in supercritical carbon dioxide

M. V. Fernandez Cid*, M. Van Der Kraan, W. J T Veugelers, G. F. Woerlee, G. J. Witkamp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

The kinetics of the reaction between a dichlorotriazine reactive dye and methanol was studied in supercritical carbon dioxide and in a solution of pure methanol. The experiments were carried out in a batch reactor at different temperatures between 333 and 393 K and at 300 bar when supercritical carbon dioxide was the solvent medium. The rate constants and the parameters of the Arrhenius equation were determined and compared. A significant influence of the supercritical carbon dioxide on the rate constants was found. The formation of methoxy-dye was faster over the whole temperature range in pure methanol than in supercritical carbon dioxide. But the consecutive reaction, the formation of dimethoxy-dye, was considerably faster, up to 20 times, in supercritical carbon dioxide than in pure methanol. Moreover, the lowest value for the activation energy, 50 ± 13 kJ mol-1, was found for the consecutive reaction in supercritical carbon dioxide. In this paper new kinetic data for the methanolysis reaction of a dichlorotriazine reactive dye in supercritical carbon dioxide are shown.

Original languageEnglish (US)
Pages (from-to)147-152
Number of pages6
JournalJournal of Supercritical Fluids
Volume32
Issue number1-3
DOIs
StatePublished - Dec 1 2004
Externally publishedYes

Keywords

  • Cotton
  • Dichlorotriazine reactive dye
  • Kinetics
  • Supercritical carbon dioxide
  • Textile dyeing

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Science (miscellaneous)
  • Physics and Astronomy (miscellaneous)

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