Kinetics of Acetic Acid Oxidation in Snpeicritical Water

Phillip E. Savage, Michael A. Smith

Research output: Contribution to journalArticle

60 Scopus citations

Abstract

Acetic acid was oxidized in supercritical water in batch microreactors at temperatures between 380 and 440 °C. The acetic acid concentrations ranged from 1.0 x 10-4 to 5.2 x 10-3 M, the oxygen concentrations ranged from 5.7 x 10-3 to 7.1 x 10-2 M, and the water density ranged from 6.7 to 25 M. Oxygen was always present in at least 3.5 times the stoichiometric amount required for complete oxidation. Analysis of the kinetics data showed that the global oxidation rate law was first order in acetic acid, 0.6 order in oxygen, and second order in water. The global rate constant has a pre-exponential factor of 1019.8 M-2.6 s-1 and an activation energy of 73.6 kcal/mol. This rate law also satisfactorily describes other sets of experimental data in the literature for the oxidation of acetic acid in supercritical water.

Original languageEnglish (US)
Pages (from-to)216-221
Number of pages6
JournalEnvironmental Science and Technology
Volume29
Issue number1
DOIs
StatePublished - Jan 1995

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

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