Ozone-enhanced catalytic oxidation of monochlorobenzene over iron oxide catalysts

Hou Chuan Wang, Hsu Shang Liang, Moo Been Chang

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15 Scopus citations

Abstract

In this study, we examined the experimental catalytic oxidation of gaseous monochlorobenzene (MCBz) with O3 over Fe2O3 in a packed bed reactor to investigate the feasibility of economical low temperature decomposition at a high space velocity (SV). We investigated the effects of several reaction parameters (temperature, O3 concentration, and SV) on the MCBz oxidation. At 150°C, the conversion of MCBz over Fe2O3 in the absence of O3 was only 3%; it increased to 91% over Fe2O3 in the presence of 1200ppm of O3 at a high SV of 83s-1. A long-term operation study revealed that the conversion of MCBz was stable for more than 96h. In the steady state, the carbon and chlorine balances were 88% and 86%, respectively. Applying a Langmuir-Hinshelwood kinetic model, we estimated an activation energy of 16.7kJmol-1 for MCBz oxidation over Fe2O3 in the presence of O3.

Original languageEnglish
Pages (from-to)1090-1095
Number of pages6
JournalChemosphere
Volume82
Issue number8
DOIs
StatePublished - Feb 2011

Keywords

  • Iron oxide
  • Kinetics
  • Low temperature
  • Monochlorobenzene oxidation
  • Ozone

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