Kinetics of the gas-solid heterogeneous photocatalytic oxidation of trichloroethylene by near UV illuminated titanium dioxide

Lynette A. Dibble, Gregory Raupp

Research output: Contribution to journalArticle

193 Scopus citations

Abstract

Kinetics of the gas/solid heterogeneous photocatalytic oxidation of dilute trichloroethylene (TCE) vapors by ultraviolet-illuminated titanium dioxide have been determined using a fixed-bed dynamic photoreactor. Reaction rate dependences on inlet TCE, oxygen and water vapor concentrations were found to consist of both reactant sensitive and insensitive regions. In the reactant sensitive regions, measured limiting apparent reaction rate orders for TCE, oxygen and water vapor are 0.8, 1.7 and - 3, respectively. Water vapor in the reactant stream lowers initial reaction rates relative to corresponding water free conditions, but is required to sustain photocatalytic activity for extended periods of time.

Original languageEnglish (US)
Pages (from-to)345-354
Number of pages10
JournalCatalysis Letters
Volume4
Issue number4-6
DOIs
StatePublished - Jul 1 1990

Keywords

  • Ultraviolet heterogeneous photocatalysis
  • kinetics
  • oxidation
  • titania
  • trichloroethylene

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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