UV-A-induced autocatalytic oxidation of TCE in fixed-bed reactor with transparent silica-gel adsorbent

Peter Pucher, Gernot Krammer, Rabah Azouani, Kay Chhor, Andrei Kanaev

Research output: Contribution to journalArticle

Abstract

We report on a new approach to the photocatalytic decomposition of gaseous pollutants on inherently non-active nanoporous silica-gel substrate in fix-bed continuous-flow reactor under UV-A illumination. The pollutants and oxidized products (CO/CO2) concentrations were permanently monitored in the current study. The observed effect is of autocatalytic nature and related to a molecular chlorine accumulation and retention onto the strongly adsorbing material with a large BET surface (∼330 m2/g). The chlorine accumulation stage delays the material activity onset during the first reactor run with trichloroethylene (TCE). In subsequent runs, the material develops photocatalytic activity immediately at UV-A illumination. The approach was tested on non-chlorinated hydrocarbons ethylene and methanol that show a high decomposition yield after pre-treatment with TCE or dichloroacetyl chloride (DCAC).
Original languageEnglish
Pages (from-to)58-64
JournalApplied Catalysis / A
Volume345
Issue number1
DOIs
Publication statusPublished - 2008

Treatment code (Nähere Zuordnung)

  • Experimental
  • Theoretical

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