Hydrodechlorination of chlorophenols over Pt- and Co-containing ZSM-5 zeolite catalysts

János Halász, Szilvia Mészáros, István Hannus

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Some of the chlorinated organic compounds are widely used commercially because of their advantageous chemical/physical properties or being toxic to pestiferous living substances. We have prepared and applied monometallic Co-, Pt- and bimetallic Co,Pt-ZSM-5 zeolite catalysts for hydrotreating 2- and 4-chlorophenols in the temperature range of 300-400 oC using a fixed-bed laboratory reactor system equipped with a gas chromatograph for analysis. In the reaction over the Pt-containing catalyst high initial conversion can be observed, the compounds transform to cyclohexanone, however, the activity of the catalyst decreases even during the 2 h reaction time. In the presence of Co-ZSM-5, the main reaction is simple hydrodechlorination resulting in phenol as the main product, and this catalyst is stable, and the activity does not change. The bimetallic catalyst combines the advantages (and disadvantages) of the monometallic samples. The hydroconversion of chlorophenols resulted in the formation of cyclohexanone with high initial selectivity. However, because of the relatively short catalyst lifetime further optimization is necessary before practical application.

Original languageEnglish
Pages (from-to)359-365
Number of pages7
JournalReaction Kinetics and Catalysis Letters
Volume87
Issue number2
DOIs
Publication statusPublished - Apr 2006

Fingerprint

Chlorophenols
catalysts
Catalysts
Catalyst selectivity
Poisons
Phenol
organic compounds
Organic compounds
reaction time
phenols
Phenols
ZSM-5 zeolite
beds
Catalyst activity
Physical properties
physical properties
Gases
selectivity
reactors
life (durability)

Keywords

  • Chlorophenols
  • Cyclohexanone
  • Hydrodechlorination
  • ZSM-5 zeolites

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

Cite this

Hydrodechlorination of chlorophenols over Pt- and Co-containing ZSM-5 zeolite catalysts. / Halász, János; Mészáros, Szilvia; Hannus, István.

In: Reaction Kinetics and Catalysis Letters, Vol. 87, No. 2, 04.2006, p. 359-365.

Research output: Contribution to journalArticle

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