Journal article
Catalytic hydrodehalogenation of halon 1211 (CBrClF2) over γ-alumina-supported Ni, Pd and Pt catalysts
Catalysis Today, Vol.88(3-4), pp.183-194
2004
Abstract
The hydrodehalogenation of halon 1211 over Ni, Pd and Pt supported on γ-alumina was studied. The effect of reaction temperature and hydrogen/halon 1211 input ratio was examined. Steady state catalytic activities of Pd and Pt are very similar, and much higher than that of Ni. Hydrodehalogenation over Pd favours the formation of CH2F 2, while Pt and Ni produce primarily CH4 and CH 3F, respectively. Product profiles suggest that the hydrodehalogenation of halon 1211 over Pd and Pt follows a reaction mechanism which is similar to hydrodehalogenation of CFC-12. Over Ni catalysts, the primary hydrodehalogenation reactions are those which first remove one halogen (Cl or Br) and then remove two halogens (one F and either Br or Cl). The higher mobility of hydrogen atom on the surface of Pt is consistent with the observation that only trace amounts of C2+ hydrocarbons were detected when Pt was used compared with Pd and Ni. Increasing selectivity to CH2F2 with time on stream over Pd and Pt is mainly ascribed to the transformation of support alumina to partially fluorinated alumina.
Details
- Title
- Catalytic hydrodehalogenation of halon 1211 (CBrClF2) over γ-alumina-supported Ni, Pd and Pt catalysts
- Authors/Creators
- H. Yu (Author/Creator) - University of Newcastle AustraliaE.M. Kennedy (Author/Creator) - University of Newcastle AustraliaMd Azhar Uddin (Author/Creator)B.Z. Dlugogorski (Author/Creator) - University of Newcastle Australia
- Publication Details
- Catalysis Today, Vol.88(3-4), pp.183-194
- Publisher
- Elsevier
- Identifiers
- 991005543164707891
- Copyright
- © 2003 Elsevier B.V.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- 2 Chemistry
- 2.90 Water Treatment
- 2.90.1763 Zero-Valent Iron
- Web Of Science research areas
- Chemistry, Applied
- Chemistry, Physical
- Engineering, Chemical
- ESI research areas
- Chemistry