Catalytic Conversion CCl3F and CCl2F2 over Metal Supported Catalysts
P. Kirszensztejn1*, L. Wachowski1, A. Szymkowiak1, P. Marciniak1, B. Czajka2, W. Skupiński3
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1Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland
2Central Laboratory of Batteries and Cells, Forteczna 12/14, 61-362 Poznań, Poland
3Faculty of Chemistry, University of Technology, Nowakowskiego 3, 00-664 Warsaw, Poland
Pol. J. Environ. Stud. 2003;12(3):315–323
A comparison of the catalytic properties of metals (Pt, Pd and Ru) supported on carbon in the process of catalytic hydrogenolysis of the C-halogen bond in CCl2F2 (CFC-12) and CCl3F (CFC-11) was made. The mechanism of the halogen substitution in the catalytic conversion of CCl3F was found to differ from that proposed for CCl2F2. The catalysts with Ru as the active phase were characterized by much lower activity than those with Pt or Pd, and the main products of conversion in the two reactions were CHClF2 and CHCl2F, so the products of substitution of only one chlorine atom in the molecule were obtained, in contrast to the case when Pt or Pd were used.