Premium
Hydrogenolysis of organochlorinated pollutants: Parallel hydrodesulfurization of methylthiophene and hydrodechlorination of dichlorobenzene over carbon‐supported nickel, molybdenum and nickel–molybdenum sulfide catalysts
Author(s) -
Frimmel Jiří,
Zdražil Miroslav
Publication year - 1995
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280630103
Subject(s) - hydrodesulfurization , catalysis , sulfide , hydrogenolysis , molybdenum , nickel , chemistry , nickel sulfide , sulfur , inorganic chemistry , dichlorobenzene , sulfidation , organic chemistry
The sulfide catalysts Ni/C, Mo/C, Ni–Mo/C and Ni–Mo/alumina were compared in parallel hydrodesulfurization (HDS) of 3‐methylthiophene and hydrodechlorination (HDC) of o ‐dichlorobenzene in a flow reactor at 1 MPa and 300°C. The work was related to the disposal of chlorinated organic wastes contaminated by sulfur. The magnitude of the synergism in activity between Ni and Mo in the composite Ni–Mo catalyst observed both for HDS and HDC was significantly smaller for HDC than HDS. HDC was faster than HDS over all catalysts studied. The Ni/C sample exhibited the highest selectivity to HDC versus HDS and also surprisingly high HDC activity, which was higher than that of the commercial Ni–Mo/alumina catalyst. It was concluded that HDC and HDS can be uncoupled by changing the active sulfide phase and that significant room exists to develop sulfide HDC catalysts with better activity than the conventional Co–Mo or Ni–Mo/alumina catalysts.