High Surface Area Metal Fluorides as Catalysts

High Surface Area Metal Fluorides as Catalysts 71... 

Catalysis For technical reasons it can be necessary to have a catalytic active sohd material supported to improve, e.g., its mechanical stability and reduce its flow resistance when used in a flow reactor. The sol-gel fluorination synthesis provides a convenient way for depositing high surface area metal fluorides on supports. For example, HS-AIF3, which as fine powder makes problems when used as catalyst in flow systems, could be supported by Y-AI2O3 whereby its Lewis acidity and consequently its catalytic activity remains almost unchanged [64]. For other catalytic applications, like micro-reactor techniques, deposition of catalytically active thin layers of metal fluorides is also of interest. 

J. Krishna Murthy, U. GroB, St. Rudiger, E. Unveren and E. Kemnitz, Mixed metal fluorides as doped Lewis acidic catalysts systems a comparative study involving novel high surface area metal fluorides, J. Fluorine Chem., 125, 937-949 (2004). 

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