A review of Professor Paul Grange's contribution to the development of oxynitrides in acid-base catalysis
(2004) 4th International Symposium on Nitrides — Location: Mons(Belgium) (17.November.2003)
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- Abstract
- This article deals with the most innovative results obtained by Professor Paul Grange (Universite catholique de Louvain, Unite de catalyse et chimie des materiaux divises, 1943-2003) related to the synthesis, characterisation and evaluation of the catalytic properties of oxynitride catalysts. Examples of catalysts developed are phosphate oxynitrides, in particular nitrided aluminophosphate (AlPON), alumino gallophosphate (AlGaPON) and zirconophosphate (ZrPON), as well as aluminium vanadate oxynitride (VAlON). These solids are obtained by heating reactive amorphous oxide precursors under ammonia flow, at temperatures ranging from 400 to 800degreesC. The nitridation conditions determine the final nitrogen content of the samples. The acid-base properties of these catalysts are strongly dependent on their nitrogen enrichment: their acidity decreasing and their basicity increasing with the nitrogen content. These oxynitrides were tested in various reactions: condensation, dehydrogenation, dehydration, ammoxidation,... and in several cases, because of their adjustable acid-base properties, they proved to be more active and selective than conventional oxide catalysts.
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Delsarte, S. (2004). A review of Professor Paul Grange’s contribution to the development of oxynitrides in acid-base catalysis. Silicates Industriels : ceramic science and technology, 69(5-6), 44-52. https://hdl.handle.net/2078.5/65217 (Original work published 2004)