VANADIUM-OXIDE LOADING ON ALUMINOPHOSPHATE MOLECULAR-SIEVE BY VAPOR ADSORPTION

Abstract

Vanadium oxide has been loaded onto an AlPO4-5 surface by vapor phase adsorption followed by hydrolysis and calcination. The vanadium oxide was well dispersed on the AlPO4-5 surface, including the pores, without significant modification of acidity. The vanadium site could be used as a catalytically active site in reactions such as dehydrogenation without interfering with the acid sites. The conversion in ethylbenzene dehydrogenation and the selectivity toward styrene increased up to V2O5 content of about 2%. The vanadium species are first adsorbed on the surface of AlPO4-5 and then progressively in the pores.