Isobutane dehydrogenation on various platinum supported mixed metallophosphate oxynitride catalysts MM′PON (M = Al, M′ = Ga,Cr)

The very first results of isobutane dehydrogenation over metal-supported mixed metallophosphate oxynitrides AlMIIIPON (MIII = Ga, Cr) are presented. Catalytic tests show that the substitution of oxygen by nitrogen in the anionic network involves the appearance of new and more active sites. The substitution of a part of aluminium by gallium in oxynitride compounds increases significantly the activity while chromium does not modify to a great extent the conversion of isobutane.