ROLE OF GALLIUM SPECIES ON THE DEHYDROCYCLODIMERIZATION OF PROPANE ON ZSM5 CATALYSTS

The transformation of propane was carried out in a flow reactor. The conversion of propane on HZSM5 (0. 2 g) is twice as high as on gallium oxide (0. 2 g). It is slightly higher on the equal-mass mixture of HZSM5 and gallium oxide (0. 4 g) than on HZSM5 (0. 2 g). On gallium oxide, the products pf propane transformation are essentially composed of propene (70 wt. %) and of an equimolar mixture of C//2, mostly olefinic ( greater than 90%), and of C//1. The results obtained with the mixture of Ga//2O//3 and HZSM5 show the transformation of propane on GaHZSM5 is a reaction of bifunctional catalysis as is the hydroisomerization and hydrocracking of alkanes on Pt zeolites r the dehydrocyclodimerization of propane on PtHZSM5 or on PtAl//2O//3.