Investigation of Pt-Re/Al_2O_3-ZrO_2 catalysts for n-heptane reforming

摘要

Acid-base properties of the Pt-Re catalysts supported on the initial and zirconium-modified alumina were studied. The introduction of 0.1 wt.% ZrO_2 into the Pt-Re/Al_2O_3 catalyst was shown to increase the total concentration of Lewis acid sites (LAS) and concentration of the moderate strength sites. The catalytic properties of Pt-Re/Al_2O_3-yZrO_2 systems were examined in dehydrocyclization of n-heptane. The optimal amount of zirconia for modification of the reforming catalyst was found to be 0.1-0.4 wt.%.