Jl. Dong et al., INFLUENCE OF STRUCTURE AND ACIDITY-BASICITY OF ZEOLITES ON PLATINUM SUPPORTED CATALYSTS OF N-C6 AROMATIZATION, Applied catalysis. A, General, 112(2), 1994, pp. 105-115
L, Y zeolites were used as carrier to support Pt, and the catalytic pr
operties of the supported Pt catalysts in n-hexane aromatization were
investigated. The pore system of L zeolite proved to be beneficial for
Pt clusters, exhibiting a high benzene selectivity in n-hexane aromat
ization. The secondary pores of zeolite L had a negative influence on
the aromatization over Pt/BaKL. With these secondary pores blocked, th
e 0.4% Pt/BaKL-1 sample could keep up with the excellent aromatization
properties of 0.6% Pt/BaKL zeolite. Pt dispersed on KL basic zeolite
exhibited dehydrogenation activity in isopropanol decomposition. Pt su
pported on NH4L acidic zeolite enhanced the conversion of isopropanol
to form water and propene. IR results of linear CO adsorbed on Pt/L ze
olites suggested the Pt on NH4L acidic zeolite was ''electron deficien
t'', and Pt on KL basic zeolite exhibited some electron excess, which
results from the interaction of Pt and zeolites with different acidic-
basic properties.