Ma. Gutierrezortiz et al., SURFACE-FEATURES AND CATALYTIC PERFORMANCE OF PLATINUM ALUMINA CATALYSTS IN SLURRY-PHASE HYDROGENATION, Industrial & engineering chemistry research, 32(11), 1993, pp. 2457-2463
Several platinum catalysts supported on three commercial gamma-alumina
s were prepared by impregnation and anionic exchange using aqueous sol
utions of H2PtCl6. A number of methods were used to characterize the p
recursors as well as the final catalysts, including TGA, TPR, and hydr
ogen chemisorption at 298 K. TPR measurements showed two reduction pea
ks for the catalysts: the first one corresponding to reduction of the
metal precursor to platinum and the second one associated to formation
of a surface complex, Pt-Al2O3-x, with partial reduction of the suppo
rt. The activity of the different catalysts was tested in the slurry-p
hase hydrogenation of benzene. The results obtained in the activity me
asurements have been correlated to the characteristics of the catalyst
s.