Abstract

Two different series of platinum supported catalysts have been prepared, characterized and tested in the toluene hydrogenation. In each series, the metal loading was constant (1 wt% Pt) and two metal precursors, H 2PtCl 6 and Pt(acac) 2 have been used. Various supports (Al 2O 3, SiO 2, ZrO 2 and TiO 2) differing in surface areas and chemical properties were used. The catalysts were characterized by means of H 2 chemisorption, TPR, surface acidity by TPD of ammonia and XPS. In order to evaluate the catalyst performance the resistance to deactivation by sulphur poisoning was also investigated. Thus, toluene hydrogenation was studied by cofeeding 10ppm thiophene while n-butane hydrogenolysis was investigated over poisoned catalysts. © 1997 Elsevier Science B.V.