Sulfur Resistance of Low-loaded Pt Catalysts

CAROLINA BETTI; JUAN M. BADANO; NICOLÁS CARRARA; CECILIA R. LEDERHOS; M. JULIANA MACCARRONE; LUCIANO PROFUMATI; CARLOS VERA; Á. MASTALIR; MÓNICA E. QUIROGA

Lyon

Congreso; XI EUROPACAT; 2013

In the petrochemical industry gasoline and BTX (Benzene, toluene and xylenes) streams coming from the cracking of petroleum cuts must be purified in order to minimize the concentration of olefins and diolefins. The widespread method of purification is the selective hydrogenation of vinyllic compounds, keeping the aromatic rings unaltered. The employed catalysts must have a great resistance to different sulfur compounds. In recent works our group has studied the effect of the precursor salt and the temperature of reduction on the activity and poison resistance of mono and bimetallic catalysts for the selective hydrogenation of styrene. The objective of this work is to extend this research to the reaction system of the bimetallic Pt-W/γ-alumina catalyst and the model feedstock of styrene contaminated with thiophene. The influence of the order of impregnation of bimetallic Pt?W catalysts on their activity and sulfur resistance during styrene semi-hydrogenation was studied.