Effect of the sequence of impregnation on the activity and sulfur resistance of PtNi/-Al2O3 bimetallic catalysts for the selective hydrogenation of styrene

CAROLINA BETTI; JUAN M. BADANO; MARÍA JULIANA MACCARRONE; VANINA MAZZIERI; VERA CARLOS R.; MÓNICA E. QUIROGA

APPLIED CATALYSIS A-GENERAL

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2012 vol. 435 p. 181 - 186

0926-860X

a b s t r a c tThe influence of the preparation of bimetallic Pt?Ni catalysts on their activity and sulfur resistance during styrene semi-hydrogenation was studied. The preparation variables assessed were the sequence of impregnation and the kind of nickel precursor used. The catalysts were tested with the styrene hydrogenation reaction and further characterized by ICP, TPR, XPS and pyridine TPD.All catalysts showed high selectivities to ethylbenzene (>98%). The bimetallic catalysts were more active than monometallic Pt and the following activity order was found: Pt=NiClPt