Portal de Periódicos da CAPES

Hydrogenation of tetralin over mixed PtMo supported on zirconium doped mesoporous silica: Use of polynuclear organometallic precursors

2006; Elsevier BV; Volume: 252; Issue: 1-2 Linguagem: Inglês

10.1016/j.molcata.2006.02.028

1873-314X

M. Carmen Carrión, Blanca R. Manzano, Félix A. Jalón, Pedro Maireles‐Torres, Enrique Rodríguez‐Castellón, Antonio Jiménez‐López,

Catalysis for Biomass Conversion

New mixed PtMo catalysts supported on Zr-doped mesoporous silica have been prepared by using a polynuclear organometallic complex as precursor of the active phase, and tested in the catalytic hydrogenation of tetralin at high hydrogen pressure. The PtMo catalysts have been characterized by XRD, TEM, XPS, N2 sorption at 77 K, H2-TPR and NH3-TPD. In order to evaluate the influence of the precursor, a PtMo catalyst has been also prepared from inorganic monometallic salts. The PtMo catalysts were very active in the hydrogenation of tetralin, showing conversion values close to 100%, and high selectivity toward the hydrogenation products (trans- and cis-decalins). The trans- to cis-decalin ratio varies depending on the type of precursor used. The formation of hydrogenolysis, isomerization and cracking products depends on the acidity of the catalysts, although the selectivity towards these products is always lower than 8.5%. On the other hand, all the studied catalysts showed a poor thiotolerance against the presence of dibenzothiophene in the feed.