Resumo

MONTESINOS-CASTELLANOS, A. et al. Industrial alumina as a support of MoP: catalytic activity in the hydrodesulfurization of dibenzothiophene. Rev. Mex. Ing. Quím [online]. 2012, vol.11, n.1, pp.105-120. ISSN 1665-2738.

Alumina support with a high surface area was used to prepare alumina-supported MoP catalysts, varying the Mo and P loadings from 4% wt. to 53%wt. Mo and P were loaded with an atomic ratio of Mo:P=1. The presence of different phosphate species was detected on all calalysts by NMR and electron diffraction techniques. The A1PO₄ phase was identified for highly loaded MoP catalysts (> 26 wt% of theoretical MoP). The catalytic materials were tested in hydrodesulfurization (HDS) of Dibenzothiophene (DBT) under high temperature (5935 K )and pressure (5.5 MPa ) conditions and the highest activity for HDS of DBT was obtained with the catalyst containing Mo 9.9 wt% (13% wt of theoretical MoP) keeping an atomic ratio P/Mo=l. A structural model is proposed considering the Mo and P loading. The catalyst with the best activity showed high surface area (>200 m²/g).

Palavras-chave : alumina; hydrodesulfurization; dibenzothiophene; phosphide; phosphate.