Effect of the hydrogen spillover on the selectivity of dibenzothiophene hydrodesulfurization over CoS x/?-Al 2O 3, NiS x/?-Al 2O 3 and MoS 2/?-Al 2O 3 catalysts

Escalona, N.; García R; Lagos, G; Navarrete C.; Baeza, P; Gil-Llambias F.J.

Keywords: sulfur, hydrogen, alumina, catalysts, selectivity, spillover, hydrodesulfurization, dibenzothiophene, compounds, (Hso)


Dibenzothiophene (DBT) hydrodesulphurization (HDS) reaction at 3 MPa and 325-375 °C on Mo/?-Al 2O 3 single-bed and Me/?-Al 2O 3//SiO 2//Mo/?-Al 2O 3 (Me = Co or Ni) double-bed catalysts were investigated. Results indicate that ratio cyclohexylbenzene (CHB)/biphenyl (BP) or selectivity is higher when using double-beds rather than a single-bed. Synergy in dibenzothiophene hydrodesulphurization on Co//Mo and Ni//Mo double-beds is also detected. Changes in selectivity and conversion are attributed to the action of spillover hydrogen (Hso) formed in the first bed that reaches the second bed. © 2006 Elsevier B.V. All rights reserved.

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Volumen: 7
Número: 12
Editorial: Elsevier
Fecha de publicación: 2006
Página de inicio: 1053
Página final: 1056
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-33750047848&partnerID=q2rCbXpz