Effect of the hydrogen spillover on the selectivity of dibenzothiophene hydrodesulfurization over CoSx/γ-Al2O3, NiSx/γ-Al2O3 and MoS2/γ-Al2O3 catalysts |
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| Authors: | N Escalona R García G Lagos C Navarrete P Baeza FJ Gil-Llambías |
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| Affiliation: | aUniversidad de Concepción, Facultad de Ciencias Químicas, Casilla 160c, Concepción, Chile;bUniversidad de Santiago de Chile, Casilla 40, Correo 33, Santiago, Chile |
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| Abstract: | Dibenzothiophene (DBT) hydrodesulphurization (HDS) reaction at 3 MPa and 325–375 °C on Mo/γ-Al2O3 single-bed and Me/γ-Al2O3//SiO2//Mo/γ-Al2O3 (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. |
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| Keywords: | Spillover hydrogen Selectivity Hydrodesulfurization Dibenzothiophene |
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