Effect of the hydrogen spillover on the selectivity of dibenzothiophene hydrodesulfurization over CoS(x)/gamma-Al(2)O(3), NiS(x)/gamma-Al(2)O(3) and MoS(2)/gamma-Al(2)O(3) catalysts (Journal article)

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

Dibenzothiophene (DBT) hydrodesulphurization (HDS) reaction at 3 MPa and 325-375 degrees C on Mo/gamma-Al(2)O(3) single-bed and Me/gamma-Al(2)O(3)//SiO(2)//Mo/gamma-Al(2)O(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. (c) 2006 Elsevier B.V. All rights reserved.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών Υγείας. Τμήμα Ιατρικής
Keywords: spillover hydrogen,selectivity,hydrodesulfurization,dibenzothiophene,hydrotreating catalysts,remote-control,synergy,alkyldibenzothiophenes,aromatics,mechanism,kinetics,alumina,sulfide,sites
URI: https://olympias.lib.uoi.gr/jspui/handle/123456789/22160
ISSN: 1566-7367
Link: <Go to ISI>://000242793800027
http://ac.els-cdn.com/S1566736706001464/1-s2.0-S1566736706001464-main.pdf?_tid=ad77bf10b9ec0ee407586049cb88f992&acdnat=1332827659_08951348cc79c018638d35c44cc3189c
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