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One‐Pot Sol–Gel Preparation for Efficient Cobalt–Molybdenum–Titania Hydrotreating Catalysts
Author(s) -
Nguyen D. L.,
Gillot S.,
Souza D. O.,
Blanchard P.,
Lamonier C.,
Berrier E.,
Kotbagi T. V.,
Dongare M. K.,
Umbarkar S. B.,
Cristol S.,
Payen E.,
Lancelot C.
Publication year - 2012
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201200165
Subject(s) - hydrodesulfurization , cobalt , catalysis , molybdenum , thiophene , inorganic chemistry , titanium , materials science , cobalt sulfide , chemistry , organic chemistry , electrochemistry , metallurgy , electrode
Titania‐based hydrodesulfurization catalysts were prepared by using a one‐pot sol–gel method with the titanium peroxo complex as titanium precursor and molybdenum and cobalt precursors dissolved in the aqueous hydrogen peroxide solution used during synthesis. Catalysts with MoO 3 loadings varying from 5 to 40 wt % and a Co/Mo atomic ratio of 0.5 were prepared. Solids with molybdenum loadings below 20 wt % MoO 3 demonstrated poor hydrodesulfurization activity for the model compound thiophene. This was attributed to the presence of a large amount of embedded cobalt and molybdenum species in the titania matrix. A significant increase in the catalytic activity was observed for solids containing 20 and 25 wt % of MoO 3 on which active species appeared to be accessible on the titania surface. Furthermore, the highest conversion obtained on these sol–gel solids was superior to the highest conversion obtained on reference catalysts prepared through the impregnation of ammonium heptamolybdate and cobalt nitrate on commercial titania.