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Springer (part of Springer Nature), Catalysis Letters, 3(144), p. 460-468

DOI: 10.1007/s10562-013-1173-5

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Increase of the Ni/W Ratio in Heteropolyanions Based NiW Hydrocracking Catalysts with Improved Catalytic Performances

Journal article published in 2013 by K. Ben Tayeb, Karima Ben Tayeb ORCID, Carole Lamonier ORCID, Christine Lancelot, Michel Fournier, Audrey Bonduelle-Skrzypczak, Fabrice Bertoncini
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

In the present work, we investigated the influence of the increase ofNi/W ratio by the addition of nickel nitrate on heteropolycompound (HPC) based catalysts. Synthesized catalysts were characterized by Raman, XPS and HRTEM techniques and were examined in the model reaction of toluene hydrogenation. The Ni 2 SiW 12 O 40 based catalyst with a ratio of 0.36 obtained by addition of nickel nitrate was found to have the best catalytic activity compared to the most efficient of the HPC based catalysts with a stoichiometric Ni/W ratio of 0.36. Raman spectroscopy showed that the SiW 12 O 40 4- HPA was decomposed during the drying step in SiW 11 O 39 8- species.