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• W2125673230 abstract "The influence of the W/Ni ratio and the phosphorous content as a promoter in the catalytic performance of NiW sulfide supported on zirconium containing mesoporous silica in the hydroconversion of tetralin has been studied. Three catalysts with a W loading of 20 wt.% and Ni loading of 2.5, 5 and 7.5 wt.% were prepared. To study the effect of phosphorous as promoter, prior to the metallic impregnation, 0.5, 1.5, 3.0 and 5.0 wt.% of P2O5 was incorporated to the support. The catalysts were sulfided with a H2/H2S mixture at 400 °C for 2 h, and finally tested in the hydrogenation (HYD)/ring-opening of tetralin at 6.0 MPa (4.5 MPa H2 and 1.5 MPa N2). Using IR and XP spectroscopies, a correlation has been established between the catalytic performance and the dispersion and type of compounds formed on the support. The formation of a highly dispersed NiWO4 phase, easily sulfidable, and the high acidity of mild strength of the catalysts, could explain the good catalytic performance observed. The catalyst with 5 wt.% of Ni, 20 wt.% of W and 0.5 wt.% of P2O5 shows an excellent catalytic performance and is higher than that observed with a sulfided commercial Ni-Mo/Al2O3, in the same experimental conditions." @default.
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• W2125673230 date "2004-05-01" @default.
• W2125673230 modified "2023-10-18" @default.
• W2125673230 title "Superficial characterization and hydroconversion of tetralin over NiW sulfide catalysts supported on zirconium doped mesoporous silica" @default.
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• W2125673230 doi "https://doi.org/10.1016/j.apcata.2003.11.015" @default.
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