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Olivas, A.; Zepeda, T.A.
Catalysis today, 05/2009, Letnik: 143, Številka: 1Journal Article, Conference Proceeding
The effect of the aluminum and titanium presence on the catalytic activity of the NiMo/SBA-15 and NiW/SBA-15 catalysts was evaluated in the hydrodesulfurization of dibenzothiophene and biphenyl hydrogenation. The samples were characterized by SP MAS 29Si NMR, S BET, XRD, chemisorption of H 2 and TPD-NH 3. The Ti-containing samples showed higher catalytic performance in both hydroprocessing reactions, in comparison with the Al-containing samples. The presence of Ti ions enhanced the dispersion of the supported active components, and the dispersion of the active species was related to the acidity of the supports. Finally, the W based catalysts showed higher activity in the hydroprocessing reactions than the traditional Mo based catalysts.
