The influence of the kind of support (Al 2 O 3, SiO 2, and TiO 2 ) on the catalytic activity and selectivity of Ru–Sn–B catalysts for the hydrogenation of methyl oleate to oleyl alcohol was studied. The results show that the most active and selective catalyst for producing oleyl alcohol is Ru(1%)–Sn(2%)–B/Al 2 O 3 . This was attributed to the catalyst having a favorable surface Sn/Ru ratio (∼2). The SiO 2 -supported Ru–Sn–B catalyst had a good activity and hydrogenated both C═C double bonds and the C═O group, thus producing stearyl alcohol with a high yield. It however deactivated, to a great extent, its final conversion being lower than that of the bimetallic catalysts supported on Al 2 O 3 and TiO 2 . The TiO 2 -supported catalyst had a high selectivity to saturated methyl esters because it hydrogenated C═C double bonds but had little activity for hydrogenation of the C═O group.
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Sánchez et al. (2015) studied this question.
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