The overall reaction trend is also in good agreement with the work of other authors like Huber et al. [29]. Catalytic activity of the noble metals followed the order Pd > Pt > Ru.
The Pd catalyst produced the highest concentration of n-alkanes (86%) followed by Pt(41%) and Ru yielded the least concentration of 39%. Similarly, the soybean oil conversions were 92, 51 and 40% for Pd, Pt and Ru
catalysts, respectively. Low activityofRuunder these conditionswas attributed to carbonaceous depositions due to cracking reactions as also reported previously [30,31].
Species such as cyclic and isomerized alkanes and aromatics, that are associated with good flow properties at low temperature, were not detected with all the materials, suggesting the HDO and HDC as the main reaction pathways.
The overall reaction trend is also in good agreement with the work of other authors like Huber et al. [29]. Catalytic activity of the noble metals followed the order Pd > Pt > Ru. The Pd catalyst produced the highest concentration of n-alkanes (86%) followed by Pt(41%) and Ru yielded the least concentration of 39%. Similarly, the soybean oil conversions were 92, 51 and 40% for Pd, Pt and Rucatalysts, respectively. Low activityofRuunder these conditionswas attributed to carbonaceous depositions due to cracking reactions as also reported previously [30,31]. Species such as cyclic and isomerized alkanes and aromatics, that are associated with good flow properties at low temperature, were not detected with all the materials, suggesting the HDO and HDC as the main reaction pathways.
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