Graphical abstract
Tri-glycerides (vegetable oil) are catalytic hydrotreated together with a heavy gas-oil. Different ratios vegetable oil/heavy gas-oil have been studied, showing the relative rate of decarboxylation, decarbonylation and dehydration hydrogenation and isomerization as a function of reaction conditions to give excellent diesel n-and i-alkanes. No influence of the vegetable oil on HDS of the heavy oil was observed.