When the catalyst was presented, the yield of hydrocarbons
increased, particularly in the case of soybean shell, which was four time higher than in the pyrolysis. The
bio-oil from soybean shell produced less coke (between 3.1 and 4.3%wt.) in its immediate catalytic
upgrading than that from pine sawdust (between 5 and 5.8%wt.), due to its lower content of phenolic and
other high molecular weight compounds (three and five times less, respectively). Moreover, soybean
shell showed a higher selectivity to hydrocarbons in the gasoline range, with more olefins and less aromatic
than pine sawdust.