Characterization and Upgrading of a Bio-Oil Produced by Pyrolysis of Biomass

Abstract

This paper presents the results obtained in the caracterizazation of a pyrolytic oil with a high nitrogen content. The oil was separated in fractions by liquis chromatography. The first two fraction contain hydrocarbons and monophenols respectively. Most of the relevant compounds have been identified in both fractions. Nitrogen is mainly contained in compounds constituting the las fraction. The upgrading was done by treatment under high pressure of hydrogen with sulfided supported nickel-molibdemun and cobalt-molibdenum. Both catalysts were active in the transformation but NiMo gave higher yields inHDN and HDO. The upgrading was facilitated by the presence of hydrogen domor compounds such as pure tetralin on a fraction of hydrotreated oil.