An FT-IR spectroscopic study of carbonyl functionalities in bio-oils

Publication year: 2011
Source: Fuel, In Press, Uncorrected Proof, Available online 14 June 2011

Caroline, Lievens , Daniel, Mourant , Min, He , Richard, Gunawan , Xiang, Li , …

Pyrolysis bio-oil contains abundant O-containing structures. Carbonyls are particularly important not only because they are abundant and exist in many forms (e.g. as acids, esters, ketones and aldehydes) but also because they are reactive and are a key consideration of bio-oil upgrading. This study aims to investigate the distribution of carbonyl groups in a variety of bio-oil samples prepared from the pyrolysis of mallee wood, bark and leaves in a fluidised-bed reactor. Some bio-oil samples also underwent esterification reactions with methanol in the presence of solid Amberlyst acid catalyst. The bio-oil samples were diluted with isopropanol prior to the acquisition…

 Highlights: ► Investigation of carbonyl groups in bio-oil with FTIR spectroscopy. ► Concentrations of carbonyl groups in bio-oils vary with biomass feedstock. ► Different esterification reactivities for carbonyl groups in light and heavy bio-oil fractions.