Under the renewable energy context,
sugarcane biomass pyrolysis has been growing as a convenient route to produce
bio-oil, which can be set into the chemical industry and refineries as building
blocks or combustion fuel. In this work sugarcane straw was submitted to direct
pyrolysis in a fluidized bed pilot plant at 500°C, in presence of air.
Sugarcane in natura was also
pyrolysed as a model for comparison, in order to determine the viability of
processing different sources of raw biomass. The physicochemical
characterization of the biomass precursors as well as of the bio-oils was also
carried out, which points both biomass feedstocks as suitable for bio-oil
production in terms of viscosity, surface tension, density and acidity. The
bio-oil obtained from sugarcane in natura presented higher carbon and hydrogen content as well as lower oxygen content.
On the other hand, the metal content is higher in the bio-oil obtained from
sugarcane straw, in
special the iron and potassium contents were 807 ppm and 123 ppm against 27 ppm
and 1 ppm in the bio-oil from sugarcane in
natura. Aliphatic and aromatic compounds as well as carbohydrates scaffolds
were identified as the main components of the bio-oil. GC-MS analyses showed
aromatic products from lignine fragmentation and free sugars and sugar
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