Abstract
In this work, rice husk, an agricultural waste in Brazil, was characterized and converted into bio-oi l via fast pyrolysis process (high heating rates in an inert a tmosphere) carried out on a batch reactor. The effe cts of temperature and particle size of rice husk were evaluated on the yi eld of liquid, solid and gaseous products. The orga nic and aqueous phases of the brute bio-oil were separated by liquid-liqui d extraction. The results showed that at 130 oC, th e drying time of 90 min was enough to remove the moisture from rice husk. The particle size analysis showed that the predomina nt size of rice husk is in the range of 1,4< Φ<3,3 mm. It was observed that smaller particle size affect positively on the liquid yield. The maximum liquid yield (bio-oil + water) was approximately 40%, obtained at the temperature of 575 °C. T he brute bio-oil was separated in an aqueous fraction (~17%) and organic fraction (~83%) and, the acidity seem on the a queous fraction
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