An experimental assessment of Eucalyptus urosemente energy potential for biomass production in Brazil

Abstract Biomass is an interesting option as renewable energy source around the world. In this work, the Eucalyptus urosemente , a hybrid formed from the combination of Eucalyptus grandis x Eucalyptus citriodora , was energetically characterized considering the logs diameter and the number of days after cutting. The main objective of the present work is to define the best condition for its use as fuel in boilers. For the experimental evaluation of this new species, the samples were divided into fine or mixed, both with 1, 30 60, 90, 120, and 150 days after cutting. Following the Brazilian standard norms, were performed tests of moisture content, proximate analysis, and calorific values. Additionally, in some samples was applied the torrefaction thermal treatment. The results showed that the moisture content and the low heating value were influenced by the diameter and number of days after cutting. Furthermore, torrefied samples presented an increase of calorific values and hydrophobicity. Based on the low heating value, it was concluded that firewood should be consumed within a range of 90–120 days after cutting, avoiding the biodegradation process. Finally, the torrefaction method proved to be an attractive treatment to allow the surplus biomass commercialization and distribution.