Abstract
The objective of this work was to determine the quality of the Eucalyptus urophilla x Eucalyptus grandis clone charcoal, defining the basic density and wood retractability, apparent density, breaking index, charcoal yield, condensable and non-condensable gas yield, AQI and calorific values, comparing the results of different trunk positions and in two different heating ramps, ramp 1 (R1) with a heating rate of 1.25 ºC/min, final temperature of 450ºC and total of 6 hours, and ramp 2 (R2) with a heating rate of 1.19 ºC/min, final temperature of 500ºC and total time of 7 hours. The six evaluated trees were from a six-year-old cloned tree plantation located in the municipality of Gurupi, in the south of Tocantins state. The specimens for the characterizations were made from wooden discs removed from three trunk positions (base, DBH, top). The Eucalyptus urograndis wood presented basic density considered average (0.47 g/cm³) and good dimensional stability. The charcoal presented an expected yield and high calorific value influenced by the final temperature of the heating ramps, high fixed carbon content, acceptable ash content, as well as a low breaking rate. The results were satisfactory and identified the species as a good energy source.
Highlights
Wood is used for a variety of purposes, including energy uses
Basic wood density is considered an index for wood quality assessment, being one of the most relevant indicators to be evaluated among the various physical properties, as it can affect the others, especially the energy properties since wood density directly interferes with the charcoal density, its yield and quality
The retractibility of E. urograndis wood showed values which characterize the wood as more stable when compared to other Eucalyptus species
Summary
Wood is used for a variety of purposes, including energy uses. Data from the Food and Agriculture Organization (FAO) of the United Nations (2017) point to wood as the most important source of renewable energy, accounting for about 6% of the global supply of primary energy. Biomass in Brazil is largely made up of wood and when energy production is evaluated, it can be said that its use is divided into charcoal production (carbonization) and direct consumption of firewood (combustion) (Vale et al, 2002). Charcoal is only a fraction of the products that can be obtained in the carbonization process. If appropriate collection systems are used, condensable and non-condensable gases can be obtained. Pyroligneous liquor, which is a condensable gas, can be used for energy as well as for several different purposes such as fertilizer, disinfectant, sterilizer, and as a food additive, among others
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
