Energy Quality of Wood and Charcoal from the Stem and Root of Eucalyptus spp.

Abstract

This work aimed to evaluate the energy quality of wood and charcoal obtained from the stem and root of the genus Eucalyptus spp. From the wood, the physical, chemical and energetic properties were evaluated. For the charcoal produced in ovens of the carbonization furnaces model in the industry and produced in a muffle furnace, the physical, chemical and energetic properties were evaluated. Based on the analysis of technological properties, wood from the root has higher basic density (731.45 kg m -3 ) and lignin content (26.44%), however, the fixed carbon content and higher calorific value of the root (17.54% and 4547.75 kcal kg -1 ) were lower than for the stem wood (21.36% and 4730.82 kcal kg -1 ). It is recommended to use the wood from the root, both for direct burning and for the production of charcoal. The charcoal obtained in the industry, compared to that produced in muffle, presented higher energy quality.

Wood Density and Carbon Concentration Jointly Drive Wood Carbon Density of Five Rosaceae Tree Species

“…The lowest and highest values were given by Padus racemosa branchwood and Crataegus pinnatifida rootwood, respectively (Figure 2a). Our study and others [25] demonstrate the difference in WD among tree parts that vary with species. Reasons for WD variation are complex.…”

“…From root to branch, the CD tended to decrease, indicating that root wood has a higher C sequestration capacity than other parts of trees, except Malus baccata trees. The study of [25] found that the fixed carbon content of the root was lower than of the stem wood of the genus Eucalyptus spp. Without a doubt, this result improved our confidence in using four other Rosaceae species except Malus baccata to fix C in soil.…”

“…Silvicultural management leads to rapid growth, producing trees with high yields and relatively low-density wood [23]. Within a tree, WD usually increases from juvenile to mature wood in the radial direction and decreases from root to branch in the axial direction [24,25], but there are exceptions. Petrea et al [26] found that branches showed a higher WD than stems for European beech.…”