Banca de DEFESA: MARIA KELY ALVES GOMES DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARIA KELY ALVES GOMES DA SILVA
DATE: 01/06/2022
TIME: 14:00
LOCAL: Auditório da Direção da EAJ
TITLE:

ENERGY POTENTIAL OF WOOD FROM Eucalyptus CLONES IMPLANTED IN THE NEOTROPICAL SEMI-ARIDITY OF BRAZIL AND THEIR TECHNICAL PERFORMANCE AS A BIOFUEL

KEY WORDS:

energy forest, energy density, forest biomass, bioenergy.

PAGES: 46
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Tecnologia e Utilização de Produtos Florestais
SPECIALTY: Propriedades Fisico-Mecânicas da Madeira
SUMMARY:

The objective of this work was to investigate the bioenergetic potential of Eucalyptus wood under different density conditions and its technical performance as a fuel in the burning process of red ceramic products. Initially, five eucalyptus clones were selected in 06 different spacings (3 x 0.25; 3 x 0.5; 3 x 1.5; 3 x 3; 3 x 5 and 3 x 6.5), totaling 30 response variables. . The mortality of individuals was counted based on the database recorded in the inventories that took place every six months (2013 - 2019) and later, extrapolated by the planting density (ind.ha-1) to estimate the survival rate and volumetric production. Three sample trees were felled from each treatment and sent to determine the basic density, higher calorific value, ash content, volatile materials and fixed carbon and based on the data obtained, the stored energy per cubic meter (m3) and hectare was estimated. (there is). The material A1 was selected, due to its wide commercialization, for the firing process in a red ceramic industry, using the species Prosopis juliflora as a comparative factor. That said, for the technical evaluation in the burning, three treatments were adopted, with four replications: T1 - 100% P. juliflora, T2 - 100% Eucalyptus sp. and T3 - 50% of P. juliflora and E. sp. The wood used was previously organized in piles in the yard and its dimensions were measured to obtain its volume in stereo (st) and its solid volume was determined from the stacking factor promoted by a template (1m2) at the center of each pile. For each repetition, the number of times the oven was filled with firewood was recorded, the interval between supplies and, at the end of the firing, the percentage of first quality pieces, raw and broken. It was concluded that in situations where the planting was more dense, there were higher percentages of mortality. Higher wood basic density was found for clone R9 at 6.5 spacing and, in general, there was a positive correlation between the increase in wood basic density and wide spacings. The stored energy was superior in treatments with high population density that presented low mortality rates. Considering the final use of wood as an energy source, the C3 genetic material in the 3 x 0.25m spacing resulted in the highest bioenergetic potential of wood (1,010,310 kcal/ha) due to the high survival rate in a reduced spacing. . For the burning process, the average consumption of wood was higher in T1 (5.27 m3), followed by T3 (4.70 m3) and T2 (2.90 m3). Overall, in both treatments, the first quality pieces were above 90% (94.05%, 92.49% and 96.64%), followed by a low percentage of raw pieces (5.57%, 7 .07% and 3.06%) and broken parts (0.38%, 0.44% and 0.29%). The values found for raw pieces can be related to the temperature drops below 900°C, which occurred during the firing process, called “attention points”. It is concluded that there are no significant differences in the quality of the pieces, however there is a reduction in wood consumption of 10.82% in treatment T3 and of 44.93% in treatment T2 in relation to T1.

BANKING MEMBERS:
Interna - 1880266 - ROSIMEIRE CAVALCANTE DOS SANTOS
Externo ao Programa - 1300987 - CARLOS ALBERTO PASKOCIMAS
Externo ao Programa - 1678080 - GUALTER GUENTHER COSTA DA SILVA
Externo à Instituição - João Gabriel Missia da Silva