49 documents found, page 1 of 5
Potential of Texture Analysis for Charcoal Classification
Andrade,Bruno Geike de; Vital,Benedito Rocha; Carneiro,Angélica de Cássia Oliveira; Basso,Vanessa Maria; Pinto,Francisco de Assis de CarvalhoAbstract Charcoal produced from reforested wood can be distinguished from the charcoal derived from the wood of native species. This identification is very important for the trade, control and monitoring of charcoal production in Brazil. This study investigated the potential of texture analysis for classifying the charcoal based on origin (eucalyptus or native) and species. A total of 17 wood species were studi...
INFLUENCE OF TIME AND HEAT TREATMENT TEMPERATURE ON PERMEABILITY OF Eucalyptus ...
Freitas,Fabiana Paiva de; Carvalho,Ana Márcia Macedo Ladeira; Carneiro,Angélica de Cássia Oliveira; Vital,Benedito Rocha; Gonçalves,Lira Maria SivieiroABSTRACT Due to the fact that raw timber has permeability characteristics unsuitable for some applications, several processing techniques have been developed, such as hydrothermal treatments and freezing, which aim to improve these properties. The objective of this study was to analyze the effects of treatment temperature and duration on the permeability of Eucalyptus grandis wood. Heartwood samples from three ...
PROPERTIES OF PARTICLEBOARD PANELS MADE OF SUGARCANE PARTICLES WITH AND WITHOUT...
Milagres,Emerson Gomes; Barbosa,Raiana Augusta Grandal Savino; Caiafa,Karine Fernandes; Gomes,Gabriel Soares Lopes; Castro,Tatiana Aurora CondezoABSTRACT The objective of this work was to determine the properties of particleboard panels made of “in natura” sugarcane bagasse particles, heated at 250 °C for 5 minutes. Various particle proportions were utilized to produce the panels and their properties were compared with that of a panel made of Pinus sp. The panels were produced with 8% tannin formaldehyde adhesive, and 0.5% paraffin emulsion, being press...
PHYSICAL AND MECHANICAL PROPERTIES OF JUVENILE Schizolobium amazonicum WOOD
Vidaurre,Graziela Baptista; Vital,Benedito Rocha; Oliveira,Angélica de Cássia; Oliveira,José Tarcísio da Silva; Moulin,Jordão CabralABSTRACT Growth in world demand for wood implies a search for new fast growing species with silvicultural potential, and in this scenario for native species such as Paricá . Thus, the objective of this study was determining the physical and mechanical wood properties of the Schizolobium amazonicum species (known as Paricá in Brazil). Trees were collected from commercial plantations located in the north of Brazi...
ANATOMICAL AND CHEMICAL PROPERTIES OF JUVENILE Schizolobium amazonicum WOOD
Vidaurre,Graziela Baptista; Vital,Benedito Rocha; Colodette,Jorge Luiz; Oliveira,Angélica de Cássia; Silva,João Gabriel Missia da; Moulin,Jordão CabralABSTRACT The objective of this study was to determine the effects of tree age and of pith-bark and base-top positions on anatomical characteristics, and the effect of age on the chemical components of Schizolobium amazonicum (Paricá wood). The material was obtained from commercial plantations in the states of Maranhão and Pará with ages of 5, 7, 9 and 11 years. The first three logs (2.7 m length each) were obta...
SAMPLING METHODS AND NUMBER OF ROUNDWOODS FOR DETERMINING THE MOISTURE CONTENT
Donato,Danilo Barros; Castro,Renato Vinícius Oliveira; Carneiro,Angélica de Cássia Oliveira; Carvalho,Ana Márcia Macedo Ladeira; Vital,Benedito RochaABSTRACT This study had the objective of comparing two methodologies of sampling, Simple Random Sampling (ACS) and Stratified Random Sampling (ACE) to determine the optimum number of roundwood samples to obtain the moisture content of the population. In order to achieve this goal, different percentages of allowable error (5,10,15 and 20%) were considered for each sampling methodology. In the conduction of this ...
EUCALYPTUS LOGS DRYING AT HIGH TEMPERATURES1
Oliveira,Aylson Costa; Pereira,Bárbara Luísa Corradi; Carneiro,Angélica de Cássia Oliveira; Fialho,Lucas de Freitas; Figueiró,Clarissa GusmãoABSTRACT The objective of this work was to evaluate the drying speed of Eucalyptus urophylla logs in high temperatures and the influence of the presence or absence of bark and also the diameter of the log in the drying rate. Eucalyptus logs 60 cm long were divided into three diameter classes: 8-12 cm; 12,1-16 cm and 16,1-20 cm. The logs were dried in a heater with forced air circulation, in the presence or abse...
ESTIMATES OF MASS AND ENERGY OF DIFFERENT GENETIC MATERIAL EUCALYPTUS
Magalhães,Mateus Alves de; Carneiro,Angélica de Cássia Oliveira; Vital,Benedito Rocha; Silva,Carlos Miguel Simões da; Souza,Marina Moura deABSTRACT The use of forest biomass or its derived charcoal as firewood can generate environmental and economic advantages for the Brazilian energy matrix. In this context, the main objective was to evaluate the energy potential of certain eucalyptus genetic materials, which are used by the charcoal production sector. We have evaluated six materials of Eucalyptus ssp. at the age of seven years from commercial pl...
ENERGY PROPERTIES OF WOOD PARTICLES TORREFIED AT DIFFERENT TEMPERATURES
Silva,Carlos Miguel Simões da; Vital,Benedito Rocha; Carneiro,Angélica de Cassia Oliveira; Oliveira,Aylson Costa; Araújo,Solange OliveiraABSTRACT The objective of this study was to evaluate the effect of the final torrefaction temperature on the energy properties of wood. It was applied four treatments with three replicates, consisting of untreated wood particles and particles torrefied at temperatures of 170, 220 and 260ºC. Better physical, chemical and thermal properties of the particles were observed as a function of the torrefaction temperat...
INFLUÊNCIA DAS PROPRIEDADES QUÍMICAS E DA RELAÇÃO SIRINGIL/GUAIACIL DA MADEIRA ...
Santos,Rosimeire Cavalcante dos; Carneiro,Angélica de Cássia Oliveira; Vital,Benedito Rocha; Castro,Renato Vinícius Oliveira; Vidaurre,Graziela BaptistaRESUMO O trabalho teve como objetivo determinar a influência das propriedades químicas (composição elementar, teores de extrativos totais, lignina total e holocelulose) e relação siringil/guaiacil, da madeira de diferentes materiais genéticos de eucalipto na produção de carvão vegetal. Utilizaram-se na pesquisa quatro clones híbridos de Eucalyptus, aos 7 anos de idade, sendo 6 árvores por clone, totalizando 24 ...