Graduated in Forest Engineering from Federal University of Viçosa (1984), master's degree (1987) and PhD (1995) in Forest Science from Federal University of Viçosa and postdoctoral degree in Forest Engineering from Federal University of Paraná (2005). Currently is a Full Professor at Federal University of Lavras in Lavras/MG. I have experience in Wood Science and Technology, Forest Resources and Forest Engineering, with emphasis on Biomass Energy, Wood Quality, Wood Physical and Chemical Properties, specifically working on issues related to Wood and Charcoal Quality, Pyrolysis and Thermal Degradation of Lignocellulosic Materials, Growth stress, Wood Sampling and Non-Destructive Evaluation Techniques. Phone: 55 35 3829 1415 Address: DCF-UFLA - Caixa Postal 3037 37200-000 - Lavras/MG - Brasil
The aim of this experiment was to evaluate the energy stored in the various wastes of the sawing ... more The aim of this experiment was to evaluate the energy stored in the various wastes of the sawing of Eucalyptus grandis logs. Ten logs of Eucalyptus grandis were used. The logs were cut from 15-year-old trees, taken from an area of the Federal University of Lavras. The logs were sawed with a simple band saw and then the planks were re-sawed with a circular saw. The waste has been classified as slabs, shavings, sawdust and bark. The energy stored in the waste was determined by superior calorific value (SCV) and then converted into kWh. The volume of waste generated represented 56% of the volume of logs. The energy stored in a composite of slabs and shavings and in the sawdust were not statistically different and showed a SCV of 4,735 kcal.kg -1 . The energy stored in the bark was significantly statistically lower and showed a SCV of 3833 kcal.kg -1 .
Among the numerous biomass sources possible to be used for energy purposes, lignocellulosic resid... more Among the numerous biomass sources possible to be used for energy purposes, lignocellulosic residues of coffee plantations are highlighted. Therefore, the objective of this study was to evaluate the potential of waste processing of coffee beans in pellet production for the generation of thermal energy, and classify them regarding marketability, using Standard DIN EN 14961-6. The pellets were produced considering the following composition (based on weight): 100% coffee hulls; 100% silver skin; 50% coffee hulls and 50% silver skin; 70% coffee hulls and 30% eucalyptus sawdust and 70% silver skin and 30% eucalyptus sawdust. Fresh biomass moisture was quantified, as well as bulk density and energy densities. For the pellets, physical and energetic properties (moisture, unit density, bulk density, heating values and energy densities) were evaluated, as well as chemical properties (volatile materials, ash and fixed carbon) and mechanical properties (resistance to diametral compression, fines content and durability). Waste processing of coffee beans can be transformed into granulated solid biofuels for the generation of heat energy. Coffee hull pellets, silver skin, coffee hulls with silver film and coffee hulls with wood can be marketed and exported to the European Union, following the requirements of Standard DIN EN 14961-6.
Coffee has a prominent position in Brazilian economy, especially in southern Minas Gerais, the ma... more Coffee has a prominent position in Brazilian economy, especially in southern Minas Gerais, the main producing state. Despite extensive research involving coffee plantations, there is a lack in literature concerning wood and charcoal from Coffea arabica. There are currently 5.6 billion coffee trees in a 2.3 million hectare area, generating residues, such as fruit bark and wood, which have potential as renewable fuels. Thus, the objective of this study was to evaluate the energetic potential of wood and charcoal from Coffea arabica in three cropping systems (organic, natural agroforestry and conventional) and two cultivars (Catuai and Mundo Novo), by elemental chemical analysis. Carbonizations were carried out in an electric ove (muffle) with a final temperature of 450°C. The bioenergy use of wood from Coffea arabica, as well as of the charcoal from this plant, proved satisfactory based on inferences made from the elemental chemical composition of these fuels. In general, cultivation systems and cultivars little influenced the levels of carbon, hydrogen, oxygen and sulfur of wood and charcoal, as well as the ratios N/C, H/C and O/C.
Coffee has a prominent position in Brazilian economy, especially in southern Minas Gerais, the ma... more Coffee has a prominent position in Brazilian economy, especially in southern Minas Gerais, the main producing state. Despite extensive research involving coffee plantations, there is a lack in literature concerning wood and charcoal from Coffea arabica. There are currently 5.6 billion coffee trees in a 2.3 million hectare area, generating residues, such as fruit bark and wood, which have potential as renewable fuels. Thus, the objective of this study was to evaluate the energetic potential of wood and charcoal from Coffea arabica in three cropping systems (organic, natural agroforestry and conventional) and two cultivars (Catuaí and Mundo Novo), by elemental chemical analysis. Carbonizations were carried out in an electric ove (muffle) with a final temperature of 450°C. The bioenergy use of wood from Coffea arabica, as well as of the charcoal from this plant, proved satisfactory based on inferences made from the elemental chemical composition of these fuels. In general, cultivation ...
Na presente pesquisa, objetivou-se avaliar os rendimentos gravimétricos da carbonização e as cara... more Na presente pesquisa, objetivou-se avaliar os rendimentos gravimétricos da carbonização e as características qualitativas do carvão vegetal de clones de híbridos obtidos dos cruzamentos de espécies de Corymbia, e identificar os mais adequados para uso siderúrgico. Seis clones, aos 6 anos e 5 meses de idade, foram utilizados na pesquisa e amostradas cinco árvores de cada material genético. As carbonizações laboratoriais foram realizadas à temperatura final de 450°C, taxa de aquecimento de 100°C.h-1 e tempo de residência de 30 minutos. Os rendimentos gravimétricos da carbonização foram determinados em relação à madeira seca. O carvão produzido foi qualificado, considerando-se a análise química imediata, poder calorífico superior, densidade energética, consumo específico de madeira e a eficiência energética. Na avaliação do experimento, foi utilizado o delineamento inteiramente casualizado com cinco repetições (árvores). A análise multivariada de componentes principais foi empregada pa...
How to cite Complete issue More information about this article Journal's homepage in redalyc... more How to cite Complete issue More information about this article Journal's homepage in redalyc.org Scientific Information System
The aim of this experiment was to evaluate the energy stored in the various wastes of the sawing ... more The aim of this experiment was to evaluate the energy stored in the various wastes of the sawing of Eucalyptus grandis logs. Ten logs of Eucalyptus grandis were used. The logs were cut from 15-year-old trees, taken from an area of the Federal University of Lavras. The logs were sawed with a simple band saw and then the planks were re-sawed with a circular saw. The waste has been classified as slabs, shavings, sawdust and bark. The energy stored in the waste was determined by superior calorific value (SCV) and then converted into kWh. The volume of waste generated represented 56% of the volume of logs. The energy stored in a composite of slabs and shavings and in the sawdust were not statistically different and showed a SCV of 4,735 kcal.kg -1 . The energy stored in the bark was significantly statistically lower and showed a SCV of 3833 kcal.kg -1 .
Among the numerous biomass sources possible to be used for energy purposes, lignocellulosic resid... more Among the numerous biomass sources possible to be used for energy purposes, lignocellulosic residues of coffee plantations are highlighted. Therefore, the objective of this study was to evaluate the potential of waste processing of coffee beans in pellet production for the generation of thermal energy, and classify them regarding marketability, using Standard DIN EN 14961-6. The pellets were produced considering the following composition (based on weight): 100% coffee hulls; 100% silver skin; 50% coffee hulls and 50% silver skin; 70% coffee hulls and 30% eucalyptus sawdust and 70% silver skin and 30% eucalyptus sawdust. Fresh biomass moisture was quantified, as well as bulk density and energy densities. For the pellets, physical and energetic properties (moisture, unit density, bulk density, heating values and energy densities) were evaluated, as well as chemical properties (volatile materials, ash and fixed carbon) and mechanical properties (resistance to diametral compression, fines content and durability). Waste processing of coffee beans can be transformed into granulated solid biofuels for the generation of heat energy. Coffee hull pellets, silver skin, coffee hulls with silver film and coffee hulls with wood can be marketed and exported to the European Union, following the requirements of Standard DIN EN 14961-6.
Coffee has a prominent position in Brazilian economy, especially in southern Minas Gerais, the ma... more Coffee has a prominent position in Brazilian economy, especially in southern Minas Gerais, the main producing state. Despite extensive research involving coffee plantations, there is a lack in literature concerning wood and charcoal from Coffea arabica. There are currently 5.6 billion coffee trees in a 2.3 million hectare area, generating residues, such as fruit bark and wood, which have potential as renewable fuels. Thus, the objective of this study was to evaluate the energetic potential of wood and charcoal from Coffea arabica in three cropping systems (organic, natural agroforestry and conventional) and two cultivars (Catuai and Mundo Novo), by elemental chemical analysis. Carbonizations were carried out in an electric ove (muffle) with a final temperature of 450°C. The bioenergy use of wood from Coffea arabica, as well as of the charcoal from this plant, proved satisfactory based on inferences made from the elemental chemical composition of these fuels. In general, cultivation systems and cultivars little influenced the levels of carbon, hydrogen, oxygen and sulfur of wood and charcoal, as well as the ratios N/C, H/C and O/C.
Coffee has a prominent position in Brazilian economy, especially in southern Minas Gerais, the ma... more Coffee has a prominent position in Brazilian economy, especially in southern Minas Gerais, the main producing state. Despite extensive research involving coffee plantations, there is a lack in literature concerning wood and charcoal from Coffea arabica. There are currently 5.6 billion coffee trees in a 2.3 million hectare area, generating residues, such as fruit bark and wood, which have potential as renewable fuels. Thus, the objective of this study was to evaluate the energetic potential of wood and charcoal from Coffea arabica in three cropping systems (organic, natural agroforestry and conventional) and two cultivars (Catuaí and Mundo Novo), by elemental chemical analysis. Carbonizations were carried out in an electric ove (muffle) with a final temperature of 450°C. The bioenergy use of wood from Coffea arabica, as well as of the charcoal from this plant, proved satisfactory based on inferences made from the elemental chemical composition of these fuels. In general, cultivation ...
Na presente pesquisa, objetivou-se avaliar os rendimentos gravimétricos da carbonização e as cara... more Na presente pesquisa, objetivou-se avaliar os rendimentos gravimétricos da carbonização e as características qualitativas do carvão vegetal de clones de híbridos obtidos dos cruzamentos de espécies de Corymbia, e identificar os mais adequados para uso siderúrgico. Seis clones, aos 6 anos e 5 meses de idade, foram utilizados na pesquisa e amostradas cinco árvores de cada material genético. As carbonizações laboratoriais foram realizadas à temperatura final de 450°C, taxa de aquecimento de 100°C.h-1 e tempo de residência de 30 minutos. Os rendimentos gravimétricos da carbonização foram determinados em relação à madeira seca. O carvão produzido foi qualificado, considerando-se a análise química imediata, poder calorífico superior, densidade energética, consumo específico de madeira e a eficiência energética. Na avaliação do experimento, foi utilizado o delineamento inteiramente casualizado com cinco repetições (árvores). A análise multivariada de componentes principais foi empregada pa...
How to cite Complete issue More information about this article Journal's homepage in redalyc... more How to cite Complete issue More information about this article Journal's homepage in redalyc.org Scientific Information System
In air drying of Eucalyptus urophylla and Corymbia citriodora logs for the production of charcoal... more In air drying of Eucalyptus urophylla and Corymbia citriodora logs for the production of charcoal it is necessary to be able to predict when logs have reached the required moisture content of ≤ 35%. This study is aimed to produce models using basic density and diameter to predict the moisture content of Eucalyptus urophylla and Corymbia citriodora logs after 30, 60 and 90 days drying. 1,2 m long logs were taken at three different heights from three C. citriodora trees and three trees each from two E. urophylla clones (VM4 and Mn463). The 27 debarked, end sealed logs were air dried under cover for 90 days during which the change in moisture content was monitored. The relationship between density and drying was analyzed by Pearson's correlation coefficient and the models for predicting the moisture content based on the basic density and diameter were produced. The density and the drying showed a high correlation coefficient. The coefficient of determination of the models was above 0,89 with a standard error lower than 6%. The use of the density and diameter to estimate the wood moisture content simplifies the production of the models, which can be used for Eucalyptus and Corymbia genetic materials.
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