- Thermochemical Biomass Conversion Processes
- Agricultural and Food Sciences
- Lignin and Wood Chemistry
- Natural Fiber Reinforced Composites
- Forest Biomass Utilization and Management
- Biofuel production and bioconversion
- Thermal and Kinetic Analysis
- Iron and Steelmaking Processes
- Wood Treatment and Properties
- Bamboo properties and applications
- Energy and Environment Impacts
- Environmental Impact and Sustainability
- Food Chemistry and Fat Analysis
- Sensory Analysis and Statistical Methods
- Geography and Environmental Studies
- Forest ecology and management
- Photovoltaic Systems and Sustainability
- Zeolite Catalysis and Synthesis
- Recycling and Waste Management Techniques
- Non-Destructive Testing Techniques
- Growth and nutrition in plants
- Material Properties and Processing
- Sustainable Supply Chain Management
- Botanical Research and Applications
- Fatigue and fracture mechanics
Universidade Federal de Viçosa
2016-2022
Centro de Tecnologias Estratégicas do Nordeste
2018
O objetivo deste trabalho foi avaliar o efeito do material genético e local de plantio na qualidade da madeira eucalipto, proveniente sistemas curta rotação, para fins energéticos, assim como analisar a correlação existente entre as propriedades madeira. Avaliou-se cinco clones Eucalyptus spp. provenientes três munícipios estado Minas Gerais, sendo mensurados os seguintes parâmetros madeira: Os teores extrativos, ligninas holoceluloses, densidade básica poder calorífico superior. As...
The charcoal production when performed in woods with high moisture content negatively impacts the pyrolysis and causes an increase of greenhouse emissions. aim this study was to investigate effects on quality for pig iron industry. slow Eucalyptus sp. carried out four different wood moistures, 0, 20, 40 60% (dry base). gas yield decreased according moisture. On other hand, bio-oil friability increased along content. proximate analysis, bulk density higher heating value were not influenced by...
Pyrolysis is a promising technology for thermal conversion of lignocellulosic biomasses into higher added value fuel. The aim this study was to analyze the potential four agroforestry produce energy as raw material or bio-coal. In study, slow pyrolysis conducted in three final temperatures evaluate bio-coal production widely available Brazil. used were sugarcane bagasse (Saccharum sp.), bamboo (Dendrocalamus giganteus), straw bean (Phaseolus vulgaris) and eucalypts wood chips (Eucalyptus...
ABSTRACT 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, main objective was to evaluate potential certain eucalyptus genetic materials, which are used by production sector. We have evaluated six materials Eucalyptus ssp. at age seven years from commercial plantations, spaced 3 x 3m, grown in Alto Vale do Jequitinhonha, Minas Gerais. Based on data, average annual increment...
O objetivo do presente estudo foi avaliar o efeito material genético e local de plantio no carvão vegetal produzido com madeira eucalipto proveniente sistemas curta rotação. Foram avaliados cinco clones Eucalyptus sp. provenientes três munícipios estado Minas Gerais. carbonizadas amostras cavacos em forno elétrico tipo mufla, taxa aquecimento 1,67ºC/min os seguintes parâmetros resultante: Rendimento vegetal, composição química imediata (carbono fixo, materiais voláteis cinzas), densidade...
Brazilian productivity of eucalyptus trees is one the highest in world, and it has sustainable viable conditions to supply demand for woody biomass a large quantity diversity. This favorable situation makes Brazil countries with greatest potential production development torrefied on commercial scale. Torrefaction mild pyrolysis applied increase energy quality feedstock. The aim this study was evaluate torrefaction purposes. An experimental performed evaluating thermal treatment wood chips...
The genus Corymbia appears as an option to produce best quality charcoal. selection of genotypes through multivariate analysis can be a solution when multiple variables influence the result. aim this study was characterize eight citriodora x torelliana for energy and charcoal production, group indicate genetic materials with highest potential. woods specific gravity, high heating value density determined. Energy grouped by Scott-Knott test; 1 appointed generation. wood carbonized. Charcoal...
ABSTRACT The objective of this work was to evaluate the drying speed Eucalyptus urophylla logs in high temperatures and influence presence or absence bark also diameter log rate. 60 cm long were divided into three classes: 8-12 cm; 12,1-16 16,1-20 cm. dried a heater with forced air circulation, five temperatures: 50, 75, 100, 125 150ºC. mass initial moisture determined from each water loss kept up periodic weightings, closing process when reached 20% moisture. rate calculated using ratio...
O presente estudo foi realizado com o objetivo de avaliar a degradação térmica da madeira e liberação gases condensáveis não em sua carbonização. Utilizou-se Eucalyptus spp. aproximadamente 7 anos idade, proveniente um teste clonal uma empresa florestal, localizado Divinésia, MG. Foram realizadas análise termogravimétrica (TG/DTG) carbonizações mufla fim determinar comportamento térmico fator emissão dos (CO, CO2, CH4, H2, licor pirolenhoso). Instalou-se experimento se descrever as médias...
Brazil is a large producer of sawmill wastes, commonly used to supply boilers and produce energy. In order reduce unwanted characteristics the material, thermochemical conversions through carbonization an alternative. The aim this study characterize energetic proprieties raw biomass pyrolyzed residues. analyze environmental impact in emission pyrolysis gases, behavior gases during thermic treatment was determined. Eucalyptus sp. Pinus residues slow performed electric kiln, whose were...
cm³ e 50 cm³.
The aim of the study was to evaluate technical and economic viability a wood dryer in charcoal production. Drying carried out for 72 hours using from Eucalyptus sp. two classes diameter. average admission temperature combustion gases 100-150ºC. It determined mass water withdrawn by drying estimated amount that would be consumed during pyrolysis remove same water, being this converted into mass. In analysis were indicators net present value, internal rate return discounted payback. presented...
Objetivou-se analisar a arborização viária do bairro de Ramos, da cidade Viçosa-MG.Foram levantados 121 indivíduos, pertencentes 18 espécies diferentes.O total família encontrada foi 13, com apenas um indivíduo morto.Da totalidade amostradas, 65% foram exóticas.O local estudo apresentou 6,5 km calçadas, índice plena ocupação 167 arvores/Km.O em encontra-se pouco arborizado, 11% apresentando déficit aproximadamente 148 arvores/Km.Quando analisado as condições altura dos classes (< 5 m) e (5 <...
Parâmetros colorimétricos podem ser uma importante ferramenta para predizer a qualidade de produtos torrificados e auxiliar no controle da torrefação. Considerando importância do processo torrefação produto torrificado, o presente trabalho teve por objetivo correlacionar ajustar modelos entre parâmetros propriedades energéticas pellets pinus em um reator tipo rosca sem fim. Foram produzidos logo seguida submetidos à nas temperaturas 210, 250 290 °C nos tempos residência 10, 20 30 minutos....
A maior parte das resinas utilizadas na produção de painéis reconstituídos é sintetizada a partir compostos orgânicos advindos do petróleo que, além não renováveis e relativamente caros, ainda apresentam riscos à saúde. O objetivo trabalho foi produzir caracterizar fenol-formaldeído com adição lignina Kraft folhosas para confecção compensados. obtida por meio da precipitação licor negro proveniente processo polpação industrial madeira eucalipto. Os compensados foram fabricados resina (FF),...
This study aimed to evaluate the static bending strength (fM) and modulus of elasticity (MOE) values Eucalyptus grandis samples produced in different dimensions. It intended identify that present similar mechanical properties those recommended by other technical standards obtained according NBR 7190. The were made agreement with dimensions following standards: IPT, AFNOR B51-016, ASTM D143, CEN-EN 408, COPANT 555, was significantly reduced increase sample MOE influenced size showing a...
propriedades do carvão vegetal e, assim, classificar clones gênero Corymbia e Eucalyptus quanto ao rendimento qualidade da produção de carvão.
Biomass residues play a fundamental role in the transition process for renewable energetic matrix.Biomass thermal treatment processes, e.g.slow pyrolysis, could supply products with high density and increased value.The aim of this study was to evaluate pyrolysis three biomass obtained from agriculture (sugarcane bagasse bean straw) forestry cultures (eucalypts).The focus qualify quantify gaseous non-condensable fractions, according final temperature (400, 550 700 °C).The thermogravimetric...