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| Registros recuperados: 587 | |
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| Araújo, Ana Clara Caxito de; Costa, Luciano Junqueira; Braga, Pedro Paulo de Carvalho; Neto, Rosalvo Maciel Guimarães; Rocha, Maria Fernanda Vieira; Trugilho, Paulo Fernando. |
| This study aimed to evaluate the quality Cenostigma macrophyllum Tul wood for energetic use and to determine the yields and charcoal properties produced at different carbonization temperatures. Discs with 3 cm of thickness were obtained from stem basal positions, 25%, 50%, 75% and 100% of commercial height. The discs were split in two parts. One was used to determine wood properties and the other was carbonized at final temperatures of 400 ºC, 500 ºC and 600 ºC for bio-reducer evaluation . Basic density (1.2 g cm-3), lignin content (34%), higher calorific value (4,845 cal g-1) and gravimetric yield in charcoal (GYC) at 400 ºC (41.5%) were the highlights. The increase of wood pyrolysis temperature from 400 ºC to 600 ºC resulted in 29.4% increase in fixed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbonization temperature; Gravimetric yield; Thermogravimetry Energia de Biomassa Florestal; Química da madeira. Temperatura de carbonização; Rendimento gravimétrico; Termogravimetria. |
| Ano: 2018 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1546 |
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| Protásio, Thiago de Paula; Goulart, Selma Lopes; Neves, Thiago Andrade; Trugilho, Paulo Fernando; Ramalho, Fernanda Maria Guedes; Queiroz, Lívia Mara Rodrigues de Souza Brites. |
| The objective of this study was to evaluate the wood and charcoal quality of young Eucalyptus spp. trees, and to verify the influence of age and clone on the energy performance of these fuels. It was sampled the clones 1277 and 0321 of Eucalyptus spp. in two ages (46 and 58 months). The characteristics determined in the wood were: chemical molecular and elementary, basic density, carbon stocks and lignin by volume, the energy density and heating values (higher and lower). The charcoal was produced in an electric furnace (muffle) with the final temperature of 450 °C. It was conducted the mass balance and carbonization energy, beyond the immediate evaluation of the chemical composition, apparent density and calorific value of charcoal. The clone 1277, at the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus spp.; Biomass energy; Carbonization; Combustion Recursos Florestais; Engenharia Florestal; Energia da Biomassa Florestal Eucalyptus spp.; Energia de biomassa; Carbonização; Combustão. |
| Ano: 2014 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/657 |
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| Reis, Aliny Aparecida dos; Protásio, Thiago de Paula; Melo, Isabel Cristina Nogueira Alves de; Trugilho, Paulo Fernando; Carneiro, Angélica de Cássia Oliveira. |
| This work aimed to evaluate the effect of planting sites on the elemental chemical composition of Eucalyptus urophylla wood and the quality of its charcoal and to verify the statistical relations among the properties measured in wood and charcoal. It was used twelve 7-years old trees from E. urophylla clone from Curvelo, Itacambira and Turmalina counties located in Minas Gerais State, Brazil. The elemental chemical composition (C, H, N, S and O) of the wood and C/H and C/N relations were determined. The wood was carbonized in a laboratorial muffle furnace. It was determinate the gravimetric yields in charcoal, in pyroligneous extract and, by difference, the non-condensable gases. The apparent relative density, the higher heating value, the proximate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Iron industry Clone Correlations Biofuel Recursos Florestais; Engenharia Florestal; Energia da Biomassa Siderurgia Clone Correlações Biocombustível. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/363 |
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| Gallio, Ezequiel; Zanatta, Paula; Ribes, Débora Duarte; Beltrame, Rafael; Gatto, Darci Alberto. |
| The objective of this work was to evaluate hygroscopicity modification of Eucalyptus dunnii, E. saligna and Corymbia maculata wood due to termites attack. Using samples measuring 20 x 20 x 150 mm³ (tangential x radial x longitudinal) the equilibrium moisture content (MCE), linear contractions of the tangential and radial planes (βT e βR), contraction anisotropy (CAβ), water absorption (AA) and water absorption rate (TAA) of healthy and deteriorated wood by Nasutitermes termites were evaluated. It was verified that the termite attack caused increase in TUE and reduction in βT. However, βR and CAβ presented different behaviors, varying among the different species. AA and TAA presented higher water absorption intensity in the first hours of immersion, being... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Shrinkage; Wood quality Recursos Florestais; Engenharia Florestal Eucalipto; Retratibilidade; Qualidade da madeira. |
| Ano: 2018 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1528 |
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| Martins, Emerson Gonçalves; Sturion, José Alfredo; Neves, Edinelson Jsosé Maciel. |
| A provenance/progenies trial of grevílea (Grevillea robusta Cunn.) was established in the Ponta Grossa region, state of Paraná, Brazil. The purpose was to identify genetically superior individuals in order to assure good material for future seed orchard. The genetic matherial was based on 60 half-sib progenies from eighteen Australian provenances and one control. Progenies were evaluated in randomized blocks with seven replications, five plants per plot and spacing of 3 m x 3 m (9 m2 per plant). Significant gains were estimated through selection of the 200 best trees (23,33%), for cilindric volume, at 10 years age, based on genetic values, aiming to establish a seedling seed orchard; or selecting the best twenty trees (33,33%), towards a clonal seed orchard. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seed orchard; Progenies Pomar de sementes; Procedência; Progênies. |
| Ano: 2004 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1594 |
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| Talgatti, Maiara; Baldin, Talita; Silveira, Amanda Grassmann da; Santini, Elio José; Vidrano, Bibiana Regina Argenta. |
| This study aimed to evaluate physical and mechanical properties of wood-plastic composites using materials of low processing level. Residues from carpentry as wood shavings from three forest species (Pinus elliottii, Hovenia dulcis and Maclura tinctoria), and thermoplastic type were used. Data were submitted to Duncan’s test with 95% confidence. In relation to the modulus of rupture (MOR) and elasticity- (MOE), all treatments presented successful results, without difference. For the tests of internal bond and screw pullout, the results were not satisfactory. For this last test, the best result was for Hovenia dulcis. In relation to swelling in 2 h and 24 h, all treatments presented positive results. In general, the results were not influenced by the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wood residues; Scanning microscopy; Thermoplastic Recursos Florestais Resíduos de madeira; Micrografia de varredura; Termoplástico. |
| Ano: 2017 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1385 |
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| Fritzsons, Elenice; Carpanezzi, Antonio Aparecido; Wrege, Marcos Silveira; Aguiar, Ananda Virgínia de. |
| A grevílea (Grevillea robusta A. Cunn) é uma espécie arbórea originária da Austrália e foi introduzida no Brasil no final do século 19. Novas progênies foram importadas e testadas pela Embrapa Florestas desde a década de 1990. Apesar do grande interesse em seu plantio no Paraná, até o momento, não há um zoneamento climático ou edafoclimático para a espécie. Foram definidos critérios restritivos e favoráveis ao cultivo da grevílea para o Estado do Paraná: temperatura média anual e temperatura média anual do mês de julho. As áreas mais indicadas para o plantio comercial situam-se no norte, noroeste, oeste e sudoeste, áreas mais quentes do estado. As áreas não recomendadas correspondem às do Planalto de Palmas e Guarapuava e do entorno, bem como de União da... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zoneamento; Grevílea; Zoneamento climático; Paraná. Grevillea; Zoning; Climatic zoning; Parana State.. |
| Ano: 2010 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/109 |
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| Registros recuperados: 587 | |
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