Efeito da relação siringil/guaiacil e de fenóis derivados da lignina nas características da madeira e do carvão vegetal de Eucalyptus spp

Araújo, Ana Clara Caxito de; Trugilho, Paulo Fernando; Napoli, Alfredo; Braga, Pedro Paulo de Carvalho; Lima, Rafaeli Valério de; Protásio, Thiago de Paula

doi:10.18671/scifor.v44n110.13

Cited by 12 publications

(11 citation statements)

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“…Em estudo termogravimétrico com 7 clones de Eucalyptus ssp., foi observada máxima massa residual aos 450 ºC de 23% (base massa seca) (Araújo et al, 2016), valor inferior ao apresentado pela madeira do caneleiro, nas mesmas condições de pirólise (27,89%). O perfil termogravimétrico do lenho de C. macrophyllum também apresentou maior resistência à decomposição térmica do que àquela verificada para Schizolobium amazonicum (Vidaurre et al, 2012) e Eucalyptus spp.…”

Section: Discussionunclassified

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Propriedades energéticas da madeira e do carvão vegetal de Cenostigma macrophyllum: subsídios ao uso sustentável

et al. 2018

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Resumo -O objetivo deste estudo foi avaliar a qualidade da madeira de Cenostigma macrophyllum Tul para uso energético e determinar os rendimentos e propriedades do carvão vegetal produzido em diferentes temperaturas de carbonização. Foram retirados discos de 3 cm de espessura nas posições basal, 25%, 50%, 75% e 100% da altura comercial do fuste. Os discos foram cortados em cunhas e metade destas foi utilizada para análises na madeira e a outra metade foi carbonizada em temperaturas finais de 400 ºC, 500 ºC e 600 ºC para avaliação dos rendimentos e características do biorredutor. A densidade básica (1,2 g cm -3), teor de lignina (34%), poder calorífico superior (4.845 cal g -1 ) e rendimento gravimétrico de carbonização (RGC) aos 400 ºC (41,5%) da madeira do caneleiro se destacaram. O aumento da temperatura de pirólise da madeira de 400 ºC para 600 ºC resultou em acréscimo de 29,4% do teor de carbono fixo e redução de 19% e 63,4%, respectivamente, do RGC e do teor de materiais voláteis do carvão vegetal. Conclui-se que a espécie apresentou valores satisfatórios para produção energética. Wood and charcoal energy properties of Cenostigma macrophyllum: subsidies to sustainable useAbstract -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 carbon content and a reduction of 19% and 63.4%, respectively, in charcoal GYC and volatile matter content. In general, the species presented satisfactory energy production.

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“…O elevado conteúdo de lignina e a qualidade desta macromolécula podem contribuir para maiores rendimentos durante a pirólise (Pereira et al, 2013b;Araújo et al, 2016). O teor de extrativos solúveis em etanol da madeira também representa uma característica importante para a decomposição térmica do lenho.…”

Section: Introductionunclassified

Propriedades energéticas da madeira e do carvão vegetal de Cenostigma macrophyllum: subsídios ao uso sustentável

et al. 2018

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“…The thermogravimetric analysis (TGA) accompanies the of the sample as a function of time, it being possible to determine the temperature when the thermal degradation starts and when it is most intense. Also provide the amount of residue is produced at a certain temperature, being of this important tool when you want to select species for energy purposes (Carneiro et al, 2013;Araújo et al, 2016;Azizi et al, 2017;Martinez et al, 2018;Fernandez et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Thermal Profile of Wood Species From the Brazilian Semi-Arid Region Submitted to Pyrolysis

Júnior

Andrade

Protásio

et al. 2019

CERNE

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Thermal profile of wood species from the brazilian semi-arid region submitted to pyrolysis. CERNE, v. 25, n. 1, p. 44-53, 2019. HIGHLIGHTS We analyzed native and endangered species of the Brazilian semi-arid region. The thermal profile of the species was questioned for energy generation. Mimosa tenuiflora and Poincianella pyramidalis were the most suitable wood species for sustainable charcoal production. The energy characteristics will allow the efficient management of the species in mixed plantations for this purpose.

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“…In addition to productivity, the differences in chemical, physical and morphological wood composition should also be considered for charcoal production, as they can affect the characteristics of the final product (Trugilho & Silva, 2001). The variability of charcoal characteristics, such as lignin content and its sirigil/guaiacyl relation, basic density, diameter of the piece used in the carbonisation process and initial humidity, modify charcoal quality and yield (Soares et al, 2014;Costa et al, 2014;Soares et al, 2015;Araújo et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Influence of Wood Physical Properties on Charcoal from Eucalyptus spp.

2018

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The use of wood in the form of charcoal for energy production, has great economic importance in Brazil. In this context, the study of variables and mechanisms that affect charcoal quality is essential. The present study aimed to verify the influence of some physical properties of Eucalyptus wood on the quality and yield of the produced bioreducer. We used three commercial Eucalyptus clones, cultivated for use in the steel industry, determining wood density and shrinkage, density and immediate chemistry of the charcoal produced and the charcoal gravimetric yield. The data was submitted to Pearson's correlation analysis. Correlations between wood density and apparent charcoal density as well as charcoal ash content were observed. All clones presented characteristics suitable for the production of charcoal for the steel industry, with emphasis on the hybrid E. urophylla x E. grandis.

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Efeito da relação siringil/guaiacil e de fenóis derivados da lignina nas características da madeira e do carvão vegetal de Eucalyptus spp

Cited by 12 publications

References 11 publications

Propriedades energéticas da madeira e do carvão vegetal de Cenostigma macrophyllum: subsídios ao uso sustentável

Propriedades energéticas da madeira e do carvão vegetal de Cenostigma macrophyllum: subsídios ao uso sustentável

Thermal Profile of Wood Species From the Brazilian Semi-Arid Region Submitted to Pyrolysis

Influence of Wood Physical Properties on Charcoal from Eucalyptus spp.

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