Produção de biomassa para geração de energia em povoamentos de Pinus taeda L. com diferentes idades

Brand, Martha Andréia; Stähelin, Thielly Schmidt Furtado; Ferreira, Juliana Ceccato; Neves, Márcio Daian

doi:10.1590/s0100-67622014000200016

Cited by 25 publications

(21 citation statements)

References 4 publications

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“…Importante destacar que briquetas confeccionadas con 100 % de bagazo de caña de azúcar presentaron rajaduras profundas, causadas por la compresión del pistón de la máquina compactadora, a una temperatura de compactación de 80 ± 2 ºC y presión de 140 kgf cm -², lo que inviabiliza la evaluación de los pará-metros físicos y químicos. Técnicamente mayor densidad aparente es importante, una vez que existe una relación directa entre el aumento de la densidad aparente y la densidad energética de la briqueta, además que proporciona mayor resistencia mecánica, volviéndose briquetas más integras al transporte o posibles caídas (Brand et al 2014).…”

Section: Discussionunclassified

Producción de briquetas con residuos de cáscara de piñón manso (Jatropha curcas) y bagazo de caña de azúcar

et al. 2017

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Section: Discussionunclassified

Producción de briquetas con residuos de cáscara de piñón manso (Jatropha curcas) y bagazo de caña de azúcar

et al. 2017

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“…Biogas is produced whenever biodigestible material is available (vinasse and unfermented juices). Estimates of biogas production are based on Moraes et al …”

Section: Methodsmentioning

confidence: 99%

“…Considering that the International Energy Agency Task 47 (working group on energy from biogas) worst scenario is a leakage of 5.5% 25 and that IPCC uses a default value of 5%, the default of 5% was used (Tier 1). 26 When the own process emits GHG, as is the case of hydrogenation in jet fuel production and of biopropylene metathesis, the emission factors considered are based on literature (additional information presented in Appendix S1D. Table 2 presents the emission factors considered.…”

Section: Ghg Emission Factorsmentioning

confidence: 99%

The potential of a bioeconomy to reduce Brazilian GHG emissions towards 2030: a CGE‐based life cycle analysis

Machado

Cunha

Faaij

et al. 2019

Biofuels Bioprod Bioref

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Brazil is one of the largest emitters of greenhouse gases in the world with most of its emissions coming from the land use, land use change, and forestry (LULUCF) sector. New commitments have been set by the Paris Agreement and are reflected in the country's Nationally Determined Contribution (NDC). The Brazilian NDC has three main pillars to reduce emissions: increasing the share of biomass in the total primary energy supply to 18%, reducing deforestation, and achieving 45% of renewable energy in the energy mix. It is important to enlarge the share of biomass in the Brazilian economy, but it is also important to assess the potential impacts on deforestation in order to set the right strategy eventually. This study is thus an effort to investigate the contributions of a biobased economy to reduce Brazilian emissions, considering the broader concept of the bioeconomy, using biomass for energy, chemicals, and materials. To satisfy the objectives of the project, especially those related to its interest in economy‐wide changes in feedstock (from fossil to biobased), computable general equilibrium modeling (CGE) was chosen as the basic methodology integrated with an economic input–output life cycle analysis (EIO‐LCA). Results show that the impacts of the bioeconomy scenarios are positive but not sufficiently high to reduce the estimated emissions drastically. Emissions by the energy sector produce the highest reductions (7.5%) but the 12% increase in the LULUCF sector offsets those reduction. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd

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“…A emissão de gases foi realizada a cada 5 minutos no período de uma hora, totalizando a queima da biomassa. Os dados foram submetidos à análise de variância e as médias comparadas pelo teste de Tukey a 5% de probabilidade, com auxílio do programa ASSISTAT versão 7.7 beta (Silva e Azevedo, 2009 (Brand et al, 2014b).…”

Section: Metodologiaunclassified

Análise do processo de co-combustão da biomassa, através da influência da umidade do cavaco na emissão de contaminantes atmosféricos, eficiência energética e geração de cinzas (Analysis of the biomass co-combustion process, through the influence of ...)

Campos

Rosa²,

Borga³

2017

Rev. Bras. Geog. Fis.

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A poluição ambiental e atmosférica decorre de uma junção de fatores, como o crescimento e as concentrações populacionais e industriais. As caldeiras são equipamentos destinados à produção de vapor sob pressão superior à atmosférica, que utiliza a biomassa como fonte geradora de energia, emitindo uma quantidade significativa de contaminantes atmosféricos. Sabendo que o maior impacto ambiental produzido pelas caldeiras é a emissão de gases, materiais particulados e a geração de hidrocarbonetos, objetivou-se quantificar a variação de emissão de gases poluentes (CO2, CO, O2), eficiência de queima e geração de cinzas em função da umidade do combustível na empresa Adami S/A. O estudo foi realizado in loco em uma caldeira aquatubular, onde se analisou a emissão dos gases durante a queima da biomassa (Cavaco de Pinus sp.) com 52%, 40%, 30% e 25% de umidade. A partir das análises identificou-se que alta emissão de gás contaminante se dá devido principalmente pela umidade do combustível entre outros fatores. Apesar de as emissões que foram medidas na caldeira da empresa Adami S/A estarem todas dentro dos parâmetros legais, deve-se tentar reduzir a quantidade de monóxido de carbono emitido, devido ao seu impacto no meio ambiente. Assim, esse trabalho visa apresentar a interação da umidade da biomassa de Pinus sp. com a emissão de gases poluentes, pois são poucos os estudos relacionando a queima de biomassa com a emissão de gases. A B S T R A C TEnvironmental and atmospheric pollution stems from a combination of factors such as population and industrial growth and concentrations. Boilers are equipment for the production of steam under pressure above atmospheric, which uses biomass as a steam source, emitting a significant amount of atmospheric contaminants. Knowing that the greatest environmental impact produced by the boilers is the emission of gases, particulates and the generation of hydrocarbons, the objective was to quantify the emission of pollutant gases (CO2, CO, O2), burning efficiency and ash generation in Function of the fuel in the company Adami S/A. The study was carried out in loco in an aquatubular boiler, where the emission of the gases during the burning of the biomass (Cavaco de Pinus sp.) with 52%, 40%, 30% and 25% of humidity was analyzed. From the analyzes it was identified that high emission of contaminating gas is mainly due to the humidity of the fuel among other factors. Although the emissions that were measured in the boiler of the Adami S/A company are all within the legal parameters, one should try to reduce the amount of carbon monoxide emitted due to its impact on the environment. Thus, this work aims to present the interaction of the biomass moisture of Pinus sp. with the emission of pollutant gases, since few studies relate the burning of biomass with the emission of gases. Keywords: boiler. biomass. air pollution. gaseous pollutants. air quality.

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Produção de biomassa para geração de energia em povoamentos de Pinus taeda L. com diferentes idades

Cited by 25 publications

References 4 publications

Producción de briquetas con residuos de cáscara de piñón manso (Jatropha curcas) y bagazo de caña de azúcar

Producción de briquetas con residuos de cáscara de piñón manso (Jatropha curcas) y bagazo de caña de azúcar

The potential of a bioeconomy to reduce Brazilian GHG emissions towards 2030: a CGE‐based life cycle analysis

Análise do processo de co-combustão da biomassa, através da influência da umidade do cavaco na emissão de contaminantes atmosféricos, eficiência energética e geração de cinzas (Analysis of the biomass co-combustion process, through the influence of ...)

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