Relationships between Heating Value and Lignin, Moisture, Ash and Extractive Contents of Biomass Fuels

Demırbas, Ayhan

doi:10.1260/014459802760170420

Cited by 230 publications

(147 citation statements)

References 10 publications

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“…Segundo Demirbas (2002), maiores teores de lignina contribuem com aumento do poder calorífico superior do combustível porque o PCS da lignina é maior que dos outros componentes primários da madeira. Stevens e Gardner (2010) verificaram que a adição de lignina em pó aumentava o poder calorífico dos pellets.…”

Section: Discussionunclassified

Influência Da Adição De Lignina Kraft Nas Propriedades De Pellets De Eucalipto

Pereira

Carneiro

Carvalho

et al. 2016

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ResumoOs pellets vêm se tornando uma importante fonte renovável de energia para utilização industrial e doméstica. O mercado consumidor está cada vez mais exigente quanto à qualidade do produto e essa pode ser melhorada por meio da utilização de diferentes aditivos, como a lignina kraft. Assim, o objetivo desse trabalho foi avaliar a qualidade dos pellets de eucalipto produzidos com adição de diferentes percentagens de lignina kraft. A matéria-prima utilizada para produção de pellets foi madeira com casca de um clone de Eucalyptus grandis x Eucalyptus urophylla com aproximadamente cinco anos de idade, proveniente de plantio comercial, além de 10% de resíduos da colheita do eucalipto (ponteira, folhas e galhos). Excluindo-se a testemunha (0% de lignina), adicionou-se 1, 2, 3, e 5% de lignina kraft, em relação à massa seca da matéria-prima. Os pellets foram produzidos em uma peletizadora laboratorial com matriz circular horizontal. Foram avaliadas as seguintes propriedades dos pellets: teor de umidade, poder calorífico superior e útil, densidade a granel e aparente, densidade energética, teor de cinzas, comprimento e diâmetro, dureza, durabilidade mecânica e teor de finos. A adição de lignina kraft em pellets de eucalipto contribuiu para a melhoria das propriedades físicas e mecânicas, no que se diz respeito à densidade, durabilidade mecânica, geração de finos e dureza. A adição de lignina ocasionou a elevação dos teores de cinzas e da umidade dos pellets. Conclui-se que a adição de lignina para produção de pellets é viável, desde que sejam utilizadas ligninas com menores teores de cinzas e umidade. Palavras-chave: Durabilidade mecânica; aditivo; combustível sólido; cinzas. AbstractInfluence of adding kraft lignin in eucalyptus pellets properties. The pellets are becoming an important renewable source of energy for industrial and domestic use. The consumer market is increasingly demanding in terms of product quality and this may be improved through the use of various additives, such as kraft lignin. The objective of this study was to evaluate the quality of eucalyptus pellets produced with the addition of different percentages of kraft lignin. The raw material used for production of pellets was wood with bark of an Eucalyptus grandis x E. urophylla clone, with approximately five years of age, obtained from commercial planting, and 10% of waste of eucalyptus harvest (tops, leaves and branches). Excluding the control (0% lignin) was added 1, 2, 3, and 5% kraft lignin, relative to the dry mass of raw material. The pellets were produced in a laboratory pelletizer with a horizontal circular array. The following properties of the pellets were evaluated: moisture content, gross and net calorific value, unit density, bulk density, energy density, ash content, length and diameter, hardness, mechanical durability and fines content. The addition of kraft lignin contributed to improving the pellets physical and mechanical properties, as regards the density, mechanical durability, fines and hardness. The addition of lignin cau...

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Section: Discussionunclassified

Influência Da Adição De Lignina Kraft Nas Propriedades De Pellets De Eucalipto

Pereira

Carneiro

Carvalho

et al. 2016

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“…Ash and extractive content are two important parameters directly affecting the heating value. High ash content of a plant part makes it less desirable as fuel, whereas high extractive content adds to its desirability (Demirbas, 2002c).…”

Section: Fuel Properties Of Biodiesel From Non-edible Vegetable Oilsmentioning

confidence: 99%

Biodiesel production from non-edible plant oils

Demırbas

Bafail

Ahmad

et al. 2016

Energy Exploration & Exploitation

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256

126

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Biodiesel is an alternative to petroleum-based fuels derived from a variety of feedstocks, including vegetable oils, animal fats, and waste cooking oil. At present, biodiesel is mainly produced from conventionally grown edible oils such as soybean, rapeseed, sunflower, and palm. The cost of biodiesel is the main obstacle to commercialization of the product. Biodiesel produced from edible oils is currently not economically feasible. On the other hand, extensive use of edible oils for biodiesel production may lead to food crisis. These problems can be solved by using lowcost feedstocks such as non-edible oils and waste cooking oils for biodiesel production. This paper reviews numerous options of non-edible oils as the substantial feedstocks, biodiesel processing, and effect of different parameters on production of biodiesel.

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“…As a counterpoint, higher concentrations of minerals and oxygen tend to reduce heating value (BRAND, 2010;DEMIRBAS, 2001DEMIRBAS, , 2004DINIZ et al, 2004;PROTÁSIO et al, 2011PROTÁSIO et al, , 2012REIS et al, 2012;VALE et al, 2000). According to Protásio et al (2011), an increase of 1% in the carbon and hydrogen content of fuels from plant biomass corresponds to an increase of 64.14 kcal/kg and 514.75 kcal/kg in higher heating value, indicating the huge importance of these elemental components when evaluating lignocellulosic materials.…”

Section: Descriptive Statisticsmentioning

confidence: 99%

Multivariate analysis applied to evaluation of Eucalyptus clones for bioenergy production

Couto

Protásio

Trugilho

et al. 2013

CERNE

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This research aimed to select Eucalyptus clones for bioenergy production by using of two multivariate techniques, principal component analysis and cluster analysis. The analysis evaluated 25 clones of Eucalyptus at age 54 months. Determinations included the concentrations of elemental components (C, H and O), lignin, total extractives and ash, as well as basic density, higher heating value and energy density. Both multivariate methods being used to evaluate and select clones of Eucalyptus for bioenergy production proved effective, there being similarities between the biomass groups formed by them. The cluster analysis revealed five distinct groupings, out of which cluster one, formed by clone U060, was found to have greater potential as a source of energy. Clones G084, G122, G023 and U108 had poorer energy performance.

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Relationships between Heating Value and Lignin, Moisture, Ash and Extractive Contents of Biomass Fuels

Cited by 230 publications

References 10 publications

Influência Da Adição De Lignina Kraft Nas Propriedades De Pellets De Eucalipto

Influência Da Adição De Lignina Kraft Nas Propriedades De Pellets De Eucalipto

Biodiesel production from non-edible plant oils

Multivariate analysis applied to evaluation of Eucalyptus clones for bioenergy production

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