The calculation of the chemical exergies of coal-based fuels by using the higher heating values

Bilgen, Selçuk; Kaygusuz, Kami̇l

doi:10.1016/j.apenergy.2008.02.001

Cited by 90 publications

(48 citation statements)

References 13 publications

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“…In addition to evaluating the energetic capacity of renewable fuels, it is also important to consider S and N contents if environmental aspects are taken into account (Kumar et al 2010;Bilgen and Kaygusuz 2008). The differences among biomass wastes and the content of such components are related to soil nutrient balance, soil temperature, water stress, and type of soil.…”

Section: Physical and Chemical Characterization Of Lignocellulosic Wamentioning

confidence: 99%

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Brazilian Lignocellulosic Wastes for Bioenergy Production: Characterization and Comparison with Fossil Fuels

et al. 2013

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The aim of this paper was to analyze energy-related properties of forestry and agricultural wastes for energy production purposes, and to compare them with fossil fuels. The forestry wastes used were red cedar, Eucalyptus, and Pinus wood shavings. The agricultural wastes analyzed were rice husk, coffee wastes, sugar cane bagasse, maize harvesting wastes, and bamboo cellulose pulp. The forestry wastes presented more suitable properties for bioenergy production than the agricultural wastes. Desirable energetic properties were found for coffee wastes. The opposite was verified for rice husks. Among the biomass studied, coffee wastes presented the highest equivalent in fossil fuel volume and hence may lead to the highest decrease in CO 2 emissions by fossil fuels used in Brazil for steam and heat production. The results suggests that CO 2 benefits can be obtained if bioenergy is generated in the same locale where biomass is produced, avoiding CO 2 cost of logistics and leading to greater end-use efficiency. The present work promotes the widespread use of different lignocellulosic wastes for bioenergy production and gives useful information for the planning and the control of power plants using biomass.

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Section: Physical and Chemical Characterization Of Lignocellulosic Wamentioning

confidence: 99%

“…The release of S to the atmosphere may cause acid rain and environmental degradation (Bilgen and Kaygusuz 2008). However, it has been reported that SO 2 emissions are negligible in biomass fuels (García et al 2012).…”

Section: Physical and Chemical Characterization Of Lignocellulosic Wamentioning

confidence: 99%

Brazilian Lignocellulosic Wastes for Bioenergy Production: Characterization and Comparison with Fossil Fuels

et al. 2013

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“…A alta proporção entre oxigênio e hidrogênio diminui o valor energético do material combustível (NORDIN, 1994). Além disso, é desejável que a biomassa apresente baixos teores de nitrogênio e enxofre, pois estes resultam em poluição ambiental (BILGEN; KAYGUSUZ, 2008;KUMAR et al, 2010).…”

Section: Protásio T P Et Alunclassified

Correlações canônicas entre as características químicas e energéticas de resíduos lignocelulósicos

Protásio

Tonoli

Júnior

et al. 2012

CERNE

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RESUMO:A análise de correlação canônica é um procedimento estatístico multivariado que permite verificar as correlações lineares existentes entre dois grupos ou conjuntos de variáveis (X e Y). No presente trabalho, objetivou-se realizar a análise de correlação canônica para verificar as associações existentes entre o grupo formado pelos teores de lignina, extrativos totais e o poder calorífico superior (PCS) de resíduos lignocelulósicos com o grupo formado pelos teores de seus componentes elementares (carbono, hidrogênio, nitrogênio e enxofre). Foram utilizados oito resíduos lignocelulósicos: maravalhas de eucalipto, pinus e cedro australiano; bagaço de cana; polpa celulósica residual de bambu; casca e pergaminho de café; resíduos da colheita do milho e casca de arroz. Apenas a primeira função canônica mostrou-se significativa, entretanto apresentou baixo R² canônico. Encontrou-se uma tendência de altos teores de carbono, hidrogênio e enxofre e baixos teores de nitrogênio estarem associados com altos teores de extrativos totais dos resíduos lignocelulósicos avaliados. Esses resultados preliminares mostram que as correlações canônicas não foram eficientes para explicar as correlações existentes entre os componentes químicos elementares e os teores de lignina e o poder calorífico superior.Palavras-chave: Estatística multivariada, função canônica, bioenergia. CANONICAL CORRELATIONS BETWEEN CHEMICAL AND ENERGETIC CHARACTERISTICS OF LIGNOCELLULOSIC WASTES ABSTRACT: Canonical correlation analysis is a statistical multivariate procedure that allows analyzing linear correlation that may exist between two groups or sets of variables (X and Y). This paper aimed to provide canonical correlation analysis between a group comprised of lignin and total extractives contents and higher heating value (HHV) with a group of elemental components

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“…In biomass, low amounts of nitrogen are desirable, since they result in environmental pollution, with the formation of some compounds after biomass combustion, such as nitrogen oxides (BILGEN; KAYGUSUZ, 2008;KUMAR et al, 2010). In this study, the content of nitrogen was higher in Ipé wood (Table 10).…”

Section: Elemental Chemical Analysis and Heating Valuementioning

confidence: 62%

Effect of Extractives and Carbonization Temperature on Energy Characteristics of Wood Waste in Amazon Rainforest

Moulin

Nobre

Castro

et al. 2017

CERNE

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ABSTRACT:The objective of this study was to evaluate the effect of extractives soluble in hot water, besides final carbonization temperatures, on the gravimetric yield and properties of charcoal for waste of three native forest species from the Amazon region. Waste cuttings of Ipé, Grapia and Maçaranduba species, from the machine processing for joinery of a company in the State of Pará, were used. Carbonization was carried out in an adapted electric furnace with a heating rate of 1.67°C min -1 and final temperatures of 500, 600 and 700°C. The waste was carbonized fresh after extraction in hot water to remove extractives. Gravimetric yields were analyzed, as well as chemical features and high heating value. In the evaluation of the experiment, arranged in a factorial scheme with three factors (species x temperature x material with and without extraction), and Principal Component Analysis used too. The presence of extractives (soluble in hot water) from wood waste had little influence on the gravimetric yield and immediate chemical composition of charcoal; however, it showed a greater high heating value and lower contents of hydrogen and nitrogen. The increase in the final carbonization temperature reduced the gravimetric yield in charcoal, the content of volatile materials and hydrogen, with a higher content of fixed carbon, carbon and high heating value. The treatments with the best energy characteristics were obtained from Ipé and Maçaranduba charcoals with extractives produced at 600°C, in addition to Ipê and Maçaranduba charcoals with and without extractives obtained at 700°C. EFEITO DOS EXTRATIVOS E TEMPERATURA DE CARBONIZAÇÃO NAS CARACTERÍSTICAS ENERGÉTICAS DE RESÍDUOS MADEIREIROS DA AMAZÔNIARESUMO: O objetivo foi avaliar o efeito dos extrativos solúveis em água quente e temperatura final de carbonização no rendimento gravimétrico e propriedades do carvão vegetal em resíduos de três espécies florestais nativas, provenientes da região amazônica. Foram utilizados resíduos de aparas das espécies de ipê, garapa e maçaranduba, provenientes do processamento de usinagem da marcenaria de uma empresa do estado do Pará. As carbonizações foram realizadas em forno elétrico adaptado utilizando uma taxa de aquecimento de 1,67°C min -1 e temperaturas finais de 500, 600 e 700ºC. Os resíduos foram carbonizados in natura e após extração em água quente para remoção dos extrativos. Foram analisados os rendimentos gravimétricos, as análises químicas e o poder calorífico superior. A presença de extrativos solúveis em água quente dos resíduos das madeiras pouco influenciaram no rendimento gravimétrico e na composição química imediata do carvão vegetal, contudo apresentou maior poder calorífico superior, menor teor de hidrogênio e nitrogênio. O aumento da temperatura final de carbonização reduziu o rendimento gravimétrico em carvão vegetal, o teor de materiais voláteis e de hidrogênio, havendo aumento do teor de carbono fixo, teor de carbono e poder calorífico superior. Os tratamentos com as melhores características energéticas fo...

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The calculation of the chemical exergies of coal-based fuels by using the higher heating values

Cited by 90 publications

References 13 publications

Brazilian Lignocellulosic Wastes for Bioenergy Production: Characterization and Comparison with Fossil Fuels

Brazilian Lignocellulosic Wastes for Bioenergy Production: Characterization and Comparison with Fossil Fuels

Correlações canônicas entre as características químicas e energéticas de resíduos lignocelulósicos

Effect of Extractives and Carbonization Temperature on Energy Characteristics of Wood Waste in Amazon Rainforest

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