Combustion of agricultural residues: An experimental study for small-scale applications

Cardozo, Evelyn; Erlich, Catharina; Alejo, Lucio; Fransson, Torsten

doi:10.1016/j.fuel.2013.07.054

Cited by 78 publications

(48 citation statements)

References 20 publications

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“…As cinzas residuais apresentaram também traços de chumbo, crômio, níquel, zinco e zircônio, que provavelmente estão relacionados aos tipos de solos de onde as biomassas florestais cresceram (CARDOZO et al, 2014).…”

Section: Discussionunclassified

“…Ressalta-se que os valores de CO entre 2.459-14.170 mg.m -3 , encontrados nesse estudo (Tabela 3), são superiores aos resultados relatados por outros pesquisadores (CARDOZO et al, 2014;ROY et al, 2013) porque trata-se de equipamentos com potência e eficiência diferentes. Além disso, a emissão de CO é muito sensível às variáveis do processo de queima como a granulometria da biomassa, densidade a granel, teor de umidade, entrada de ar primária e secundária e atmosfera de queima do forno.…”

Section: Discussionunclassified

“…Os valores para as emissões de óxidos de nitrogênio desse estudo são superiores aos relatados por outros autores (FILBAKK et al, 2011;ROY et al, 2013;CARDOZO et al, 2014). Entretanto, essas divergências se devem as diferenças na potência do equipamento queimador e eficiência da combustão.…”

Section: Discussionunclassified

“…Já os estudos de Pirraglia et al (2012), analisando seis espécies de eucaliptos, concluíram que a composição de enxofre nessa biomassa florestal foi insignificante, ou seja, tipicamente inferior a 0,1%. No entanto, alguns autores (CARDOZO et al, 2014;ROY et al, 2013) relatam emissões de óxidos de enxofre entre 0,01-0,03% mg.m -3 , para diversos tipos de biomassas florestais. Possivelmente por essas baixas emissões características de óxidos de enxofre na combustão de derivados da biomassa florestal, a Resolução nº 436 (BRASIL, 2011), não prevê nenhum parâmetro limitante para esses poluentes.…”

Section: Discussionunclassified

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Emissões De Gases Do Efeito Estufa Da Queima De Pellets De Madeira

Garcia

Caraschi

Ventorim

2017

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ResumoAs previsões indicam crescimento do uso da biomassa florestal como recurso energético nos próximos anos, sobretudo depois dos recentes acordos firmados pela Cúpula do Clima em Paris (COP21), que apontam a necessidade de substituir combustíveis fósseis por fontes renováveis e de baixas emissões de gases do efeito estufa (GEE). Há poucos estudos relacionando a combustão dos pellets de madeira com os limites dessas emissões estabelecidos para a biomassa florestal. Este estudo comparou as emissões da combustão dos pellets com os limites máximos estabelecidos na Resolução nº 436 do CONAMA. Utilizou-se quatro amostras de pellets de madeira e três biomassas florestais (casca de pinus, cavacos de pinus e serragem de eucalipto). Para a combustão foi utilizado um queimador de biomassa vegetal, com alimentação automática e consumo de 14 kg por hora. As análises das emissões foram realizadas com o analisador eletroquímico Unigas 3000 MKIII, que determinou a composição química dos gases da combustão. Os resultados mostraram que os pellets de madeira têm baixas emissões de CO, NO x e SO x . Assim, conclui-se que as biomassas florestais atendem aos limites de emissões gasosas estabelecidos pela legislação vigente, com exceção da serragem de eucalipto e a casca de pinus. Palavras-chave: Biomassa florestal; combustível sólido; cinzas; combustão; COP21. Abstract Emissions of greenhouse effect gases from wood pellets burning.Forecasts indicate the growth in use of forest biomass as the energy resource in the coming years, especially after the recent agreements reached at Paris Climate Summit -COP21, which imply the replacement of fossil fuels for renewable ones, with lowemission Greenhouse Gas -GHG. There are few studies relating the wood pellets combustion with the limits of these emissions established for forest biomass. This study compared the pellet combustion emissions with the maximum limits established in Resolution nº 436 of the National Council of Environment -CONAMA. Four samples of wood pellets and three forest biomasses (pine bark, pine chip and eucalyptus sawdust) were used. A vegetable biomass burner was used for combustion, with automatic feed and consumption of 14 kg per hour. Emissions analyzes were performed with the Unigas 3000 MKIII electrochemical analyzer, which determined the chemical composition of the combustion gases. The results showed that the wood pellets have low CO, NO x and SO x emissions. Thus, it can be concluded that these biomasses meet the gaseous emission limits established by the current legislation, except for eucalyptus sawdust and pine bark biomass. Keywords: Forest biomass; solid fuel; ashes; combustion; COP21. INTRODUÇÃOAs emissões de dióxido de carbono (CO 2 ), da queima de combustíveis fósseis, contribuiu com cerca de 78% do aumento dos gases do efeito estufa (GEE) no período de 1970 a 2010. Apesar de um número crescente de políticas de mitigação das mudanças climáticas, essas emissões cresceram 2,2% ao ano, entre 2000 e 2010. Nos trinta anos anteriores a este período, a velocida...

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Section: Discussionunclassified

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Emissões De Gases Do Efeito Estufa Da Queima De Pellets De Madeira

Garcia

Caraschi

Ventorim

2017

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“…This variety is especially present in the content of the element carbon (in the biomass it is almost two times less than in the coal) and element oxygen (about four times greater the content in the biomass), and the volatiles, as well as the moisture. The presence of chlorine, potassium, sodium and phosphorus is significant, because these elements can cause many operating problems during combustion process such as slagging, fouling and corrosion [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

The impact of co-firing sunflower husk pellets with coal in a boiler on the chemical composition of flue gas

Zajemska

Urbańczyk²,

Poskart

et al. 2017

E3S Web Conf.

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Abstract. The aim of the article is the offer of control of environmentally undesirable products of coal and biomass co-firing with the use of numerical methods. The article analyzes the impact of co-combustion of coal and pellets made of sunflower husk in power plant boiler with a capacity of 125 MW on the composition of the flue gas. Based on the data obtained from a real object, in particular: the combustion temperature, the reagent fluxes, i.e. air, coal and biomass, as well as the elemental composition of the fuels supplied into the boiler, the initial conditions were formulated and the computer simulations were made, leading to determining the chemical composition of flue gas. Numerical calculations were performed using the latest version of CHEMKIN-PRO software. Chemical mechanism was developed by the Italian group The CRECK Modeling and it included 134 compounds and 4169 chemical reactions, including reactions of forming chlorine compounds. Additionally, the impact of selected parameters, e.g. temperature on the chemical composition changes of the combustion products was analyzed. Developed calculation model with the implemented chemical mechanism was verified by data collected from the real conditions, leading to increasing the reliability of the results. The calculations showed that the most important influence on the composition of the flue gas from the co-firing process of coal with sunflower husk has a composition of biomass. It should be emphasized that the results of computer simulations obtained by the authors have an useful aspect and can be applied in practice, especially to the analysis of the mechanism of chloride corrosion which is possible to occur due to the chlorine content in the biomass. They may also be useful for evaluating the unburned hydrocarbons produced by combustion of rich mixtures (λ < 1.0).

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Flowsheet Modeling and Simulation of Biomass Steam Gasification for Hydrogen Production

et al. 2020

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Hydrogen production from biomass steam gasification is systematically reviewed. Equilibrium modeling and simulation studies using various techniques for effective hydrogen production are presented. Heat integration, economic analysis of the hydrogen production, and systematic design algorithms research publications are overviewed and discussed for energy‐efficient and economic hydrogen production from various biomass feedstocks. Comparison and analysis of the results strongly suggest the viable potential of biomass steam gasification for hydrogen production from small to large scales with applications for thermal heat, power generation, and many other industrial fields.

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Combustion of agricultural residues: An experimental study for small-scale applications

Cited by 78 publications

References 20 publications

Emissões De Gases Do Efeito Estufa Da Queima De Pellets De Madeira

Emissões De Gases Do Efeito Estufa Da Queima De Pellets De Madeira

The impact of co-firing sunflower husk pellets with coal in a boiler on the chemical composition of flue gas

Flowsheet Modeling and Simulation of Biomass Steam Gasification for Hydrogen Production

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