Fluidized Bed Combustion
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. Effect of Lime Addition to CaSO 4 Oxygen Carrier in Chemical Looping Combustion
Abstract Chemical-looping combustion (CLC), which has the characteristic of greenhouse gas CO2 inherent separation, is a novel combustion technology. In this study, CLC experiments of methane using CaSO4 oxygen carrier with lime addition were carried out in a batched fluidized bed reactor, where the sample was exposed to alternate oxidizing and reducing cond
Braz. J. Chem. Eng.. Publicado em: 2018-01
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2. EVALUATION OF LIMESTONE IMPURITIES IN THE DESULFURIZATION PROCESS OF COAL COMBUSTION GAS
Abstract Limestones have been used to capture SO2 emitted during the combustion of coal for decades. However, due to the complexities of the variables involved in this process, many issues are still being studied. Some tests were performed in a fluidized bed reactor, which was used to evaluate the performance of the limestones in the bed for flue gas desulfu
Braz. J. Chem. Eng.. Publicado em: 2017-01
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3. DOLOMITE DESULFURIZATION BEHAVIOR IN A BUBBLING FLUIDIZED BED PILOT PLANT FOR HIGH ASH COAL
Abstract Although fluidized bed in situ desulphurization from coal combustion has been widely studied, there are aspects that remain under investigation. Additionally, few publications address Brazilian coal desulphurization via fluidized beds. This study used a 250 kWth bubbling fluidized bed pilot plant to analyze different aspects of the dolomite desulphu
Braz. J. Chem. Eng.. Publicado em: 2016-06
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4. Simulação trifásica por técnicas de CFD da combustão de carvão mineral em leito fluidizado circulante / Three-phase CFD simulation of coal combustion in a circulating fluidized bed reactor
A queima de carvão mineral em Leito Fluidizado Circulante (CFBC) tem interessado pesquisadores por várias décadas, tendo sido propostos inúmeros modelos matemáticos que visam descrever os complexos fenômenos de transferência de massa, energia e quantidade de movimento deste sistema gás-sólido. A fase sólida é uma mistura de materiais inertes, como
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/09/2012
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5. Estudos de processos avançados em geração termelétrica utilizando leitos fluidizados consumindo biomassa / Advanced studies on power generation processes based on fluidized beds consuming biomass
A study aiming maximizing the efficiency of an advanced combined power generation process has been developed. The process applies a pressurized fluidized bed boiler consuming sugar cane bagasse fed as slurry. The generated steam is diverted to a reheated Rankine cycle while the gas exiting the boiler is directed to a gas turbine process. Many assumptions hav
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/07/2012
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6. Um estudo da combustão de carvão mineral CE4500 em reator de leito fluidizado borbulhante / A study of CE4500 mineral coal combustion in a bubbling fluidized bed reator
O carvão mineral apresenta-se como uma importante alternativa para geração termoelétrica no Brasil. Os carvões brasileiros, porém, são caracterizados por elevados teores de enxofre, e na sua combustão libera-se consideráveis de quantidades dióxido de enxofre. O processo de combustão em leito fluidizado apresenta-se particularmente adequado para a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2011
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7. FBC desulfurization process using coal with low sulfur content, high oxidizing conditions and metamorphic limestones
A metamorphic limestone and a dolomite were employed as SO2 sorbents in the desulfurization of gas from coal combustion. The tests were performed in a fluidized bed reactor on a bench and pilot scale. Several parameters such as bed temperature, sorbent type, and sorbent particle size at different Ca/S molar ratios were analyzed. These parameters were evaluat
Publicado em: 2011
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8. FBC desulfurization process using coal with low sulfur content, high oxidizing conditions and metamorphic limestones
A metamorphic limestone and a dolomite were employed as SO2 sorbents in the desulfurization of gas from coal combustion. The tests were performed in a fluidized bed reactor on a bench and pilot scale. Several parameters such as bed temperature, sorbent type, and sorbent particle size at different Ca/S molar ratios were analyzed. These parameters were evaluat
Brazilian Journal of Chemical Engineering. Publicado em: 2009-06
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9. Caracterização de cinza obtida por combustão de casca de arroz em reator de leito fluidizado
The rice husk combustion in a bubbling and atmospheric fluidized bed reactor was investigated. This paper presents the rice husk ash characterization employing the techniques of X-ray diffraction (XRD), X-ray fluorescence (XRF), and scanning electron microscopy (SEM) among others. After combustion, a rice husk ash containing 93% amorphous silica and <3% unbu
Química Nova. Publicado em: 2009
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10. Estudo experimental das emissões de NOx na combustão de carvão mineral brasileiro em leito fluidizado rapido / Experimental study of NOx emissions from brazilian mineral coal combustion in fast fluidized bed
O objetivo deste trabalho é avaliar as emissões de óxidos de nitrogênio (NO + NO2) durante a combustão de carvão mineral com adição de calcário dolomítico como adsorvente em leito fluidizado circulante (LFC). As variáveis de influência estudadas foram o excesso de ar, que variou entre 18 e 32 %, e a relação molar cálcio enxofre (Ca/S) que vari
Publicado em: 2009
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11. Effect of secondary air injection on the combustion efficiency of sawdust in a fluidized bed combustor
Agricultural wastes like bagasse, paddy husks, sawdust and groundnut shells can be effectively used as fuels for fluidized bed combustion; otherwise these biomass fuels are difficult to handle due to high moisture and fines content. In the present work the possibility of using sawdust in the fluidized bed combustor, related combustion efficiencies and proble
Brazilian Journal of Chemical Engineering. Publicado em: 2008-03
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12. A Study of the SO IND.2sorption by limestone in thermogravimetric analyser and coal combustion in fluidized bed / Um estudo da sorção de SO IND.2por calcário em analisador termogravimétrico e na combustão de carvão em leito fluidizado
This thesis investigates the sorption of SO IND.2by a brazilian dolomite in two different experimental setups: a thermogravimetric analyzer and an atmospheric bubbling fluidized bed coal combustor. The thermogravimetric experiments were carried out in conditions as close as possible to those observed in the fluidized bed combustion process. Intrinsic coeffic
Publicado em: 2008