Bubbling Fluidized Bed
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. KINETIC MODELING AND EXPERIMENTAL VALIDATION OF A PHOTOCATALYTIC FLUIDIZED BED REACTOR FOR n-HEXANE DEGRADATION
Abstract This work presents a modeling procedure for a tall photocatalytic fluidized bed photoreactor used for the photocatalytic oxidation of n-hexane on the anatase TiO2 surface. The modeling strategy split the reactor into two parts: a lower dense phase, with high solids concentration behaving as a bubbling bed treated as a continuous stirred tank reactor
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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2. NUMERICAL SIMULATION OF COAL GASIFICATION IN A CIRCULATING FLUIDIZED BED GASIFIER
Abstract This paper presents a 3D full-loop simulation of a circulating fluidized bed gasifier. The model is validated with experimental results from the literature. The validated model is thereupon used to compare Bubbling Fluidized Bed (BFB) and Circulating Fluidized Bed (CFB) gasifiers to highlight the effect of a change in fluidization regime from bubbli
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
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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. 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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5. Identification of defluidization region in a gas-solid fluidized bed using a method based on pressure fluctuation measurements
Industrial applications that involve fluidized bed operations must prevent the undesirable phenomenon of partial or complete bed defluidization. Defluidization can be avoided by increasing the gas velocity and/or, in some cases, changing the solid feed conditions in the system, provided that the changes in the hydrodynamics of the flow are detected early eno
Brazilian Journal of Chemical Engineering. Publicado em: 2009-09
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6. 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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7. Desenvolvimento experimental e validaÃÃes do processo catalÃtico (Ni/γ-Al2O3/CeO2-Al2O3) de reforma metano-diÃxido de carbono em reator de leito fluidizado
Carbon dioxide of methane reforming into syngas over Ni/γ-Al2O3 and Ni/CeO2-Al2O3 catalysts was investigated. The Nikel catalysts presented high activity and stability although of the potential of coke formation on its active sites. The development of the dry methane reform for process, main component of natural gÃs (GN), was studied in a fluidized bed
Publicado em: 2009
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8. Estudo da pirolise de poliamida-12 em leito fluidizado borbulhante / Study of pyrolysis of polyamide-12 in bubbling fluidized bed
O objetivo do presente trabalho consiste em avaliar a degradação térmica de poliamida-12 obtida como resíduo de processos de prototipagem rápida por via pirolítica para obtenção de produtos líquidos e gasosos que possam ser usados como insumos e para a geração de energia em indústrias. Foram utilizadas diferentes configurações no leito fluidiza
Publicado em: 2009
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9. 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
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10. Study of fast pyrolysis of sugarcane bagasse in a bubbling fluidized bed / Estudo da pirolise rapida de bagaço de cana em reator de leito fluidizado borbulhante
The energy content of biomass can be exploited by direct combustion or after conversion by physical, biological and thermochemical processes. Among the thermochemical processes there is the pyrolysis that is an attractive process because it provokes the conversion of solid biomass into liquids products. Such conversion presents many advantages in transport,
Publicado em: 2006
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11. Kinetic study of the pyrolysis of unsatured polyester with fiberglass using thermogravimetric analysis and bubbling fluidized bed / Estudo da pirolise de composito de poliester insaturado com fibra de vidro em balança termogravimetrica e leito fluidizado
Objetivo deste trabalho foi obter os parâmetros cinéticos do poliéster insaturado com fibra de vidro em balança termogravimétrica e a aplicação do leito fluidizado como reator de pirólise. Primeiramente foi feito um estudo para escolher o modelo cinético a partir dos dados obtidos na balança termogravimétrica. O resultado apontou o modelo de prime
Publicado em: 2006
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12. High temperature degradation by erosion-corrosion in bubbling fluidized bed combustors
Heat-exchanger tubes in fluidized bed combustors (FBCs) often suffer material loss due to combined corrosion and erosion. Most severe damage is believed to be caused by the impact of dense packets of bed material on the lower parts of the tubes. In order to understand this phenomenon, a unique laboratory test rig at Berkeley was designed to simulate the part
Materials Research. Publicado em: 2004-03