Circulating Fluidized Bed
Mostrando 13-20 de 20 artigos, teses e dissertações.
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13. Avaliação das emissões de S O IND.2 em leito fluidizado circulante na combustão de carvão mineral brasileiro e dolomita / Evaluation of S O IND.2 emissions from brazilian mineral coal combustion with dolomite in circulating fluidized bed
Este trabalho apresenta o estudo experimental do processo de combustão de carvão mineral brasileiro em reator de Leito Fluidizado Circulante (LFC) com o objetivo de avaliar as taxas de emissões de di óxido de enxofre (S02) e eficiência de conversão de carbono no processo de combustão. Para diminuir a emissão do S02 nos gases de exaustão, foi adicion
Publicado em: 2007
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14. Simulação de escoamentos gás-sólido reativos em leitos fluidizados circulantes / Simulation of reactive gas-solid flows in circulating fluidized beds
Circulating fluidized bed reactors are widely used in large scale applications such as catalytic cracking of petrol and coal combustion. Development and design in those areas are strongly based on demonstration plants, at extremely high costs. In this context, treatments applying computational fluid mechanics assume considerable relevance. The complex gas-so
Publicado em: 2006
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15. Numerical simulation of fluid flow in CFB risers: A turbulence analysis approach
Turbulence parameters are derived from results of numerical simulation of gas-solid flow in circulating fluidized bed (CFB). A two fluid model with constant viscosity is applied considering an Eulerian continuum approach for both phases. An analysis is performed using a direct numerical integration of balance equations without an explicit use of any turbulen
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-06
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16. A numerical simulation analysis of the effect of the interface drag function on cluster evolution in a CFB riser gas-solid flow
The dynamics of formation, dissipation and breaking of coherent structures in the riser gas-solid flow of a circulating fluidized bed (CFB) are evaluated by numerical simulation. The simulation is performed using the MICEFLOW code, which includes IIT's two-fluid hydrodynamic model B. The methodology for cluster characterization is used from Sharma et al. and
Brazilian Journal of Chemical Engineering. Publicado em: 2004-12
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17. Fluid dynamic modelling and simulation of circulating fluidized bed reactors: importance of the interface turbulence transfer
The main objective of this work is to analyze the importance of the gas-solid interface transfer of the kinetic energy of the turbulent motion on the accuracy of prediction of the fluid dynamic of Circulating Fluidized Bed (CFB) reactors. CFB reactors are used in a variety of industrial applications related to combustion, incineration and catalytic cracking.
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2001
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18. Modelagem fenomenologica e simulação bidimensional da fluidodinamica de reatores de leito fluidizado circulante
Circulating Fluidized Bed (CFB) reactors are used in a variety of industrial applications especially related to combustion and catalytic cracking. The fluid dynamic prediction of CFB is fundamental in its development and optimisation. In this work, a computer code for the simulation of the fluid dynamics of Circulating Fluidized Bed Reactors was developed. T
Publicado em: 1998
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19. Estudo da fluidodinamica de leitos fluidizados circulantes com injeção de ar secundario
The increasing usage of circulating fluidized beds in gas-solid processes enphasizes the need of further theoretical and experimental studies of these equipments. Improvements are introduced decurring from experience in the field, many times without knowledge of the basic phenomenology behind. The secondary air injection is often used in fluidized bed combus
Publicado em: 1995
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20. Estudo da transferencia de massa num reator trifasico de leito fluidizado circulante na oxidação do etanol e acido acetico com celulas imobilizadas de Acetobacter S.P
The objective of this work is the study of the kinetic and oxygen transfer in the oxidation of ethanol to acetic acid by immobilized cells, in a circulating three phase fluidized bed bioreactor. In this context experiences with Acetobacter cells, free and immobilized by entrapment in sodium aginate were done. In the first phase of the study, a strain at Acet
Publicado em: 1992