Fluidization
Mostrando 25-36 de 85 artigos, teses e dissertações.
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25. 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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26. Aplicação da metodologia de analise espectral Gaussiana para monitorar e controlar a defluidização em processo de recobrimento de particulas / Application of the Gaussian spectral analysis methodology to monitor and control the defluidization in the particles coating process
A operação de fluidização tem sido muito utilizada em inúmeros processos industriais nos setores químicos, alimentício e farmacêutico em função das suas características vantajosas, que possibilitam um contato bastante efetivo entre a fase sólida e a fase fluida. No entanto, as condições de operação destes processos freqüentemente podem condu
Publicado em: 2009
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27. Study of Fluidized Bed Hot Melt Granulation using solid Dispersion of Indomethacin / Estudo da granulação por solidificação de materiais fundidos em leito fluidizado utilizando dispersão sólida de indometacina
Recently, there is a renewed interest in the fluidized bed hot melt granulation for the preparation of solid dosage forms in the pharmaceutical industry and academy. The several advantages of this technique have attracted may researchers, but the main advantage are undoubtedly the solvent free operation and the short processing times. The aim of this work wa
Publicado em: 2009
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28. Comportamento de filtros rápidos de camada profunda no tratamento de águas de abastecimento mediante o emprego de polímeros como auxiliares de filtração. / Behavior of deep bed rapid filters treating public water supplies through the use of polymers as filter aids.
The project was to evaluate the use of anionic and cationic polymers of different molecular weights as filter aids to treat drinking water treatment of surface water sources with high degree of eutrophication, particularly with regard to particulate matter removal optimization and head loss rate minimization. The experimental apparatus was composed of four p
Publicado em: 2009
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29. Tratamento de esgoto sanitário em um reator de leito expandido em escala plena, operado com regiões anaeróbia e aeróbia sobrepostas / Treatment of sanitary wastewater in a full scale expanded bed reactor, operated with overlap anaerobic and aerobic regions
This present research had as main objective the evaluation of the performance of a full scale expanded bed reactor (159.0 M POT.3), operated under anaerobic and overlapping anaerobic-aerobic, treating sanitary wastewater. As specific objectives, it was evaluated using commercial sand to complement the bed of particles and distribution of material support alo
Publicado em: 2009
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30. Behavior and fluidization of the cohesive powders: agglomerates sizes approach
This work focuses on the fluidization of three types of TiO2 powders: Anatase (99% TiO2), Rutile 1 (95% TiO2 and 5% Al) and Rutile 2 (96.5% TiO2 and 3.5% Al and Si); the average diameters of the powders are 204 nm, 159 nm and 167 nm, respectively. These powders belong to group C of the Geldart classification and are characterized as cohesive powders with a n
Brazilian Journal of Chemical Engineering. Publicado em: 2008-12
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31. Arraste de partÃculas finas em um leito fluidizado e eficiÃncia de coleta de um ciclone dipleg
The system with a fluidized bed and a cyclone dipleg as gas-solid separator is used in industry in unities of circulating fluidization. Some applications are: the fluid catalytic cracking, to produce gasoline and heating oil and the beds of combustion. The principal variables to be identified in the cited system are the flux of entrained particles in the bed
Publicado em: 2008
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32. Arraste de partículas finas em um leito fluidizado e eficiência de coleta de um ciclone dipleg
O sistema com um leito fluidizado e um ciclone dipleg como separador gás-sólido é usado industrialmente em unidades de fluidização circulante. Entre outras aplicações estão: o craqueamento catálitico do petróleo, para produção de gasolina e óleo combustível e leitos de combustão. As principais variáveis a serem identificadas no sistema citado
Publicado em: 2008
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33. Secagem de sementes de gramíneas (Brachiaria brizantha) em leito fluidizado
Drying operation is an important stage of the processing that precedes the storage of seeds, since that with low moisture contents, these can retain their power of germination and other qualities for long periods. The objective of this work was to perform a study of drying of grass seeds (Brachiaria brizantha) in a batch fluidized bed, in order to evaluate t
Publicado em: 2008
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34. Atrito de particulas solidas de cloreto de sodio (NaCl) em leite fluidizado gasoso / Attrition of solid particles of sodium chlroide (NaCl) in gas-fluidized bed
O atrito de sólidos particulados é um problema enfrentado pelas indústrias que utilizam leito fluidizado parcialmente ou na totalidade de seus processos, tais como petroquímicas e farmacêuticas. Tal atrito é caracterizado pela ruptura ou desgaste involuntário das partículas durante a manipulação, processamento e armazenamento dos sólidos, sendo es
Publicado em: 2008
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35. The effect of vibration on bed voidage behaviors in fluidized beds with large particles
The effects of vibration parameters, operating conditions and material properties on bed voidage were investigated using an optical fiber probe approach in a vibrating fluidized bed with a diameter of 148 mm. Variables studied included frequency (0-282 s-1), amplitude (0 mm-1 mm), bed height (0.1 m-0.4 m) as well as four kinds of particles (belonging to Geld
Brazilian Journal of Chemical Engineering. Publicado em: 2007-09
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36. Drying in the rotating-pulsed fluidized bed
There are particulate materials that are cohesive when wet. Although they are Geldart's group A dry powders, they show difficulties in fluidizing in a conventional fluidized bed, which could be diminished by modifying the fluidization equipment. Therefore, the objective of this work was to study the drying of cohesive particulate material using a rotating-pu
Brazilian Journal of Chemical Engineering. Publicado em: 2007-03