Plug Flow Reactor
Mostrando 13-23 de 23 artigos, teses e dissertações.
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13. Desenvolvimento de processo contínuo de copolimerização em emulsão em reator tubular. / Development of a continuous emulsion copolymerization process in a tubular reactor.
Industrial emulsion polymerization processes are usually performed in batch or semi-batch stirred tanks, or in continuous stirred tank reactors (CSTR). Continuous reactors have the advantage of being smaller and providing a better product quality control by the reduction of the batch-to-batch variations. In addition, periodical self-sustained oscillations in
Publicado em: 2008
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14. Avaliação da tecnologia de hidrolise acida de bagaço de cana / Evaluation surgarcane bagasse acid hydrolysis technology
One of the current concerns in the world is the energy supply for next decades, since the main energy source used nowadays is oil, a not renewable and increasingly expensive fossil fuel. Acid hydrolysis of cellulosic materials, with a subsequent fermentation of the hydrolyzed to obtain ethanol, has been considered an important alternative to produce ethanol
Publicado em: 2007
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15. Simple models for the continuous aerobic biodegradation of phenol in a packed bed reactor
Este artigo propõe o uso de uma etapa preliminar de remoção de fenol para redução de picos de carga na entrada de sistemas convencionais de tratamento de efluentes. Um reator de leito fixo (RLF) foi usado, tendo como suportes inertes espuma de poliuretano, vidro poroso e também fibras de coco. Nos experimentos foram controladas a vazão e as concentra�
Brazilian Archives of Biology and Technology. Publicado em: 2006-07
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16. Kinetics of helminth eggs inactivation in water and digested sludges by saturated steam produced with methane from anaerobic digestors. / Inativação térmica de ovos de helmintos em água e em biossólidos digeridos: cinética em reator batelada e modelagem matemática em reator tubular.
Biological sludge can be a valuable resource for agricultural soil conditioning. However, an important obstacle for its use is the usual presence of pathogenic organisms, capable of disease dissemination. The main occurring pathogens are virus, bacteria, protozoa and helminth. Helminth eggs are very resistant to thermal inactivation. The Ascaris lumbricoids
Publicado em: 2006
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17. Simulação, modelagem e analise de reator de polimerização de eteno em solução usando catalisador Ziegler-Natta / Simulation, modeling and analysis of ethylene polymerization reactor in solution using Ziegler-Natta catalyst
Polymerization processes are, generally, very complexes due to the high number of parallel reactions and chemical species in reactional medium. Besides, the polymerization reaction engineering may not only attain yield and purity specifications, but also obtain products with certain processability characteristic and final properties that are, in practice, th
Publicado em: 2005
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18. Disinfection of municipal wastewater with ozone for agriultural use / Desinfecção de efluentes de ETE com ozonio para uso agricola
Disinfection of wastewater, prior to its use in agriculture, is a treatment process indispensable to the protection of public health. In this context, ozone constitutes an alternative disinfectant to chlorine since it is very effective against a wide variety of pathogenic organisms and minimizes the formation of trihalomethanes. In this hesis, the effectiven
Publicado em: 2005
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19. Modelagem, simulação e analise de desempenho de reatores tubulares de polimerização com deflectores angulares internos
Deterministic model and emulsion homopolymerization process of styrene are applied in continuous tubular reactor without and with internal angular baffles under isothermic and no isothermic conditions. The modeling and simulation results were approximate to steady state, one-dimensional model, cylindrical coordinate, fully developed laminar plug flow, Smith-
Publicado em: 2004
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20. Cr (VI) electromechimal reduction using RVG 4OOO graphite felt as the electrode
Even in at very low concentrations, heavy metals in industrial waste constitute environmental and health risks. The U.S. Department of Health and Human Services has recognized as chromium compounds and defined carcinogens the level acceptable in drinking water as being only 0.05 ppm. The objective of this work was the electrochemical reduction of hexavalent
Brazilian Journal of Chemical Engineering. Publicado em: 2003-09
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21. Adaptive control using a hybrid-neural model: application to a polymerisation reactor
This work presents the use of a hybrid-neural model for predictive control of a plug flow polymerisation reactor. The hybrid-neural model (HNM) is based on fundamental conservation laws associated with a neural network (NN) used to model the uncertain parameters. By simulations, the performance of this approach was studied for a peroxide-initiated styrene tu
Brazilian Journal of Chemical Engineering. Publicado em: 2001-03
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22. Recent extensions of the residence time distribution concept: unsteady state conditions and hydrodynamic model developments
Two recent extensions of the residence time distribution concept are developed. The first one concerns the use of this method under transient conditions, a concept theoretically treated but rarely confirm by relevant experiments. In the present work, two experimental set-ups have been used to verify some limits of the concept. The second extension is devoted
Brazilian Journal of Chemical Engineering. Publicado em: 2000-12
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23. Fotodestruição de compostos potencialmente toxicos utilizando TiO2 e luz solar
The destruction of potentially toxic compounds by photocatalysis was studied in this work in two different systems: a) the system using colloidal TiO2, where the influence of silver deposits was evaluated for the photodegradation of phenol. b) the system using TiO2 P 25 supported on a glass plate as part of a plug flow reactor using solar light as source of
Publicado em: 1995