Reactor Network
Mostrando 13-23 de 23 artigos, teses e dissertações.
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13. Identificação de sistemas "on-line", otimização e controle avançado com o filtro de Kalman estendido / On line system identification, advanced control and optimization with the (Extended) Kalman filter
In the continuing competition between it will be more and more necessary to optimize current chemical processes in real time. To be able to optimize a plant in real time, there have to be various aspects to be fulfilled, such as measurement, reliability of the measurement and prediction of the process behaviour. In this work some of the aspects of such an ad
Publicado em: 2006
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14. Desenvolvimento de um reator fotoquímico aplicável no tratamento de efluentes fenólicos presentes na indústria do petróleo / Development of a photochemistry reactor applicable in the treatment of phenolic wastewaters present in the petroleum industry
Com o crescente aumento da poluição das águas acorrido nos últimos anos, houve também um grande avanço das pesquisas relacionadas ao tratamento de águas contaminadas. Efluentes contendo compostos orgânicos de alta toxicidade, nos quais o tratamento biológico não pode ser aplicado, os chamados processos oxidativos avançados (POA) surgem como uma al
Publicado em: 2005
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15. Estudos e desenvolvimento de processos de pós condensação no estado sólido do PET reciclado / Studies and development of solid state polymerization process on poly(ethilene terephalate) recycled abstract
The increasing requirement of Ply(ethylene terephtalate) PET from the package market has made this available to the public discarded, quickly, since the technology of multi way package hasnt been possible due to high cost on the plant and its inadequate reuse. In the PET mechanical recycling, the most used way worldwide to recovery this material, the feature
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/12/2003
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16. Modeling and simulation of a pseudo-two-phase gas-liquid column reactor for thermal hydrocracking of petroleum heavy fractions
This work presents a model to predict the behavior of velocity, gas holdup and local concentration fields in a pseudo-two-phase gas-liquid column reactor applied for thermal hydrocracking of petroleum heavy fractions. The model is based on the momentum and mass balances for the system, using an Eulerian-Eulerian approach. Using the k-epsilon model,fluid dyna
Brazilian Journal of Chemical Engineering. Publicado em: 2002-07
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17. Degradação fotoquímica de hidrocarbonetos da gasolina em efluentes aquosos / Photochemical degradation of the gasoline of hydrocarbons in wastewaters
Photo-oxidation processes of toxic organic compounds have been widely studied. This work seeks the application of the photo-Fenton process for the degradation of hydrocarbons in water. The gasoline found in the refinery, without additives and alcohol, was used as the model pollutant. The effects of the concentration of the following substances have been prop
Publicado em: 2002
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18. 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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19. Modelagem matematica e simulação numerica de um sistema reacional composto por reatores tipo tanque agitado e tubular em processos de polimerização
The present work consists of a mathematical modeling and numerical simulation of a solution polymerization reaction, using as study case the polystyrene. The reaction system is composed by a continuous stirred tank reactor (CSTR) for prepolymerization, associated in series with a tubular reactor to carry out the reaction until high conversion values. A simpl
Publicado em: 2001
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20. 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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21. Modelagem matematica para reator trifasico : modelos deterministicos, neuronais e hibridos
In this work, a study on the mathematical modeling of a three-phase catalytic surry reactor is developed, using two approach. In the first, the reactor is described by their phenomenological equations expressing the mass and energy balances for the system. In the second, artificial neural network techniques is considered in representing the three-phase react
Publicado em: 1999
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22. Modelagem e simulação de regeneradores industriais
In this work, it is developed a software to simulate a regeneration system of a catalytic cracking industrial unit. Firstly, deterministic models are developed, and latter on, it is used backpropagation neural network and a hybrid model with neural network. The regeneration system is formed by a sequence of reactors with different hydrodynamic regime. A flui
Publicado em: 1994
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23. A Benchmark for Methods in Reverse Engineering and Model Discrimination: Problem Formulation and Solutions
A benchmark problem is described for the reconstruction and analysis of biochemical networks given sampled experimental data. The growth of the organisms is described in a bioreactor in which one substrate is fed into the reactor with a given feed rate and feed concentration. Measurements for some intracellular components are provided representing a small bi
Cold Spring Harbor Laboratory Press.