Membrane Reactor
Mostrando 13-24 de 45 artigos, teses e dissertações.
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13. Modelagem e simulação de um reator catalítico de membrana inerte permseletiva a hidrogênio com transferência de calor e massa / Modeling and simulation of a catalytic reactor with a permselective to hydrogen inert membrane with heat and mass transfer
Dentre os termoplásticos mais utilizados atualmente na indústria, pode-se mencionar o estireno, principal responsável pela produção de plásticos e borrachas. No processo de fabricação de estireno, a principal rota química é por meio da desidrogenação de etilbenzeno, com o hidrogênio como subproduto. A conversão de etilbenzeno nesta reação é
Publicado em: 2011
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14. Ethyl oleate production by means of pervaporation-assisted esterification using heterogeneous catalysis
Pervaporation-assisted esterification of oleic acid and ethanol was investigated by means of heterogeneous acid catalysis with the aim of increasing the ethyl oleate yield. The experimental strategy comprised kinetic tests with Amberlyst 15 Wet (Rohm & Haas), the characterization of hydrophilic Pervap 1000 membrane (Sulzer) and the evaluation of the membrane
Brazilian Journal of Chemical Engineering. Publicado em: 2010-12
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15. Inverted sugar syrup attained from sucrose hydrolysis using a membrane reactor
Invertase, na forma adsorvida ou não em copolímeros de estireno-divinilbenzeno, foi usada para a hidrólise contínua de sacarose utilizando um reator com membrana (RM), acoplado a uma membrana de ultrafiltração (UF-100kDa), ou de microfiltração (MF - um diâmetro de poro de 5µm). Em todos os testes, o pH (5,5), a temperatura (30ºC), o volume reacion
Brazilian Journal of Pharmaceutical Sciences. Publicado em: 2010-09
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16. Enzimas microbianas na conversão da sacarose em frutose e ácido glicônico usando reatores descontínuo-alimentado e contínuo com membrana / Conversion of sucrose into fructose and gluconic acid by microbial enzymes using fed-batch and membrane continuous reactors
A sacarose é uma matéria-prima em franca expansão de produção no Brasil, seu maior produtor e exportador. Essa molécula pode ser convertida, através de um processo multienzimático, em produtos de maior valor agregado: frutose e ácido glicônico, os quais são importados pelo país, e amplamente utilizados em indústrias químicas, de produção de f
Publicado em: 2010
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17. Hydrogen from biomass gas steam reforming for low temperature fuel cell: energy and exergy analysis
This work presents a method to analyze hydrogen production by biomass gasification, as well as electric power generation in small scale fuel cells. The proposed methodology is the thermodynamic modeling of a reaction system for the conversion of methane and carbon monoxide (steam reforming), as well as the energy balance of gaseous flow purification in PSA (
Brazilian Journal of Chemical Engineering. Publicado em: 2009-03
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18. Estudo da permeação de hidrogênio em reator com membrana de paládio: modelagem matemática e simulação computacional
Hydrogen is the simplest and most common element in the universe. Currently, some industries use hydrogen to refine oil, and to produce ammonia and methanol. Since the combustion of hydrogen produces only water and energy, it is considered to be viable and environmentally safe. Most of the hydrogen produced in industrial scale is by the steam reforming proce
Publicado em: 2009
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19. Sistema para corrosão anisotropica profunda de sensores microeletromecanicos / Anisotropic etching system for micro electrical mechanical sensor
Integrated Silicon Sensors and Microelectromechanical Systems (MEMSs) have been developing drived mainly by the micro and nanoelectronic industry s continuous growth. As a result, MEMSs have been spreading out very quickly into commercial products. In fact, MEMSs have undertaken room in automotive market where pressure sensors as well as accelerometers have
Publicado em: 2009
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20. Caracterização de comunidades bacterianas mesófilas e termófilas em biorreatores a membrana durante o tratamento de efluentes de fábrica de papel reciclado / Characterization of mesophilic and thermophilic bacterial communities in membrane bioreactors during treatment of recycled paper mill effluents
Paper mils consume large quantities of water and thus generate high volume of effluents. Biological treatment of paper mils industrial effluent is widely used for this purpose. The new technology of membrane bioreactors under thermophilic conditions is still underused due to the lack of sufficient technical and scientific knowledge. In spite of their importa
Publicado em: 2009
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21. Construction of microsensors and its application in biofilms used in wastewater treatment / Construção de microssensores e sua aplicação para estudo de biofilme empregado no tratamento de água residuária
The goal of the current research was the construction of amperometric and potentiometric microsensors to measure dissolved oxygen (DO), hydrogen sulfide (H IND.2S), nitrite, nitrate, ammonium and pH in biofilms applied at wastewater treatment. The biofilms that were analyzed with the constructed microsensors were grown at the surface of flat-plate reactors,
Publicado em: 2009
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22. AvaliaÃÃo do processo de reforma seca do metano em reator de membrana
O desenvolvimento do processo de reforma do metano com diÃxido de carbono abordado na presente pesquisa recorre à aÃÃo do catalisador de nÃquel suportado em alumina, disposto em reator de leito fixo com membrana seletiva para hidrogÃnio associada. Atividade e estabilidade do sistema de nÃquel (50mg), foram avaliadas atravÃs de contato catalisador com
Publicado em: 2009
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23. Oxygen mass transfer for an immobilised biofilm of Phanerochaete chrysosporium in a membrane gradostat reactor
A novel system, the membrane gradostat reactor (MGR), designed for the continuous production of secondary metabolites, has been shown to have higher production per reactor volume than batch culture systems. The MGR system mimics the natural environment in which wild occurring microorganism biofilms flourish. The biofilms are immobilised on the external surfa
Brazilian Journal of Chemical Engineering. Publicado em: 2008-12
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24. Reator de membrana enzimático e fluidos supercríticos: associação de processos
The aim of this work is to present the new applications of membrane technology in fat and oil processing, with emphasis on development and applications of the enzymatic membrane reactor and its association with extraction and purification technology by supercritical fluids (SCF). Combining the extraction by SCFs and the separation by membranes allows the int
Química Nova. Publicado em: 2007-08