Membrane Separation Process
Mostrando 25-36 de 71 artigos, teses e dissertações.
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25. Separation of binary mixtures by pervaporation and reverse osmosis / Separação de misturas binarias por pervaporação e osmose inversa
In this work, the modelling and simulation of pervaporation and reverse osmosis processes for binary mixtures were carried out. The development of prediction methodologies for process variables of pervaporation and reverse osmosis without the necessity of experimental data was the general guideline followed; the experimental data used in these methodologies
Publicado em: 2007
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26. Low molecular weight lignosulfonates recovery by nanofiltration / Estudo da recuperação de lignossulfonatos de baixa massa molar por nanofiltração
Membrane separation processes like ultrafiltration (UF) and nanofiltration (NF) are used in the pulp and paper industry to the recovery of several species present in the wood digest waste that are interesting to other applications as lignin, sugars and specially lignosulfonates, improving the recirculation of the water in the pulping process and the reductio
Publicado em: 2007
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27. SÃntese e caracterizaÃÃo de membranas de acetato de celulose, obtido do bagaÃo de cana-de-aÃÃcar, e blendas de acetato de celulose com poliestireno de copos plÃsticos descartados
In the present dissertation, the synthesis and characterization of cellulose acetate membranes as well as cellulose acetate and polystyrene blends, were studied. Recycled materials were used to produce the blends. Cellulose acetate (CA) was produced from sugarcane bagasse, and waste plastic cups were used as polystyrene (PS) source. Blends, produced with dif
Publicado em: 2007
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28. Reator enzimático de membrana para proteólise de soro de queijo, visando à produção de concentrado protéico com baixo teor de fenilalanina
Enzymatic hydrolyzed proteins present some advantages over the pool of amino acids obtained after a chemical hydrolysis: lower osmolality (easier absorption by the organism) and better sensorial characteristics. The removal of phenylalanine (Phe) from these hydrolysates allows their use in the diet of phenylktonuria (PKU) patients. This Thesis studies the se
Publicado em: 2007
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29. Degomagem de miscela de oleo bruto de soja utilizando membranas de ultrafiltração sob diversas condições de pressão e velocidade. / Soybeans crude oil miscella degumming utilizing ceramic membranes: transmembrane pressure and velocity effects.
The traditional degumming process removes mainly the phospholipids presents in the crude soybean oil by the precipitation and hydration, followed by agitation and separation by centrifugation. The removal of phospholipids using membranes separation is a process that has received much attention on the part from some researchers for presenting oils of better q
Publicado em: 2007
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30. Study of cost minimization of separation process of a multi components gas mixtures through the hollow fiber membrane / Estudo da minimização do custo de um processo de separação de misturas gasosas multicomponentes atraves da membrana de fibra oca
The separation of gas mixtures is made under the objective of obtaining one or more representatives in the highly pure form. Four methods can be used in gas separation: absorption, adsorption, distillation cryogenics and membranes. The economy of the process will determine which method will be used in a specific application (Scott, 1995). The modem era of ga
Publicado em: 2006
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31. Recuperação dos componentes do aroma de café por pervaporação / Recovery of coffee aroma compounds by pervaporation process
At present, Brazil is the first world coffee producer sharing 30% of the international producer market and occupies second rank of the consumer market. Pervaporation is a membrane separation process where liquid mixtures are fractionated due to partial vaporization of its components through a dense selective membrane. Pervaporation is more advantageous than
Publicado em: 2006
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32. Avaliação do processo de extração de fenilalanina com Adogen 464 pela técnica de membranas líquidas sufartantes.
In this work, the process efficiency of surfactant liquid membranes applied to phenylalanine extraction from synthetic aqueous solutions was evaluated. A study of the effects of relevant parameters on the system behavior was carried out in order to establish appropriate conditions of extraction. The aim was to use these conditions as an experimental basis to
Publicado em: 2006
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33. Avaliação da técnica de eletrodiálise para a separação de ácido lactobiônico produzido por via biotecnológica
Glicose-fructose oxidoreductase (GFOR) and glicono-d-lactonase (GL) enzymes are present in Zymomonas mobilis bacteria cells. These enzymes are capable to catalyze lactobionic acid (AL) formation (or formation of its correspondent salts) together with sorbitol from lactose and fructose. Lactobionic acid and sodium lactobionate have important applications in m
Publicado em: 2006
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34. Análises do proteoma de raízes de cana-de-açúcar e da expressão de uma peroxidase apoplástica responsiva à micorriza arbuscular / Analysis of the sugarcane roots proteome and expression of an arbuscular mycorrhizaresponsive apoplastic peroxidase
Arbuscular mycorrhizae (AM) are symbiotic associations between fungi of the phylum Glomeromycota and most of the plant species. Even though the molecular mechanisms controlling the colonization process and AM development are largely unknown, proteins with differential accumulation in AM may have important regulatory roles. The aim of this work was to detect,
Publicado em: 2006
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35. Modeling and simulation of the pervaporation process for separating azeotropic mixtures / Modelagem e simulação do processo de pervaporação na separação de misturas azeotropicas
In this work, a study of the potential of pervaporation process for the separation of azeotropic mixtures was carries out. Two mathematical models were chosen from the literature for pervaporation process based on solution diffusion mechanism and a study, an evaluation and a comparison between these models were made. Two computational programs were developed
Publicado em: 2005
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36. Recuperação de solvente em miscelas oleo de soja/hexano utilizando tecnologia de membranas. / Soja/hexano solvent oil recovery in miscelas using technology of membranes.
Soybean oil is industrially obtained by hexane extraction, producing an oil/hexane miscella that is submitted to distillation for solvent recovery. The process with membranes present low energy consumption and have been proposed to replace or complete the traditional operations in removal of solvent. Furthermore, the use of this technology might result in co
Publicado em: 2005