Ceramic Membranes
Mostrando 13-24 de 29 artigos, teses e dissertações.
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13. Use of Natural Rubber Membranes as Support for Powder TiO2and Ag/TiO2 Photocatalysts
The purpose of this study was to synthesize TiO2-polymer composites able to act as photocatalyst membranes. TiO2 catalysts were prepared using the sol-gel method to contain 0.0, 0.5, 1.0, and 2.0 wt.% of embedded Ag particles, subsequently incorporated into natural rubber latex at a weight fraction of 15%. Samples of these ceramic powders were suspended in a
J. Braz. Chem. Soc.. Publicado em: 2016-03
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14. EFFECTS OF SINTERING TEMPERATURE ON THE PERFORMANCE OF SrSc0.1Co0.9O3-δOXYGEN SEMIPERMEABLE MEMBRANE
Abstract Our study investigates the influence of sintering temperature on the microstructure (grain size distribution, grain boundary length), electrical conductivity, and oxygen permeation properties of permeation membranes. For this purpose, SrSc0.1Co0.9O3-δ samples with different microstructures were prepared by varying the sintering temperature from 110
Braz. J. Chem. Eng.. Publicado em: 2015-09
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15. Preparation and Characterization of PA66/Alumina Composite Membrane
In this study, polymer/ceramic composite membranes were prepared and characterized. The polymer used was polyamide 66 (PA66) deposited by dip coating on the inner surface of α-alumina-based (Al2O3) microporous tube. A coating on the ceramic support surface and the formation of the selective layer was analyzed by scanning electron microscopy (SEM) in membran
Mat. Res.. Publicado em: 2015-08
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16. APLICAÇÃO DE ÓXIDOS DE FERRO NANOESTRUTURADOS COMO ADSORVENTES E FOTOCATALISADORES NA REMOÇÃO DE POLUENTES DE ÁGUAS RESIDUAIS
New techniques for treating wastewater, particularly the removal or degradation of organic pollutants and heavy metals, among other pollutants, have been extensively studied. The use of nanostructured iron oxides as adsorbent and photocatalyst for the removal of these contaminants has proved a promising approach, not only because of their high treatment effi
Quím. Nova. Publicado em: 2015-03
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17. Microwave Assisted Synthesis and Sintering of Ba0.5Sr0.5Co0.8Fe0.2O3-δ Perovskite
Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) perovskite-type oxide is currently one of the most promising materials for applications in solid-oxide fuel cells (SOFCs), protonic ceramic fuel cells (PCFCs), oxygen separation membranes, and catalytic membranes for methane conversion. BSCF powder synthesis has received considerable attention and new synthesis methods have b
Mat. Res.. Publicado em: 2015-02
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18. Current developments of mixed conducting membranes on porous substrates
The fabrication of mixed ionic-electronic conducting (MIEC) ceramic-based membranes for oxygen separation has extensively increased in the last three decades as a promising alternative of clean energy delivery. In recent years, the interest on supported MIEC membranes has increased due to their attractive properties such as higher mechanical strength and oxy
Mat. Res.. Publicado em: 22/10/2013
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19. Structural and fluid dynamic characterization of calcium carbonate-based porous ceramics
The aim of this work was to experimentally evaluate the use of calcium carbonate as a pore-generating agent in ceramic compositions. Compositions that contained 50% kaolin, 20% limestone, and different concentrations of quartz and feldspar were prepared by uniaxial pressing. Samples were heat-treated at a heating rate appropriate to induce calcium carbonate
Mat. Res.. Publicado em: 10/09/2013
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20. Estudo do desempenho do processo de microfiltração tangencial com membranas cerâmicas aplicado à retenção de bactérias e redução de sólidos suspensos de uma bebida à base de açaí / Performance study of the crossflow microfiltration process with ceramic membranes applied to the bacteria retention and suspended solids reduction of the beverage based on açai
In this doctoral research, the crossflow microfiltration process utilizing ceramic membranes was investigated aiming at the bacteria retention (Escherichia coli) and reduction of suspended solids of beverage based on açai (Euterpe oleracea Mart.). The selected commercial membranes of alfa-alumina (AL IND.2O IND.3) had nominal pore sizes of 0.8 and 1.2 müm
Publicado em: 2010
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21. Estudo experimental da microfiltração tangencial com membrana cerâmica aplicada na clarificação da vinhaça / Experimental study of cross flow microfiltration with ceramic membrane applied in clarifying the vinasse
This present work studied the process of cross flow microfiltration using tubular ceramic applied in the vinasse clarification from sugar cane, analyzing fluid dynamic features of process and the types of pore blocking applied to math models. In this research was used alfa-alumina (alfa-AL IND.2O IND. 3) ceramic membrane with pore size of 1.2 müm and 0.8 m�
Publicado em: 2010
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22. Project and manufacture of ceramic membranes way isostatic pressing and use of sucrose as porogenic agent for separation of vegetable oil/ water emulsions by tangential microfiltration / Projeto e manufatura de membranas cerâmicas via prensagem isostática para separação de emulsões óleo vegetal/água por microfiltração tangencial
Esta tese descreve o projeto e manufatura de membranas cerâmicas para separação de emulsões óleo/água. A escolha correta do material para a fabricação de membranas é importante para processos cujo desempenho depende da afinidade entre o meio poroso e o fluido. As condições de manufatura são também importantes, pois determinam a morfologia da mem
Publicado em: 2010
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23. Concentration of lycopene from watermelon juice by membrane separation processes / Concentração de licopeno de suco de melancia através de processos de separação por membranas
Watermelon (Citrullus lanatus var lanatus) is a fruit originally from Africa which has been object of scientific interest due its high lycopene content. To increase your marketing potential the watermelon has to be processed either as a fresh single strength juice or as a concentrated or pasteurized juices or still dried in order to produce a stable powder.
Publicado em: 2009
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24. 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