Heterogeneous Plate
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. BIODIESEL SYNTHESIS FROM WASTE COOKING OIL USING A VARIETY OF WASTE MARBLE AS HETEROGENEOUS CATALYSTS
Abstract The research article is based on biodiesel synthesis by the transesterification of waste cooking oil with methanol in the presence of heterogeneous catalysts prepared from different marble. Eight samples of marble were successfully converted into potential catalysts by calcination. The thermal treatment of waste marbles at 300oC-1000oC converted the
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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2. REMOVAL OF TRIBUTYL PHOSPHATE FROM AQUEOUS SOLUTIONS BY TiO2 HETEROGENEOUS PHOTOCATALYSIS SUPPORTED OVER A NEW METAL PLATE WITH KINETIC STUDY
Abstract The aim of this investigation was to study the degradation of tributyl phosphate (TBP) in aqueous solution by heterogeneous photocatalysis (UV-C/TiO2). To perform the investigation, aqueous solutions containing the contaminant were exposed to UV radiation in the absence or presence of TiO2 in suspension or supported on a Fe-Cr metal alloy plate. TBP
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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3. Two and three-dimensional morphometric analysis of trabecular bone using X-ray microtomography (µCT)
INTRODUCTION: Trabecular bones have a porous microstructure and can be modeled as linear elastic solids, heterogeneous and anisotropic. In the literature, few investigations have compared the two- dimensional (2D) and three-dimensional (3D) morphometric analyses of cancellous bone. METHODS: In this investigation eighteen cylindrical samples of cancellous bon
Rev. Bras. Eng. Bioméd.. Publicado em: 2014-06
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4. Solução da equação Sn multigrupo de transporte dependente do tempo em meio heterogêneo
In this dissertation is presented an analytical solution for the approximation SN transport equation with the time dependent power, to homogeneous plates as to heterogeneous, assuming a multigroup model with isotropic scattering. The main idea involves the following steps, in this order: construction of a solution to the equation mentioned in a homogeneous p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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5. Geoquímica de rocha total, geocronologia de u-pb e geologia isotópica de sm-nd das rochas ortognáissicas e unidades litológicas associadas da região ipameri - Catalão (Goiás)
The part of the southern Brasília Belt, Tocantins Province, exposed in central Brazil, comprises metasedimentary rocks, metavolcano-sedimentary sequences, amphibolites and intrusive granites, and a large orthogneiss belt. These units are tectonically imbricated, and vary in metamorphic grade from lower greenschist to amphibolite facies, characterized by a 7
Publicado em: 2008
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6. Aplicação de radiação UV artificial e solar no tratamento fotocatalítico de efluentes de curtume
Tannery effluents are very dangerous for the environment since they contain large amounts of dangerous and biorecalcitrant contaminants (organic matter and Cr(VI)). This paper reports the efficiency of heterogeneous photocatalysis, based on the application of solar and artificial radiation, furnished by UV lamps, using TiO2 fixed on a flat plate, in the trea
Química Nova. Publicado em: 2007-10
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7. AVALIAÇÃO DO PROCESSO FOTOCATALÍTICO NA DESINFECÇÃO DE EFLUENTES ANAERÓBIOS DE ÁGUAS RESIDUÁRIAS
This research was accomplished with the purpose of studying the acting of a process developed for environmental disinfection, contributing for disinfection of wastewaters from anaerobic treatment systems of sanitary sewers. This process used the heterogeneous photocatalysis, that consists of the oxidation of organic pollutants through the generation of radic
Publicado em: 2006
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8. Avaliação do processo fotocatalítico na desinfecção de efluentes anaeróbios de águas residuárias
This research was accomplished with the purpose of studying the acting of a process developed for environmental disinfection, contributing for disinfection of wastewaters from anaerobic treatment systems of sanitary sewers. This process used the heterogeneous photocatalysis, that consists of the oxidation of organic pollutants through the generation of radic
Publicado em: 2006
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9. Hierarchical modelling for the heat equation in a heterogeneous / Modelagem hierárquica para a equação do calor em uma placa heterogênea
Neste trabalho, estudamos a equação do calor estacionária em uma placa heterogênea tridimensional. Para a modelagem deste problema, utilizamos uma técnica de redução de dimensão conhecida por Modelagem Hierárquica. Desta forma, geramos um modelo para o problema original em um domínio bidimensional. Com o objetivo de estimar o erro de modelagem, des
Publicado em: 2006
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10. Fotocatálise heterogênea no polimento de efluentes sintéticos de curtume: alternativa para minimizar impactos ambientais
The industry is a section of the contemporary society with great pollutant potential of the environment, especially of the aquatic ecosystems. The tanning industries are big producing of dejections with significant amounts of organic matter and of chrome. The conventional processes of treatment applied those dejections, not always they possess good effective
Publicado em: 2006
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11. Nanotubos e nanobastões de oxidos e sulfetos de metais de transição obtidos via sistemas bidimensionais (lamelares) : preparação, caracterização e propriedades / Nanotubes and nanorods of transition metal oxides and sulfides obtained from bidimensional systems (layered compunds) : preparation, characteization and properties
This Thesis reports the preparation, characterization and properties of nanotubes and nanorods of transition metal oxides and sulfides obtained from bidimensional (Iamellar) structures. From the structural point view, nanotubes could be formed from bidimensional compounds by rolling its layers generating scroll-like nanotubes, or by the elimination of dangli
Publicado em: 2006
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12. Ti O IND.2 heterogeneous photocatalysis in secondary wastewater treatment / Fotocatálise heterogênea com Ti O IND.2 aplicada ao tratamento de esgoto sanitário secundário
The heterogeneous photocatalysis with Ti O IND.2 and solar radiation in secondary wastewater treatment to remove organic matter and microorganisms was investigated. A glass plate (approximate 0.48 M POT.2 ) with immobilized titanium dioxide (10 g/ M POT.2 ) was operated in different flow rates (15; 22.5 and 30 L/h) and angles in relation to horizontal (2, 12
Publicado em: 2005