Dispersion Fuels
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Aplicação de métodos não destrutivos para qualificação de combustíveis tipo dispersão de U308-Al e U3Si2-Al no reator IEA-R1 / Application of non-destructive methods for qualification of the U3O8-Al and U3Si2-Al dispersion fuels in the IEA-R1 Reactor
IPEN/CNEN-SP manufactures fuels to be used in its nuclear research reactor the IEA-R1. To qualify those fuels, it is necessary to check if they have a good performance under irradiation. As Brazil doesnt have nuclear research reactors with high neutron fluxes, or suitable hot cells for carrying out post-irradiation examination of nuclear fuels, IPEN/CNEN-SP
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/11/2011
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2. Procedimento de fabricação de elementos combustível a base de dispersão com alta concentração de urânio / Fabrication procedures for manufacturing high uranium concentration dispersion fuel elements
IPEN-CNEN/SP developed the technology to produce the dispersion type fuel elements for research reactors and made it available for routine production. Today, the fuel produced in IPEN-CNEN/SP is limited to the uranium concentration of 3.0 gU/cm3 for U3Si2-Al dispersion-based and 2.3 gU/cm3 for U3O8-Al dispersion. The increase of uranium concentration in fuel
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/11/2011
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3. AdsorÃÃo de MolÃculas Sulfuradas AromÃticas em Adsorventes Mesoestruturados à Base de SÃlica. / Adsorption of aromatic sulfur molecules on mesostructured silica adsorbents.
The demand of a larger control in the emission of pollutants from automobiles, with a reduction in the emission of sulfur, has led to an intense research effort on techniques of sulfur removal from fuels. In the last few years, adsorption is thought to be a suitable polishing technique to achieve a deep desulfurization of streams from hydrodesulfurization (H
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/02/2011
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4. Efeito da VariaÃÃo de LÃtio em Catalisadores de Ferro tendo PotÃssio e Cobre como Promotores para a SÃntese Fischer-Tropsch / EFFECT OF LITHIUM IN IRON BASED CATALYST FOR FISCHER-TROPSCH SYNTHESIS CONTAINING POTASSIUM AND COPPER AS PROMOTERS
New environmental regulations and a possible instability in the international oil market have led to a renewal interest in the Fischer-Tropsch Synthesis (FTS), which is an alternative to produce more environmental friendly fuels. The FTS is a polymerization reaction, in which syngas (H2 + CO) reacts in the presence of catalyst to produce hydrocarbons. Three
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2010
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5. Enhancing cobalt dispersion in supported Fischer-Tropsch catalysts via controlled decomposition of cobalt precursors
Fischer-Tropsch synthesis is a part of Gas-to Liquids (GTL), Biomass-to-Liquids (BTL) and Coal to Liquids (CTL) technologies, which produce alternatives clean fuels from natural gas, biomass and coal. The catalytic performance of cobalt catalysts in Fischer-Tropsch synthesis strongly depends on the size of cobalt particles in nanoscale range (6-30 nm). Cobal
Brazilian Journal of Physics. Publicado em: 2009-04
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6. Influence of vinasse application in saturated hydraulic conductivity and runoff / Influência da aplicação de vinhaça na condutividade hidráulica do solo saturado e no escoamento superficial
The production of alcohol used as fuel is increasing every year due to the need to replace the sources of fossil fuels, which is finite, and on the other hand alcohol is a renewable energy source. But the production of this fuel generates large quantities of waste and the vinasse draws most attention by its high value as fertilizer, primarily by the amount o
Publicado em: 2009
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7. Desenvolvimento de técnicas para avaliação de combustíveis nucleares tipo placa pelo método de ensaio por ultra-som
One of the most important steps in the fabrication processes of plate type nuclear fuels, intended to be used in research reactors or naval propulsion, is the development of nondestructive testing (NDT) methods and techniques for their quality assessment during fabrication and post-irradiation analysis. Those tests can contribute to detect discontinuities su
Publicado em: 2008
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8. Estudo do efeito da dopagem da alumina com CÃrio em catalisadores Pt/CeZrO2/Al2O3 na reaÃÃo de oxidaÃÃo parcial do Metano
The transformation of methane into liquid fuels has drawn a lot of attention in the last years due to both economical and environmental concerns. Currently, the main route to obtain synthesis gas from methane is the steam reforming. The major problems associated with this route are the high temperatures and pressures required. Nowadays, the partial oxidation
Publicado em: 2007
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9. Modelagem geométrica computacional das etapas de prensagem e sinterização de pastilhas e de laminação de placas combustíveis em dispersão de microesferas de (Th,25%U) O2 em matriz de aço inoxidável
Neste trabalho foi realizada a modelagem geométrica computacional das Cetapas de prensagem e sinterização da pastilha e da laminação da placa de combustível nuclear contendo microesferas de (Th,25%U)O2 dispersas em matriz de aço inoxidável com o objetivo de avaliar a distribuição destas microesferas nas diversas etapas do processamento. As regras d
Publicado em: 2005
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10. Multidimensional modelling and calculation of combustion in porous media
In contrast with household heating systems based on open combustion flames, burners based on premixed combustion in inert porous media are characterized by higher thermal efficiency and high turndown ratio allied with compacity of the units. Moreover, porous burners, where a flame is anchored inside a porous matrix, are associated with low pollutants formati
Publicado em: 2005
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11. RemoÃÃo de Enxofre da Gasolina em Coluna de Leito Fixo, com uso de Adsorventes ZeolÃticos
The emission of poisons like SOx and hydrocarbons from automotives vehicles is at the moment one of the major sources of atmospheric pollution. The SOx, for instance, is responsible for corrosion in cars, industrial facilities and acid rains. So, during the last years the environmental protection agencies have reduce drastically the levels of permitted emiss
Publicado em: 2003