Wet Oxidation
Mostrando 13-24 de 53 artigos, teses e dissertações.
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13. Estudo experimental da combustão molhada na recuperação de oleo pesado / Experimental study of the wet combustion on heavy oil recovery
One way to improve the performance of the oil recovery method, known as dry forward in situ combustion, is to inject water either simultaneously or intermittently with the air, named as wet forward in situ combustion. The specific heat of the dry air is considerably lower than that of water, such that water may render a better transport of the heat generated
Publicado em: 2010
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14. Fabrication and characterization of tellurite and germanate waveguides for optoelectronics applications. / Produção e caracterização de guias de onda de telureto e germanato para aplicações em optoeletrônica.
The objective of this work is the production and characterization of GeO2-PbO and TeO2-ZnO waveguides. The waveguides were produced using thin films and glasses by means of different procedures. The films were produced using the RF magnetron sputtering method and characterized by a variety of techniques. In particular, scanning electron microscopy was essent
Publicado em: 2010
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15. Total catalytic wet oxidation of phenol and its chlorinated derivates with MnO2/CeO2 catalyst in a slurry
In the present work, a synthetic effluent of phenol was treated by means of a total oxidation process-Catalyzed Wet Oxidation (CWO). A mixed oxide of Mn-Ce (7:3), the catalyst, was synthesized by co-precipitation from an aqueous solution of MnCl2 and CeCl3 in a basic medium. The mixed oxide, MnO2/CeO2, was characterized and used in the oxidation of phenol in
Brazilian Journal of Chemical Engineering. Publicado em: 2009-09
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16. Copper on activated carbon for catalytic wet air oxidation
Textile industry is an important source of water contamination. Some of the organic contaminants cannot be eliminated by nature in a reasonable period. Heterogeneous catalytic wet air oxidation is one of the most effective methods to purify wastewater with organic contaminants. In this work, catalysts based on copper supported on activated carbon were synthe
Materials Research. Publicado em: 2009-03
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17. Desenvolvimento de catalisadores para reforma e oxidação combinadas do metano
In this work, we studied the effects of the promoters of support (ZrO2, La2O3, CeO2, CeO2-ZrO2, CeO2-ZrO2-La2O3 and La2O3) in the nickel catalysts supported on γ-Al2O3 were studied. The supports were prepared by wet impregnation on γ- Al2O3 (Alfa Aesar) with 10% by weight of oxides of cerium, zirconium, lanthanum, ceria-zirconia, ceria-lanthanum an
Publicado em: 2009
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18. Catalisadores de Pt suportados, obtidos pelo método solgel : efeito do cério na atividade e estabilidade nas reações de reforma do metano
The effect of Ce as a structural and electronic promoter on the activity and stability of Pt catalysts supported on Al2O3 for methane reforming reactions were investigated to elucidate the metal-support interaction. Pt/Al2O3 and Pt/CeO2-Al2O3 catalysts were prepared by conventional method of wet impregnation on commercial supports and on CeO2- Al2O3 mixed ox
Publicado em: 2009
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19. PreparaÃÃo de carvÃo ativado e impregnaÃÃo com ferro ou cromo para aplicaÃÃes em processos de descontaminaÃÃo ambiental. / Preparation and impregnation of activated carbons with iron or chromium for aplication on environmental descontamination processes.
This work has five chapters, with objective of the preparation of activated carbons (AC) from agroindustrial residues (coffee hulls and wet blue leather) and preparation of catalysts using these AC for degradation of organic compounds. In the first chapter is showed a review from the literature about AC, the surface characterisitics and properties, the uses
Publicado em: 2008
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20. Estudo da Viabilidade TÃcnica dos Processos de GeorremediaÃÃo e OxidaÃÃo Ãmida para Tratamento de Percolados de Aterros SanitÃrios (Chorume da ETP-Muribeca: Um Estudo de Caso)
Estudos experimentais foram realizados para estabelecimento de nova metodologia, ou complementaÃÃo ao processo biolÃgico de tratamento de percolados, utilizando-se amostragem de chorume bruto e de descarte da EstaÃÃo de Tratamento de Percolados (ETP) da Muribeca, JaboatÃo dos Guararapes-PE,Brasil. A escolha temÃtica contempla as principais dificuldade
Publicado em: 2008
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21. Study of nickel catalysts supported on modified ZrO2 applied in reforming reactions / Estudo de catalisadores de níquel suportados em ZrO2 modificados aplicados em reações de reforma
Zirconium dioxide is a material with physics and chemical characteristics that can be applied in many fields, as academic as industrial. In the catalysis, the interest in systems based on zirconia (ZrO2) are growing- up quickly, as a catalyst as a support, considering that ZrO2 properties can be changed by the addition of different cations. The objective of
Publicado em: 2008
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22. Atributos microbiológicos de um latossolo bruno submetido a diferentes sistemas de manejo e calagem / Soil microbiological atributtes of a brown latosol submitted to different management systems and liming
This work was conducted in Guarapuava, state of Paraná, in a southern brazilian oxisol, in a trial established in 1978. The aim of this work was to analyse the effect of different soil management systems and liming on the microbial biomass and its activity related to C and N in the soil. The managment systems evaluated were: no-tillage with lime incorporate
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2007
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23. Determinação isotópica de S (% em átomos de 34S) por espectrometria de massas em amostras de solo, a partir de S-Total e S-Sulfato disponível / Isotopic determination of S (% in atoms of 34S) by mass spectrometry in soil samples based on Total-S and available Sulphate-S
Sulphur in soil may be found under two basic forms; Inorganic-S and Organic-S. Sulphur under inorganic form (Sulphate-S) may be available to plant, however organic sulphur is responsible for 95 % of total sulphur in the most of soils. Aiming quantifies the available sulphur in soil, ammonium acetate plus acetic acid extractor solution was used. Efficiency of
Publicado em: 2007
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24. Efeito de resÃduos siderÃrgicos no cultivo de arroz inundado: comparaÃÃo de extratos e disponibilidade de elementos-traÃo.
A greenhouse experiment was conducted to study the effect of the use of iron smelter residues (metallurgical scale, filter press mud and phosphate mud) on the rice productivity (Oryza sativa L.) under wet cultivation. This experiment was undertaken in a completely randomized block design with a 3 7 factorial scheme with three replicates. A Gleysol c
Publicado em: 2007