Oil Refinery
Mostrando 13-24 de 72 artigos, teses e dissertações.
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13. Genotoxic evaluation of an industrial effluent from an oil refinery using plant and animal bioassays
Polycyclic aromatic hydrocarbons (PAHs) are genotoxic chemicals commonly found in effluents from oil refineries. Bioassays using plants and cells cultures can be employed for assessing environmental safety and potential genotoxicity. In this study, the genotoxic potential of an oil refinery effluent was analyzed by means of micronucleus (MN) testing of Alium
Genetics and Molecular Biology. Publicado em: 29/01/2010
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14. Marcadores metálicos como avaliação do impacto crônico de emissões petroquímicas em zona urbana
Nickel and vanadium were tested as tracers of oil refinery emission distribution in populated area of Rio Grande-RS. The anomalies of these elements in surface soil are considered a long-term reflection of the emissions in low atmosphere. The spatial distribution of Ni and V in the soil corresponded to the pattern of local winds. The threshold of 1.5 backgro
Química Nova. Publicado em: 2010
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15. Avaliação de biocombustível derivado do bio-óleo obtido por pirólise rápida de biomassa lignocelulósica como aditivo para gasolina
A biofuel was prepared from acid aqueous fraction (pH = 2) of bio-oil produced by fast pyrolysis (Bioware Technology) of lignocellulosic biomass (sugar cane residue) and tested in blends (2, 5, 10 e 20% v/v) with gasoline type C (common) marketed in Brazil. The specification tests made in the Refinery President Getúlio Vargas (PETROBRAS) showed increasing i
Química Nova. Publicado em: 2010
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16. Exergy and thermoeconomic evaluation of a petroleum refinery hydrogem production unit. / Produção de hidrogênio em refinarias de petróleo: avaliação exergética e custo de produção.
Pure hydrogen (H2) is an useful gas in chemical and petrochemical industries because it reacts easily with several other elements. On refineries, hydrogen is used to sequestrate sulphur from diesel and gasoline. Emission restrictions regard to fossil fuels are rising the world hydrogen demands. In spite of its abundance, hydrogen is normally found associated
Publicado em: 2010
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17. Estudo de compostos orgânicos voláteis na atmosfera da região metropolitana de Campinas / Study of volatile organic compounds in the atmosphere of metropolitan area of Campinas
This work presents a study of volatile organic compounds (VOC) found in the atmosphere of Metropolitan Area of Campinas (Campinas, SP). The first step was to perform a vehicular emissions inventory of the study area. Vehicular emissions were estimated using emission factors from new vehicles and bottom-up approach, considering different categories of vehicle
Publicado em: 2010
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18. Biodegradation of oil refinery residues using mixed-culture of microorganisms isolated from a landfarming
Neste estudo foi investigado o potencial de um inóculo composto de cultura mista de bactérias e fungos, isolados do landfarming da Refinaria de Paulínia, Brasil, em degradar resíduos oleosos gerados no processo de refinamento de petróleo. O isolamento desses microrganismos foi realizado previamente, supondo-se que estejam melhor adaptados aos hidrocarbo
Brazilian Archives of Biology and Technology. Publicado em: 2009-12
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19. CASH FLOW AT RISK ANALYSIS OF A DOWNSTREAM OIL COMPANY / ANALISE DO FLUXO DE CAIXA EM RISCO PARA UMA EMPRESA PRODUTORA DE DERIVADOS DE PETRÓLEO
This study intents to examine strategies for hedging with swaps, futures and options that reduce the impact in CF@R to a model of oil refinery. The purpose is to show the effect that financial market hedge instruments used in portfolios causes in the corporate environment. The basis for the case study is shaped by the methodology for risk analysis on non-fin
Publicado em: 2009
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20. Application of experimental design in different stages of the oil refining / Aplicação de planejamento de experimentos em diferentes etapas do refino de petroleo
In this work, experimental design technique was applied to different optimization studies, which were carried out in the Paulínia Refinery (Replan). The work covers applications of the technique in laboratorial scale, in computational tool, and the use of the technique in different industrial plants. The laboratory studies consisted in the evaluation of the
Publicado em: 2009
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21. Determinação de benzeno, tolueno, etilbenzeno e xilenos em gasolina comercializada nos postos do estado do Piauí
Automotive gasoline consists of a complex mixture of flammable and volatile hydrocarbons derived from crude oil with carbon numbers within the range of 4-12 and boiling points range of 30-225 ºC. Its composition varies with the kind of crude oil and the type of refinery process that they undergone. Aromatics hydrocarbons, in particular benzene, toluene, eth
Química Nova. Publicado em: 2009
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22. DETECÇÃO DE ESPÉCIES BACTERIANAS ENVOLVIDAS EM PROCESSOS DE BIODESSULFURIZAÇÃO EM UM SISTEMA DE LANDFARMING, NA REFINARIA GABRIEL PASSOS (REGAP), MINAS GERAIS.
The emission of sulfur from the burning of fossil fuels represents a global problem because it is the major cause of acid rain and air pollution. A major concern of the refineries is reducing the sulfur content of oil. The technology commonly used for this purpose is the hydrodesulfurization. An alternative that is being increasingly considered is biodesulfu
Publicado em: 2009
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23. Process analysis of crude oil desalting - water uses optimization. / Análise do processo de dessalgação de petróleo - otimização do uso de água.
The aim of this work is the study of the reduction of water consumption in petroleum desalting processes. The study of the attraction forces acting on the droplets was necessary to know how the emulsion water/oil is separated. A mathematical model based upon these forces was built to calculate the time between each droplets collision and to establish criteri
Publicado em: 2009
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24. Utilização de prototipo nacional de destilador molecular para caracterização de frações pesadas de petroleo / Use of national molecular distiller prototype for characterization of heavy oil fractions
The characterization through TBP (True Boiling Point) curve is one of the most common experimental techniques for determination of petroleum properties. This curve defines the yield of petroleum products as function of their true boiling points, supplying important information on decisions of refinery process control and on the quality of the produced oil. D
Publicado em: 2009