Kerosene
Mostrando 25-36 de 66 artigos, teses e dissertações.
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25. Drop size in a liquid pulsed sieve-plate extraction column
The (Benzoic acid + kerosene + water) system was studied in a 5.0 cm diameter liquid pulsed liquid-liquid extraction column with a total number of 80 sieve plates. The effect of pulsation intensity, dispersed phase superficial velocity, and continuous phase superficial velocity on volume-surface mean diameter was studied. Generally, the mean drop diameter de
Brazilian Journal of Chemical Engineering. Publicado em: 2009-12
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26. Characterization of kerosene by near infrared spectroscopy. / Caracterização do querosene através da espectroscopia de infravermelho próximo.
Ensejou-se obter a caracterização do Querosene via espectroscopia de infravermelho próximo com o objetivo de se instalar um analisador NIR (Near InfraRed) na unidade de processo de destilação industrial, permitindo a otimização do processo de produção. Foi construído um banco de dados espectrais (NIR) e das propriedades: densidade D20/4oC, destila�
Publicado em: 2009
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27. Aplicação de microemulsões na solubilização de frações pesadas de petróleo
This work presents studies related to the use of microemulsions in the solubilization of heavy crude oil fractions responsible by the formation of deposits. The first stage of the work was addressed to the construction of phases diagrams, with the intention of determining the area within which the microemulsion is formed. The following systems were studied:
Publicado em: 2009
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28. DESENVOLVIMENTO DE MÉTODOS ANALÍTICOS CROMATOGRÁFICOS, ESPECTROFLUORIMÉTRICOS E ELETROFORÉTICOS PARA A DETERMINAÇÃO DE AZAARENOS BÁSICOS EM QUEROSENE DE AVIAÇÃO / DEVELOPMENT OF ANALYTICAL METHODS BASED ON CHROMATOGRAPHY, FLUORESCENCE AND ELECTROPHORESIS FOR THE DETERMINATION OF BASIC AZAARENES IN JET FUEL SAMPLES
In this work, analytical methods were developed for the selective determination of basic azaarenes. Solid phase extraction (SPE) in combination with high performance liquid chromatography with fluorescence detection (HPLCFD) has been used for the sensitive method determination of six basic azaarenes (7,8-benzoquinoline - 78BQ, 7,9-dimethylbenz[c]acridine - 7
Publicado em: 2009
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29. Efeitos da poluição atmosférica na área do Aeroporto Internacional de São Paulo - Guarulhos sobre ensaio de bioindicadores vegetais / Effects of the air pollution in the São Paulo International Airport - Guarulhos area on a vegetable bioindicators assay
O presente estudo justifica-se pelo crescente aumento da economia e conseqüentemente dos diferentes tipos de transportes para viabilizar esta economia, a exemplo do transporte aéreo que vem crescendo significativamente. Este estudo objetivou verificar um possível efeito mutagênico causado pelo combustível de aeronaves em bioindicadores vegetais As área
Publicado em: 2009
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30. RemoÃÃo de Ãcidos naftÃnicos presentes na mistura modelo de querosene de aviaÃÃo utilizando adsorventes tipo perovsquitas modificadas
In this work were prepared adsorbents of type perovsquitas La1-xMgxNiO3, where x = 0, 0.25, 0.5, 0.75, 1.0. The addition of magnesium resulted in increased basicity of the material and consequently the affinity of the acids. The adsorbents prepared materials were characterized by atomic absorption espectrofometria (AA), X-ray diffraction (XRD) measurement of
Publicado em: 2009
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31. Desarrollo de un modelo SIMCA para la clasificación de kerosinas mediante el empleo de la espectroscopía infrarroja
In the petroleum refining industry, the use of crude from several origins is frequent. This leads to a product of variable chemical composition during refining, hindering quality control. Therefore, it is important to develop classification models that help to better characterize those products. The objective of this study is to develop a SIMCA recognition p
Química Nova. Publicado em: 2008
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32. Extração líquido-líquido de urânio(VI) do colofanito de itataia (Santa Quitéria, Ceará) por extratantes orgânicos em presença de ácido fosfórico
This work describes the liquid-liquid extraction of uranium after digestion of colofanite (a fluoroapatite) from Itataia with sulfuric acid. The experiments were run at room temperature in one stage. Among the solutions tested the highest distribution coefficient (D > 60) was found for 40%vol. DEHPA (di(2-ethyl-hexyl)phosphoric acid) + 20% vol. TOPO (triocty
Química Nova. Publicado em: 2008
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33. DETERMINATION OF LEAD IN KEROSEN AND IN LUBRICATING OIL BY ANODIC STRIPPING VOLTAMMETRY USING BISMUTH-FILM ELECTRODE AND SAMPLE PREPARATION AS MICROEMULSION / DETERMINAÇÃO DE CHUMBO EM QUEROSENE E EM ÓLEO LUBRIFICANTE POR VOLTAMETRIA DE REDISSOLUÇÃO ANÓDICA USANDO ELETRODO DE FILME DE BISMUTO E MEIO MICROEMULSIONADO
In the presente work, was developed an analytical method aiming the determination of lead in kerosen and in lubricating oil. Anodic redissolution voltammetry with a bismuth-film electrode was employed by measuring the analyte in the sample microemulsions. Square-wave scanning mode (SWV) was employed and the BiFE performance was compared to the one achieved u
Publicado em: 2008
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34. The use of vegetal-based dielectric fluids in die-sink EDM processes / Utilização de fluidos dielétricos à base de óleos vegetais na usinagem por descargas elétricas por penetração
Dielectric fluids usually used in electrical discharge machining (EDM) are generally expensive, toxic and demand special storage and disposal procedures. Oil-based dielectric fluids pollute the environment and are subject to the price variations of the international market. Moreover, they are used in large quantities and discarded after short periods of time
Publicado em: 2008
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35. Capacitive microsensor for evaluation of the quality of automotive fuels. / Micro-sensor capacitivo para avaliação da qualidade de combustíveis automotivos.
This work proposes a capacitive sensor with interdigitated electrodes in order to evaluate the quality of automotive fuel. Interdigitated electrodes have some interesting features for this type of sensor. Among them, they increase the capacitance by having several capacitors in parallel, and by having a structure feasible to be manufactured by conventional m
Publicado em: 2008
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36. Reavaliação da eficiência de óleo de coco saponificado e de sua microemulsão como inibidores de corrosão em uma célula eletroquímica
An interesting development in surfactants science and technology is their application as corrosion inhibitors, since they act as protective films over anodic and cathodic surfaces. This work aims to investigate the efficiency of saponified coconut oil (SCO) as corrosion inhibitor and of microemulsified system (SCO + butanol + kerosene oil + distilled water),
Publicado em: 2008