Petroleum Well
Mostrando 13-24 de 177 artigos, teses e dissertações.
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13. Microstructural, thermochemistry and mechanical evaluation of self-reducing pellets using electric arc furnace (EAF) dust containing zinc for Waelz process
ABSTRACT The increment of recycling of steel using electric arc furnace and the tendency to coat of steel products with zinc, in order to prevent corrosion, has increased the proportion of galvanized scrap used worldwide in the recent years. Approximately 10 to 20 Kg/t of cast steel is generated in casting arcs. These collected dusts electric arc furnace (EA
Matéria (Rio J.). Publicado em: 19/07/2018
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14. Green polyurethane synthesis by emulsion technique: a magnetic composite for oil spill removal
Abstract After the consolidation of the Brazilian biodiesel industry, issues related to the final destination of the glycerin, the by-product from the biodiesel industrial process, drawing the attention of several researchers. There are several uses to this byproduct. Among them, the obtaining of polymers, such as polyurethane (PU), are very encouraged since
Polímeros. Publicado em: 2017-12
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15. Influence of sorbitol on mechanical and physico-chemical properties of soy protein-based bioplastics processed by injection molding
Abstract Soy Protein Isolate (SPI) has been evaluated as useful candidate for the development of protein-based bioplastic materials processed by injection molding. The influence of sorbitol (SB) as plasticizer in mechanical properties and water uptake capacity was evaluated in SPI-based bioplastics. A mixing rheometer that allows monitoring torque and temper
Polímeros. Publicado em: 08/12/2016
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16. Analysis of Maceaene and Macamide Contents of Petroleum Ether Extract of Black, Yellow, and Purple Lepidium Meyenii (Maca) and Their Antioxidant Effect on Diabetes Mellitus Rat Model
ABSTRACT Maceaene and macamide contents as well as antioxidant effect of petroleum ether extract of black maca (BM), yellow maca (YM), and purple maca (PM) on diabetes mellitus (DM) rats were investigated. The results showed that seven, six, and five analogues of macamides were identified from the petroleum ether extracts of BM, YM, and PM, respectively. BM
Braz. arch. biol. technol.. Publicado em: 27/06/2016
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17. NUMERICAL INVESTIGATION OF NON-NEWTONIAN DRILLING FLUIDS DURING THE OCCURRENCE OF A GAS KICK IN A PETROLEUM RESERVOIR
Abstract In this work, a simplified kick simulator is developed using the ANSYS® CFX software in order to better understand the phenomena called kick. This simulator is based on the modeling of a petroleum well where a gas kick occurs. Dynamic behavior of some variables like pressure, viscosity, density and volume fraction of the fluid is analyzed in the fi
Braz. J. Chem. Eng.. Publicado em: 2016-06
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18. Pesticide Residues Method Validation by UPLC-MS/MS for Accreditation Purposes
The development and validation of an analytical method for the determination of 51 pesticides in tomato using UPLC-MS/MS (ultra performance liquid chromatography coupled to tandem mass spectrometry) was performed in order to fulfill the requirements of the NBR ISO/IEC 17025:2005. The goal of the validation was to evaluate all required parameters, such as lin
J. Braz. Chem. Soc.. Publicado em: 2016-06
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19. Total Mercury Determination in Petroleum Green Coke and Oily Sludge Samples by Cold Vapor Atomic Fluorescence Spectrometry
A fast, simple and reliable method for Hg determination in green coke and oily sludge samples by atomic fluorescence spectrometry is described. Microwave digestion and extraction procedures were evaluated for highly complex samples of coke and oily sludge. The concentrations of SnCl2 and HCl to promote Hg vapor, were optimized, as well as the concentration o
J. Braz. Chem. Soc.. Publicado em: 2015-10
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20. PRODUÇÃO DO BIOMETANOL VIA GASEIFICAÇÃO DE BIOMASSA LIGNOCELULÓSICA
With rising global energy demands and the perception of an imminent lack of petroleum, a main source of energy, comes a big rush for renewable and sustainable energetic sources. In Brazil, a reasonable fraction of energy comes from biomass, a renewable source with increasing energetic potential, not only for the direct production of energy in combustion b
Quím. Nova. Publicado em: 2015-07
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21. Evaluation of antinociceptive and anti-inflammatory activities of extract and fractions of Eugenia jambolana root bark and isolation of phytoconstituents
Eugenia jambolana Lam., Myrtaceae, is a widely distributed and traditionally well known plant in India. The root bark of the plant was extracted with ethanol and then successively fractionated into petroleum ether fraction, chloroform fraction, n-butanol fraction and methanol fraction. The extract and fractions of the plant material were evaluated for the an
Rev. bras. farmacogn.. Publicado em: 20/08/2013
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22. In situ biosurfactant production and hydrocarbon removal by Pseudomonas putida CB-100 in bioaugmented and biostimulated oil-contaminated soil
In situ biosurfactant (rhamnolipid) production by Pseudomonas putida CB-100 was achieved during a bioaugmented and biostimulated treatment to remove hydrocarbons from aged contaminated soil from oil well drilling operations. Rhamnolipid production and contaminant removal were determined for several treatments of irradiated and non-irradiated soils: nutrient
Braz. J. Microbiol.. Publicado em: 2013
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23. Química Sem Fronteiras: o desafio da energia
Coal, natural gas and petroleum-based liquid fuels are still the most widely used energy sources in modern society. The current scenario contrasts with the foreseen shortage of petroleum that was spread out in the beginning of the XXI century, when the concept of "energy security" emerged as an urgent agenda to ensure a good balance between energy supply and
Quím. Nova. Publicado em: 2013
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24. Química e sustentabilidade: novas fronteiras em biocombustíveis
This contribution discusses the state of the art and the challenges in producing biofuels, as well as the need to develop chemical conversion processes of CO2 in Brazil. Biofuels are sustainable alternatives to fossil fuels for providing energy, whilst minimizing the effects of CO2 emissions into the atmosphere. Ethanol from fermentation of simple sugars and
Quím. Nova. Publicado em: 2013