Hydrocarbons Mixtures
Mostrando 1-12 de 42 artigos, teses e dissertações.
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1. LIGHT N-PARAFFINS SEPARATION BY INVERSE GAS CHROMATOGRAPHY WITH CUBAN VOLCANIC GLASS
ABSTRACT In this work the applicability of a natural volcanic glass (technological type I material) from Cuba is investigated as adsorbent for separation of mixtures of C1-(C5; C6; C7; C8; C9) hydrocarbons by inverse gas chromatography under flow conditions in a temperature range of 328-343 K. The experimental results indicated that the material was mainly
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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2. An Examination of the Prediction of Hydrate Formation Conditions in the Presence of Thermodynamic Inhibitors
Abstract Gas hydrates are crystalline compounds, solid structures where water traps small guest molecules, typically light gases, in cages formed by hydrogen bonds. They are notorious for causing problems in oil and gas production, transportation and processing. Gas hydrates may form at pressures and temperatures commonly found in natural gas and oil product
Braz. J. Chem. Eng.. Publicado em: 2018-01
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3. Discharge of Non-Reactive Fluids from Vessels
Abstract This paper presents simulations of discharges from pressure vessels that consistently account for non-ideal fluid behavior in all the required thermodynamic properties and individually considers all the chemical components present. The underlying assumption is that phase equilibrium occurs instantaneously inside the vessel and, thus, the dynamics of
Braz. J. Chem. Eng.. Publicado em: 2017-10
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4. COMPETITION BETWEEN THE REACTION MEDIUM AND NANOSTRUCTURED ZnO IN THE PHOTOCATALYTIC DEGRADATION OF ANTHRACENE. TOWARD AN OPTIMAL PROCESS FOR POLYCYCLIC AROMATIC HYDROCARBONS REMEDIATION
Contamination with polycyclic aromatic hydrocarbons (PAHs) is considered an important health issue due to the toxicity of these compounds. Photocatalytic degradation of anthracene, a representative molecule of PAHs, using the high quantum yield semiconductor ZnO, has been reported. The solubility of anthracene in water makes necessary to use mixtures with or
Quím. Nova. Publicado em: 2017-01
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5. Comparison of the n-alkanes and polycyclic aromatic hydrocarbons concentrations in the atmosphere during the preparation of warm and hot mixtures asphalt for pavements
O asfalto é utilizado na produção de misturas asfálticas a quente (HMA) para a pavimentação e, devido às altas temperaturas empregadas, gera fumos que contêm n-alcanos e hidrocarbonetos policíclicos aromáticos (HPAs). As misturas asfálticas preparadas em temperaturas mais baixas, como as misturas asfálticas mornas (WMA), podem contribuir na redu�
J. Braz. Chem. Soc.. Publicado em: 09/08/2012
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6. DESEMPENHO EM DINAMÔMETRO E EMISSÕES RESIDUAIS DE UM MOTOR DE TRATOR AGRÍCOLA OPERANDO COM MISTURAS BINÁRIAS DE ÓLEO DIESEL B5 E BIODIESEL DE ÓLEO DE FRANGO / PERFORMANCE IN DYNAMOMETER AND EMISSIONS OF WASTE AN AGRICULTURAL TRACTOR ENGINES OPERATING WITH BINARY MIXTURES B5 DIESEL AND BIODIESEL OIL CHICKEN
Brazil, the third largest producer of biodiesel in the world, and also the third largest producer of chicken, may increase in some regions, the use of oil derived from birds, as an alternative to fossil fuels. In order to increase the range of options to reduce dependence on soybean oil for that purpose, and fostering environmental aspects, it is possible to
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
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7. Estudos em adsorÃÃo de gÃs natural: armazenamento, transporte e purificaÃÃo / Studies of Natural Gas Adsorption: Storage, Transport and Purification
The use of vessels filled with activated carbon to store and transport natural gas (NG) at moderate pressures (about 3.5 MPa) and ambient temperature (about 298 K) has been studied as a potential alternative to compressed natural gas storage at high pressures (ca. 20 MPa). The present study provides an experimental investigation of charge and discharge cycle
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2011
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8. Influência de polimorfismos em genes de metabolismo de xenobióticos e reparação de DNA no risco ocupacional de mineiros de carvão a céu aberto
Colombia has one of the world s largest coal reserves being the fifth biggest thermal coal exporter world-wide. In open-cast coal mining extraction, large amounts of dust particles and heavy metals are released into the atmosphere, where they can form complex mixtures, representing a significant health risks to occupationally exposed workers. In addition, in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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9. Contribuição ao conhecimento químico da flora acreana: Protium hebetatum Daly, Protium heptaphyllum(Aublet) Marchand subsp. ulei (Swat) Daly e Protium heptaphyllum (Aublet) Marchand subsp. heptaphyllum / Contribution to the chemical knowledge of the Acre flora: Protium hebetatum Daly, Protium heptaphyllum (Aublet) Marchand subsp. ulei (Swat) and Daly Protium heptaphyllum (Aublet) Marchand subsp. heptaphyllum
This work presents study phytochemistry of three species of plants of the family Burseraceae: Protium hebetatum Daly (PHB), Protium heptaphyllum (Aublet) Marchand subsp. ulei (Swat) Daly (PHU) and the Protium heptaphyllum (Aublet) Marchand subsp. heptaphyllum (PHH), known, at random, as pitch, pitch-white and almécego. The species were collected in the muni
Publicado em: 2010
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10. Study of the emission of the fleet of vehicles diesel and cycle Otto, without the catalytic converters in the cities of Sorocaba and Votorantim / Estudo da emissão da frota de veículos diesel e ciclo Otto, sem conversores catalíticos, nos municípios de Sorocaba e Votorantim
This study evaluates by means of a IEV - inventory of vehicle emission to propagate, the contribution of motor vehicles in air pollution in the cities of Sorocaba and Votorantim, of the emphasis to the characteristics of the fleet and the geographic position of these cities, to the impacts of these characteristics, the quantification and qualification of the
Publicado em: 2009
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11. Determinação de hidrocarbonetos majoritarios presentes no gas natural utilizando espectroscopia no infravermelho proximo e calibração multivariada / Determination of major hydrocarbons in natural gas using near infrared spectroscopy and chemometrics
Near Infrared (NIR) Spectroscopy and Chemometrics were used to construct calibration models to determine the concentration of major hydrocarbons in gas mixtures in concentrations similar to those observed in natural gas. The spectra were obtained by two different NIR spectrophotometers made in the laboratory, one employing a cell of fixed and other with vari
Publicado em: 2008
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12. Estudo experimental e numerico da dinamica de movimento de Riser em catenaria com escoamento interno / Experimental and numerical study of the motion dynamics of catenary riser considering internal flow
The pipe which transports fluids from the petroleum production well, on the seabed, up to the production unity, on the sea surface, is named riser. The main objective of this work is to characterize the dynamic response of a riser, hanging in catenary configuration, with the influence of the internal flow of hydrocarbons. It was observed from literature, tha
Publicado em: 2008