Liquid Vapor Equilibria
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. MEASUREMENTS AND THERMODYNAMIC MODELING OF VAPOR-LIQUID EQUILIBRIA FOR BINARY SYSTEMS OF ISOPROPYL CHLOROACETATE WITH CYCLOHEXANE, ISOPROPANOL AND BENZENE AT 101.3 kPa
Abstract In this work, the vapor-liquid equilibrium experimental data for the systems of isopropyl chloroacetate + isopropanol, isopropyl chloroacetate + cyclohexane and isopropyl chloroacetate + benzene were measured by a modified Rose-type recirculating still under the pressure of 101.3 kPa. The thermodynamic consistency of the measured data was verified
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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2. Modeling vapor liquid equilibrium of ionic liquids + gas binary systems at high pressure with cubic equations of state
Ionic liquids (IL) have been described as novel environmentally benign solvents because of their remarkable characteristics. Numerous applications of these solvents continue to grow at an exponential rate. In this work, high pressure vapor liquid equilibria for 17 different IL + gas binary systems were modeled at different temperatures with Peng-Robinson (PR
Braz. J. Chem. Eng.. Publicado em: 2013-03
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3. Determinação de parâmetros de equações de estado para líquidos iônicos a partir de dados de velocidade do som / Determination of parameters of equation of state for ionic liquids through speed of sound data
Os líquidos iônicos são compostos químicos cujas propriedades termofísicas têm sido estudadas a fim de aplicá-los em diversos processos, tais como o de separação. No caso da destilação, para realizar o projeto, otimização e a operacao do sistema, necessita-se conhecer o equilíbrio liquida-vapor, cujo calculo pode ser realizado por equações de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/06/2012
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4. Modelagem de equilíbrio líquido-líquido, líquido-vapor e líquido-líquido-vapor para sistemas binários, ternários, quaternários e pseudo-quaternários, envolvendo a produção de biodiesel / Modeling of liquid-liquid, liquid-vapor and liquid-liquid-vapor equilibria for binary, ternary, quarternay and pseudo-quaternary systems involving biodiesel production
The worldwide energy demand increases every year. This demand will reach levels that cannot be supplied by current conventional fossil fuel resources. In this context, biofuels arise as a growing primary source of energy, raising research opportunities and encouraging technology development. An important technical issue related to biofuels development is the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/01/2012
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5. Vapor-liquid equilibrium measurements for the binary system methyl acetate+ethanol at 0.3 and 0.7 MPa
This paper reports experimental data of the isobaric vapor-liquid equilibria (VLE) for the mixture methyl acetate + ethanol at 0.3 and 0.7 MPa, determined using a copper still ebulliometer. The activity coefficients obtained from the experimental data were correlated by using different thermodynamic mathematical models. All the binary systems show a positive
Brazilian Journal of Chemical Engineering. Publicado em: 2011-06
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6. Modelagem do Equilíbrio de Fases entre Hidrocarbonetos Leves e Pesados / Modeling of phase equilibrium between lght and heavy hydrocarbons
O comportamento de fases para sistemas binários com um hidrocarboneto leve e um pesado é muito importante tanto para o projeto real de um processo quanto para o desenvolvimento de modelos teóricos. Para atender a crescente demanda por informação experimental de equilíbrio de fases a altas pressões, o objetivo deste estudo é obter uma metodologia que
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/12/2009
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7. Phase equilibria of oleic, palmitic, stearic, linoleic and linolenic acids in supercritical CO2
The knowledge of the phase equilibrium is one of the most important factors to study the design of separation processes controlled by the equilibrium. Fatty acids are present in high concentration as by-products in vegetable oils but the equilibrium data involving these components is scarce. The objective of this work is the experimental determination of the
Brazilian Journal of Chemical Engineering. Publicado em: 2009-03
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8. Experimental determination of vapor-liquid equilibrium data of binary mixtures of fatty acids through Differential Scanning Calorimetry / Determinação experimental de dados de equilibrio liquido-vapor de misturas binarias de componentes de oleos vegetais atraves da calorimetria diferencial exploratoria
This work will contribute to some unpublished data of phase equilibria of compounds that form the biodiesel, which arouses the interest immediately. Vapor-liquid equilibrium (VLE) data for three binary mixtures of saturated fatty acids have been successfully measured through differential scanning calorimetry (DSC). These data are of great interest to the ind
Publicado em: 2009
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9. Modification of Sako-Wu-Prausnitz equation of state for fluid phase equilibria in polyethylene-ethylene systems at high pressures
In order to model phase equilibria at all pressures, it is necessary to have an equation of state. We have chosen the Sako-Wu-Prausnitz cubic equation of state, which had shown some promising results. However, in order to satisfy our demands, we had to modify it slightly and fit new pure component parameters. New pure component parameters have been determine
Brazilian Journal of Chemical Engineering. Publicado em: 2006-09
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10. Thermodynamic study of polymerics systems containing solvents in low concentrations / Estudo termodinamico de sistemas polimericos contendo solvente em baixas concentrações
In the present work were determined new experimental data of vapor-liquid equilibrium (VLE), of binary mixtures polymer + solvent and copolymer + solvent. The systems that were studied for polymers are: benzene + polystyrene, hexane + polystyrene, benzene + polymethylmethacrylate, benzene + polyethylmethacrylate, hexane + polyvinylchloride and water + polyvi
Publicado em: 2006
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11. Mathematical modeling of an industrial process for chlorine and caustic manufacturing using brine electrolysis aiming at its optimization. / Modelagem matemática de um processo industrial de produção de cloro e soda por eletrólise de salmoura visando sua otimização.
The present work consists on the development of a mathematical model on an industrial chlorine and sodium hydroxide production plant, aiming at the optimization of production efficiency and costs saving concerning electrical energy and vapor consumption. Two process steps were considered in the study: electrolysis and NaOH-liquor concentration by evaporation
Publicado em: 2006
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12. Experimental vapor-liquid equilibria data for binary mixtures of xylene isomers
Separation of aromatic C8 compounds by distillation is a difficult task due to the low relative volatilities of the compounds and to the high degree of purity required of the final commercial products. For rigorous simulation and optimization of this separation, the use of a model capable of describing vapor-liquid equilibria accurately is necessary. Neverth
Brazilian Journal of Chemical Engineering. Publicado em: 2005-09