Dissertations / Theses on the topic 'Équilibres liquide-liquide et liquide-vapeur'
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Giza, Jacek. "Etude de la cinétique et des équilibres liquide-vapeur et liquide-liquide-vapeur dans l'hydrolyse d'un ester lourd." Toulouse, INPT, 1990. http://www.theses.fr/1990INPT021G.
Full textMourah, Moustafa. "Modélisation des équilibres de phases liquide-liquide et liquide-vapeur des mélanges contenant de l'eau, des alcools et des hydrocarbures." Paris 13, 2009. http://www.theses.fr/2009PA132023.
Full textThis dissertation studies a ‘predictive’ thermodynamic modeling of liquid-liquid and/or liquid-vapor phase equilibria of mixtures containing methanol, ethanol and/or water (polar and associative compounds). The model used is based on a SAFT equation of state combined with a group contribution method. Nguyen-Huynh (GC-PPC-SAFT) has extended this method to polar compounds. In this study, we have applied a group contribution method proposed by Tamouza, with a predictive method to estimate the binary interaction parameter (based on the London theory). Specific parameters of these compounds have been determinated using fundamentally the liquid-liquid phase equilibria data with hydrocarbons. The binary interaction parameters have very important effect on the representation of this phase equilibria. Nevertheless, it is possible to calculate this parameter with a predictive method. This approach weakly degrades the quality of the liquid-vapor phase equilibria. The description of the mixtures containing polar and associative compounds requires to study the cross-associating effect. Finally, we tested the performance of the model GC-PPC-SAFT on ternary systems. The results can be considered promising towards a fully predictive model development
Verneau, Philippe. "Captation rapide et modélisation d'équilibres liquide-vapeur." Lyon 1, 1992. http://www.theses.fr/1992LYO10162.
Full textSever, Lionel. "Conception d'un ébulliomètre permettant la captation rapide des équilibres liquide-liquide-vapeur par turbidimétrie et mesure de tensions de vapeur dans la même cellule." Lyon 1, 1995. http://www.theses.fr/1995LYO10086.
Full textBaba-Ahmed, Abdelatif. "Appareillage pour l'étude des équilibres liquide-vapeur dans le domaine cryogénique : Conception et développement." ENSMP, 1999. http://www.theses.fr/1999ENMP0940.
Full textPauly, Jérôme. "Mesure et représentation des équilibres de phase vapeur-liquide-solide de mélanges paraffiniques sous pression." Pau, 2000. http://www.theses.fr/2000PAUU3008.
Full textHadj-Kali, Mohamed Kamel. "Application de la simulation moléculaire pour le calcul des équilibres liquide-vapeur des nitriles et pour la prédiction des azéotropes." Toulouse, INPT, 2004. http://ethesis.inp-toulouse.fr/archive/00000122/.
Full textMolecular simulation is invaluable for the prediction of thermodynamic properties for molecules for which the data are rare. Based on statistical thermodynamics, molecular simulation requires efficient sampling techniques of the system states and a precise force field that describe the energy interactions within the system. The precision of a force field conditions that of the predictions which can be closed to that of experimental measurements. Generic force fields are acknowledged by using parameters for chemical groups which compose the chemical molecules. We contribute to the development of a generic force field by optimizing Lennard Jones parameters in the Van der Waals contribution for the nitrile group. Simulations of liquid - vapor equilibria using Gibbs ensemble Monte Carlo and simulations of the condensed liquid phase using NPT simulations are carried out. The polar character of nitriles requires the electrostatic contribution through atomic charges to be considered, two population analysis MEP and Mulliken are compared. The set of Lennard Jones parameters regressed with MEP charges reproduces accurately the liquid and vapor properties of acetonitrile, better than with Mulliken charges and their associated Lennard Jones parameters. But the parameter transferability (prediction of properties of propionitrile and n-butyronitrile without adjustment of the parameters) is effective only for Mulliken charges. Criteria of parameter transferability for polar molecules are stated: coherence of the atomic charges in homologous chemical series, physical relevance of the Lennard Jones parameters. The second contribution consists in a methodology for the search of possible azeotropes for Lennard Jones fluids. It combines macroscopic criteria of chemical engineering and a sequence of Gibbs ensemble and a novel identity exchange movement developed within the Grand Canonical ensemble formalism
Brehelin, Mathias. "Analyse de faisabilité, conception et simulation de la distillation réactive liquide-liquide-vapeur : application et validation expérimentale sur la production de l'acétate de N-Propyle." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2006. http://tel.archives-ouvertes.fr/tel-00111657.
Full textLa base préalable à tout outil d'analyse de faisabilité, de conception ou de simulation d'un tel procédé requiert la détermination rapide et consistante des équilibres chimiques et entre phases. Une alternative aux approches classiques - minimisation de l'énergie libre de Gibbs et approches orientées équations - consistant à écrire un unique jeu d'équations capable de représenter toutes les combinaisons de phases possibles est proposée.
Un outil de génération et de tracé de réseaux de courbes de résidu réactif (rRCM) prenant rigoureusement en compte les équilibres liquide-liquide-vapeur réactifs (LLV) a été développé et testé sur des réactions d'estérifications en C1-C5. Une configuration faisable de production d'acétate de n-popyle par distillation réactive, bâtie sur la base d'un réseau rRCM et de travaux sur les procédés de production d'acétates, a été développée à l'aide de simulations continues~;~afin de s'assurer la qualité de cette conception, l'outil de simulation s'appuie sur des données thermodynamiques, cinétiques et pilotes expérimentales.
Deligny, Judith. "Contribution à l'étude cinétique et thermodynamique de procédés de déshydratation du triéthylène glycol et d'hydrocarbures liquides." Compiègne, 1997. http://www.theses.fr/1997COMP1080.
Full textDuran-Valencia, Cécilia. "Extraction par solvants supercritiques, mesures d'équilibre "liquide-vapeur" et modélisation." Paris, ENMP, 2001. http://www.theses.fr/2001ENMP0968.
Full textRossilhol, Nathalie. "Equilibres de phases à basse température de mélanges d'hydrocarbures légers, de méthanol et d'eau : mesures et modélisation." Lyon 1, 1995. http://www.theses.fr/1995LYO10328.
Full textBassiloua, Victor. "Comportement thermodynamique du système eau-2,5 lutidine : applications aux phénomènes d'adsorption et de mouillage aux interfaces solide-liquide et liquide-vapeur." Montpellier 2, 1992. http://www.theses.fr/1992MON20077.
Full textLambert, Jean-Pierre. "Détermination expérimentale des équilibres entre phases concernant un nouveau procédé de fabrication du méthacrylate de méthyle : modélisation par UNIFAC modifié." Compiègne, 1990. http://www.theses.fr/1990COMPD258.
Full textLucile, Floriane. "Etude thermodynamique des équilibres liquide-vapeur des systèmes complexes CO2-eau-impuretés à haute pression. Expérimentation et modélisation." Thesis, Pau, 2012. http://www.theses.fr/2012PAUU3042/document.
Full textProduction of carbon dioxide from burning fossil fuel participates in the global warming. This issue generates a growing interest for CO2 capture and storage from oxy fuel combustion. Before the sequestration step, the CO2 has to be purified from impurities. Separation processes require a good knowledge of thermodynamics properties of phase equilibria. In this context a new experimental device was designed and set up in the LaTEP to allow the study of the solubility of gas mixture involved in CO2 capture and storage processes (CO2, O2, NOx, SO2). The apparatus was, first, validated by studying the CO2-water system in the temperature range from 293.15 K to 393.15 K and at pressure up to 5 MPa. Then, the CO2-water-NaOH was studied because few data are available in the scientific literature. Experimental data obtained was compared with a model developed in this work. This model is based on a thermodynamic description of physical chemical phenomena occuring in a vapour liquid system. Two model of activity coefficient are compared (Pitzer and electrolyte-NRTL). The last step of this study is the parameter optimization for e-NRTL
Campestrini, Marco. "Étude thermodynamique des équilibres solide-liquide-vapeur : application à la cryogénie et aux unités de séparation de l’air." Thesis, Paris, ENMP, 2014. http://www.theses.fr/2014ENMP0035/document.
Full textIn the framework of the cryogenic air separation, impurities such as CO2 and N2O may solidify at the reboiler-condenser placed between the two distillation columns.The formed solid could provide an additional strength to the heat and material transfers, and increase the pressure drops in the distillation columns.Furthermore, the presence of a solid phase can promote the accumulation of light hydrocarbons which may form flammable mixtures with liquid oxygen.Therefore, the presence of solid phases must be controlled see avoided within the cryogenic air distillation process.The main issue of this thesis is to develop a suitable model for representing solid phases and their equilibrium with the liquid and vapor phases at the operating conditions of the process, and to obtain full phase diagrams which would improve the knowledge of phase equilibria and the control of the risks associated to the presence of solid phases
Colson, Didier. "Modélisation des équilibres gaz-liquide en solution diluée : caractérisation d'un réacteur triphasique et application à l'étude de la sélectivité de la synthèse de Fischer-Tropsch en phase liquide." Lyon 1, 1990. http://www.theses.fr/1990LYO10017.
Full textManero, Marie-Hélène. "Propriétés physico-chimiques et distillation des alcools gras." Toulouse 3, 1989. http://www.theses.fr/1989TOU30184.
Full textGramajo, Adolfo. "Algorithmes pour le calcul des équilibres liquide-vapeur et l'ajustement des paramètres caractérisant les fractions lourdes des fluides pétroliers." Aix-Marseille 3, 1986. http://www.theses.fr/1986AIX3A004.
Full textBellajrou, Raddoine. "Equilibres liquide-vapeur, application au système ternaire NH3-CH3NH2-H2O : tensions de vapeur et cinétiques de décomposition de N2H4, (CH3)2NNH2 et UH25." Lyon 1, 1992. http://www.theses.fr/1992LYO10030.
Full textMessabeb, Hamdi. "Caractérisation thermodynamique des équilibres liquide-vapeur des systèmes CO2 – eaux salées dans des conditions de hautes températures et hautes pressions." Thesis, Pau, 2017. http://www.theses.fr/2017PAUU3013/document.
Full textThis work was supported by Total and ‘’Agence National de la recherche’’ as a part of SIGARRR project (Simulation of the impact of annex gases co-injected with CO2 during its geological storage on the Reservoir-Rocks Reactivity. The aim of the thesis was to obtain experimental CO2 solubility data in salty aqueous solutions of sodium chloride and calcium chloride at different molalities (1, 3 and 6 mol/kg) under high temperature (323K < T < 423K) and high pressure (5 MPa < P < 20 MPa).Following a bibliographical study on experimental methods used for the carbon dioxide solubility determination, three characterization methods were tested: Aqueous phase analysis by ion chromatography Solubility estimation from mass balance, amounts of CO2 and liquid initially loaded into the cell and experimental parameters (density of liquid phase, molar volume of gas phase, and total volume of the equilibrium cell…). A liquid sample trapping in sodium hydroxide solution followed by a titrationA sensitivity study was carried out on the Solubility estimation method from mass balance. This study identified the level of accuracy of autoclave volume measurement to obtain reliable and accurate solubility data high-pressure.A sampling protocol was developed to withdraw aqueous samples and trap them into soda solution at high pressure. Two titration procedures were set up; liquid samples of CO2-H2O and CO2-H2O-NaCl systems were analyzed by potentiometric titration and samples of CO2-H2O-CaCl2 system were analyzed by conductimetric titration. 84 solubility data were obtained during this study, which include 45 new experimental data. Experimental measurement were compared to the results of simulation performed with PHREEQC software using a ‘’Pitzer.dat’’ database.The salting out effect observed was evaluated for each system under all temperature and pressure conditions
Ruffine, Livio. "Équilibres de phases à basse température de systèmes complexes CO2 - hydrocarbures légers - méthanol - eau : mesures et modélisation." Lyon 1, 2005. http://www.theses.fr/2005LYO10160.
Full textAli, Eyu-Lakinah. "Equation d'état de Sanchez-Lacombe : modélisation des propriétés thermodynamiques des corps purs et des mélanges." Aix-Marseille 3, 2005. http://www.theses.fr/2005AIX30004.
Full textA good knowledge of the thermodynamic properties of mixtures in large range temperatures and pressures is required for the design of numerous processes. Among the most encountered processes we can site : the supercritical fluid extraction, chromatography, oil field operations. . . The aim of this work is to describe phase equilibria of mixtures at high pressures using the Sanchez-Lacombe equation of state where pure parameters [epsilon]*, v* and r are estimated using the models developed for this work for heavy pure components (Rigal's group contribution method) and for light pure molecules. Once the pure parameters estimation models are recorded, we present the method used for mixture calculations. We chosed Mc Hugh and Krukonis's mixing rule. The pure parameters estimation associated to the Mc Hugh and Krukonis's mixing rule will be tested to light / light, light / heavy and heavy / heavy liquid/vapour binary systems, to a solid/vapour binary system and to a synthetic petroleum fluid. Results obtained will be compared to those obtained with the Peng-Robinson equation of state associated to classical quadratic mixing rules
Labarthe, Émilie. "Nouvelle stratégie d'élaboration de la N-aminopipéridine via l'acide hydroxylamine-O-sulfonique : synthèse, modélisation cinétique, équilibres entre phases, extraction et procédés." Lyon 1, 2008. http://www.theses.fr/2008LYO10319.
Full textLe, Métayer Olivier. "Modélisation et résolution de la propagation de fronts perméables. Application aux fronts d'évaporation et de détonation." Aix-Marseille 1, 2003. http://www.theses.fr/2003AIX11013.
Full textPetrova-Jordan, Elitsa. "Etude expérimentale et modélisation des équilibres de phases sous pression de systèmes impliquant un alcool et le dioxyde de carbone." Aix-Marseille 3, 2005. http://www.theses.fr/2005AIX30045.
Full textThis study covers the measurement of liquid-vapour phase equilibria in mixtures containing an alcohol and supercritical carbon dioxide, and the extension of a thermodynamic group contribution model to represent these equilibria. The synthetic method was used in this study to obtain new phase equilibrium data for binary systems comprising CO2 and the following alcohols : 2-undecanol, 6-undecanol, 10-undecen-1-ol and methyl-2,4-pentanediol at three temperatures : 313, 323 and 333 K. The second part of our study consisted of thermodynamic calculations using the PPR78 predictive model. This group contribution method enables the calculation of the temperature-dependent parameters kij parameters for the Peng-Robinson equation published in 1978. For pure components, the parameters of the cubic EOS are calculated using the critical parameters (Tc, Pc) and the acentric factor. For the calculation of the properties of the mixtures, the model introduces a Van Laar excess function
Biscay, Frédéric. "Modélisation moléculaire d'interfaces liquide-vapeur à haute pression et prédiction de la tension interfaciale." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2009. http://tel.archives-ouvertes.fr/tel-00725080.
Full textGabes, Yamina. "Étude de la faisabilité et mise au point d'un dispositif de mesure des équilibres liquide-vapeur : application à l'étude des solutions aqueuses d'électrolytes." Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL104N.
Full textCrampon, Christelle. "Etude en conditions supercritiques des équilibres de phases liquide-vapeur de systèmes impliquant un éthyle esther d'acide gras et le dioxyde de carbone." Aix-Marseille 3, 1999. http://www.theses.fr/1999AIX30084.
Full textRakotosaona, Rijalalaina. "Etude et modélisation des équilibres liquide/solide et solide/solide dans des mélanges binaires de n-alcanes linéaires et des mélanges multiconstituants." Vandoeuvre-les-Nancy, INPL, 2005. http://docnum.univ-lorraine.fr/public/INPL/2005_RAKOTOSAONA_R.pdf.
Full textCorrelations between thermodynamic properties and the carbon atom number of pure alkanes are established from literature data in order to carry out the phase equilibrium's modelling. The liquid and the alpha RII behave as an ideal mixture and the Wilson's model reproduce the equilibrium line between the ordered solid and the disordered one, considering the disorder of the disordered phase for consecutive n-alkane's binary mixture. For paraffinic waxes, the model of ideal solution for the liquid and alpha RII phases overestimate the wax's cloud point. However, the distribution of the liquid phase's alkanes and the wax's solidification domain can be estimated from this model. The solid phase's disorder, as well as the aromatic addition to the mixture make the wax more soluble in a solvent
Bassil, Georgio. "Gazéification de la biomasse : élimination des goudrons par lavage, étude expérimentale et modélisation." Thesis, Lyon 1, 2012. http://www.theses.fr/2012LYO10057/document.
Full textGasification of biomass is a promising thermochemical renewable energy resource. Among all biomass conversion processes, gasification by heat cogeneration / bio-SNG (Substitute Natural Gas) is the promising one. But still, one of the deadlocks to be raised is the reduction of the high level of tar present in the product gas. The objective of this work is to perform a data base which will be useful at the operation of tar removal from aqueous medium. The present work has mainly focused on the acquisition of bi and triphasic equilibrium data model molecules of tars - water - washing solvent. Such data are indeed essential for the development of the thermodynamic model for the modeling and the optimization of the washing process. Analyses of liquid phases in equilibrium have been performed by GC-FID or GC-MS. In some cases the concentration levels were particularly low (up to 10-10 mole fraction of anthracene in the aqueous phase). Reciprocal concentrations obtained and the partition coefficients which are deduced from the empirical correlation satisfy each of Hands and the Van't Hoff relationship. Liquid-liquid-vapor equilibrium of binary systems (water-extracting solvent) was studied with the static method. The concentrations of the phases in equilibrium were correlated by the NRTL and UNIQUAC models using the commercial software 'Thermodynamic Simulis'. The interaction parameters adjusted allow a good reproduction of experimental data
Mudjariana, Eny. "Détermination expérimentale des équilibres liquide-vapeur des binaires acide acrylique-éthyl-2-héxanol et acide acrylique-1 butanol : Modélisation par les modèles NTRL et UNIFAC modifié." Compiègne, 1992. http://www.theses.fr/1992COMPD492.
Full textBlondel-Telouk, Agnès. "Conception et mise au point d'un dispositif statique pour la détermination de la masse molaire moyenne de coupes pétrolières par tonométrie : étude d'équilibres liquide - vapeur de quatre systèmes binaires." Lyon 1, 1994. http://www.theses.fr/1994LYO10141.
Full textTournier, Hélène. "Etude expérimentale et modélisation des équilibres d'adsorption compétitive d'aromatiques en phase liquide sur des faujasites X et Y." Dijon, 2000. http://www.theses.fr/2000DIJOS069.
Full textElyeznasni, Nadia. "Interfaces entre liquides modèles non miscibles : étude parallèle par la dynamique moléculaire et par la méthode de la fonctionnelle de densité." Paris 12, 2007. http://www.theses.fr/2007PA120007.
Full textDue to its importance in many phenomena in chemistry and biology. We present a study of the structure in the interface between two immiscible liquids by density-functional theory and molecular-dynamics calculations. The liquids are modeled by Lennard-Jones potentials, which achieve immiscibility by supressing the attractive interaction between unlike particles. The density profiles of the liquids display oscillations only in a limited part of the simple liquid-phase diagram (density, temperature). When approaching the liquid-vapor coexistence, a significant depletion appears while the layering behavior of the density profile vanishes. By analogy with the liquid-vapor interface and the analysis of the adsorption this behavior is suggested to be strongly related to the drying transition. We present also a study of intrinsic profils by molecular dynamics to schow capillary waves effects to damp oscillatory structure in the interface between immiscible liquids
Sasse, Karim. "Détermination de faibles tensions de vapeur d'hydrocarbures lourds et corrélation des résultats par une équation d'état." Lyon 1, 1988. http://www.theses.fr/1988LYO10105.
Full textTorres, Rodriguez Miguel. "Etude et modélisation d'un réacteur membranaire appliqué à des réactions triphasiques." Lyon 1, 1993. http://www.theses.fr/1993LYO10306.
Full textGetachew, Sawaya Terufat. "Etude de systèmes biphasiques d'intérêt pétrolier : hydrocarbures peu volatils, mélanges eau-méthanol et eau-méthanol-chlorure de sodium." Lyon 1, 1998. http://www.theses.fr/1998LYO10193.
Full textDouillard, Jean-Marc. "Détermination de la structure de l'interface liquide-vapeur et interprétation quantitative de certains phénomènes de mouillage au moyen de la thermodynamique." Montpellier 2, 1990. http://www.theses.fr/1990MON20070.
Full textMay, Laurence. "Ecoulements diphasiques lors de la vidange de gaz liquéfiés initialement sous saturés. Validation par l'eau et le CFC11." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 1996. http://tel.archives-ouvertes.fr/tel-00842921.
Full textYoussef, Ziad. "Étude thermodynamique de la formation d'hydrates en absence d'eau liquide : mesures et modélisation." Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00694018.
Full textBaudu, Sylvain. "Etude expérimentale et modélisation des équilibres entre phases dans le système quaternaire réciproque H2O-UO2(NO3)2, H2O2-2HNO3, UO4." Lyon 1, 1997. http://www.theses.fr/1997LYO10350.
Full textFauteux-Lefebvre, Clémence. "Développement d'un catalyseur nickel-alumine efficace pour le reformage de diesel à la vapeur d'eau et étude du système réactionnel." Mémoire, Université de Sherbrooke, 2010. http://savoirs.usherbrooke.ca/handle/11143/1533.
Full textKhalid, Perveiz. "Effects on seismic properties of thermoelastic relaxation and liquid/vapor phase transition." Pau, 2011. http://www.theses.fr/2011PAUU3002.
Full textTwo fluid-related sources of seismic attenuation and velocity dispersion are examined: thermal relaxation, which originates from the contrasted temperature variations in the rockforming minerals and in the saturating fluid at the passage of the pressure wave, and the liquid-vapor phase transition in partially saturated rocks, which consists in vapor condensation at pressure peaks and liquid vaporization at pressure troughs. An analysis of the relaxation times shows that these processes are relevant in the seismic frequency band and drive the effective fluid compressibility towards values higher than the unrelaxed values commonly adopted in practice, namely the adiabatic fluid compressibility in the first case, and Wood’s average of liquid and gas compressibilities in the second case. Under full thermal relaxation between fluid and mineral, i. E. , at low enough frequency, the effective fluid compressibility is equal to the average of the fluid adiabatic and isothermal compressibilities weighted respectively by the heat capacities of the fluid and the mineral. On the other hand, at the crossing of bubble point conditions, there is in the low-frequency or thermodynamic limit a discontinuous variation in fluid compressibility, whereas Wood’s average varies sharply but continuously. These features, analysed first by Landau and Lifshitz for pure fluids, hold for reservoir fluids as well. In these two relaxation processes, the difference in fluid bulk modulus between the unrelaxed and relaxed regimes, which is directly related to P-wave velocity dispersion, can be as large as 0. 5–1 GPa, depending on the fluid type and gas saturation
Topalis, Panayotis. "Contribution au développement du simulateur de procédés ProSim et mise en oeuvre pour la conception optimale des appareils de revalorisation énergétique." Toulouse, INPT, 1986. http://www.theses.fr/1986INPT040G.
Full textDelepine, Hervé. "Détermination des coefficients de partage du benzène et du tétrahydrothiophène à l'état de traces entre phase gazeuse et phase aqueuse dans les conditions de stockage du gaz naturel." Lyon 1, 2001. http://www.theses.fr/2001LYO10203.
Full textMarounina, Nadejda. "Rôle d’un océan global et des impacts cométaires sur la formation et l’évolution d’une atmosphère sur Titan primitif." Nantes, 2015. http://archive.bu.univ-nantes.fr/pollux/show.action?id=12c471cb-626b-4dd9-86fa-7c6589cc58e4.
Full textEvents occurred during Titan's primitive history constrained the later evolution of its atmosphere, leading to its present-day mass and a N2-rich composition. The purpose of this thesis is to investigate the fate of Titan's atmosphere during two specific epochs of Titan's primitive history: the formation of a primitive atmosphere at the end of the accretion and its the evolution by impact during the Late Heavy Bombardment (LHB) event. Firstly, we show that the emergence by impact of a N2-dominated atmosphere during the LHB is improbable. Indeed, the atmospheric erosion by impact is a dominating mechanism during the LHB and pre-LHB atmospheres should be at least 5 times more massive than at present, in order to sustain an atmosphere equivalent to the present-day one. In a second time, we investigate the emergence of the primitive atmosphere on Titan after the formation of the satellite, when the impact heating was strong enough to melt the icy surface of the satellite and form a global ocean in contact with the atmosphere. In order to estimate the size and chemical composition of this atmosphere, we model the vapor-liquid equilibrium for the CO2-NH3-H2O and CH4-CO2-NH3-H2O systems that are representative of Titan's primordial composition. This model is also applied to the water-rich exoplanets up to 5 terrestrial masses, where similar configuration are likely to be found. Our calculations show that if the ratio of concentrations NH3/CO2 > 1 in the ocean, CO2 partial pressures in the atmospheres remain low
Kuswandi, M. "Procédés de séparation en milieu dispersé : régénération du triéthylène glycol par extraction de l'eau à l'aide d'un brouillard. Etude sur pilote et simulation. Séparation d'hydrocarbures par membranes liquides émulsionnées." Compiègne, 2000. http://www.theses.fr/2000COMP1275.
Full textGhanem, Ghanem. "Etude d'isothermes de solubilité sous pression [-30 à 50 °C, 1 à 60 bar] d'un odorisant du gaz naturel, le tétrahydrothiophène (THT) dans N2, CH4 ou CO2 et de ces gaz dans cet odorisant." Lyon 1, 1996. http://www.theses.fr/1996LYO10099.
Full textZoghaib, Maria. "Étude et simulation de méthodes de refroidissement des bandes d'acier défilantes." Paris, ENMP, 2010. http://www.theses.fr/2010ENMP0032.
Full textThe main scope of this dissertation is to ameliorate the cooling process of the steel strips in continuous annealing and galvanizing lines. Cooling in continuous annealing and galvanizing lines is of great metallurgical interest. Insufficient cooling capacity can result in inadequate steel grades. Cooling by impinging gas jets over the steel surface is first investigated. The heat transfer rates of this process are limited on one side by the blowing device power consumption and on the other by the occurring non stationary phenomena for high impingement velocities. On one side, the blowing device configuration and blown gas properties are analyzed in order to increase the cooling rates while keeping the power consumption at its lowest. The study is undertaken throughout literature, experimental measurements, and numerical results. An optimized configuration is defined. On the other, a numerical model is developed to simulate the fluid-structure interaction that generates the detrimental oscillations of the strip. A configuration of oblique jet impingement is compared to normal impingement. It was proven to confer more stability. However, the maximum cooling rates reached by gas convection are insufficient regarding the cooling rates to obtain special steel grades. A more efficient technique based on boiling heat transfer is investigated. Due to phase change that occurs in boiling heat transfer, high heat fluxes are dissipated for small flow velocities. In order to sidestep the oxidation problems encountered with water, another liquid coolant is chosen, Pentane. For homogenous cooling patterns and savings in flow requirements, spray nozzles are used to impinge Pentane over the hot surface. An experimental bench is then set-up to characterize the cooling rates of a pentane spray for high surface temperature, i. E. Film boiling regime. The effect of the spray hydrodynamic parameters on the heat transfer process is analyzed and a correlation is developed. T he correlation predicts the evacuated heat flux from the hot surface as a function of the surface temperature and spray hydrodynamic parameters. The developed correlation is implemented in a simulation model in order to predict the cooling rate of a Pentane spray cooling section. The latter is then compared to gas jet cooling section for the same terms of reference. Aside from yielding higher cooling rates, Pentane spray cooling results in savings in power consumption
Bureau, Nathalie. "Interactions entre fluides de gisement et fluides de forage." Lyon 1, 2002. http://www.theses.fr/2002LYO10130.
Full text