Дисертації з теми "Phase rule and equilibrium"
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Chu, Jennifer Hsing-chung. "Phase behavior and binary interaction energies of copolymer blends /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Sankarasubramanian, R. "Symmetry-Breaking Transitions In Equilibrium Shapes Of Coherent Precipitates." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/191.
Sankarasubramanian, R. "Symmetry-Breaking Transitions In Equilibrium Shapes Of Coherent Precipitates." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/191.
Billman, John Frederick. "Structure and phase behavior in microemulsions /." Thesis, Connect to this title online; UW restricted, 1990. http://hdl.handle.net/1773/9825.
Hong, Seung-pyo. "Role of hydrocarbon structures in gas solvent + hydrocarbon multiphase equilibria /." Access abstract and link to full text, 1992. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9303400.
Maeda, Nobuo. "Phase transitions of long-chain n-alkanes at interfaces." View thesis entry in Australian Digital Theses Program, 2001. http://thesis.anu.edu.au/public/adt-ANU20011203.151921/index.html.
Variankaval, Narayan. "Structure and thermodynamics of associating solutions : prediction of phase equilibria." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/8304.
Bhansali, Anil P. "Heat transfer resulting from a turbulent, submerged jet impinging on a phase change material." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/19568.
Bush, David Martin. "Phase equilibria of solid-supercritical carbon dioxide solutions." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/12075.
Smith, Richard Lee Jr. "Measurement and correlation of critical states." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/10099.
Sommacal, Silvano. "Computational petrology : subsolidus equilibria in the upper mantle /." View thesis entry in Australian Digital Theses Program, 2004. http://thesis.anu.edu.au/public/adt-ANU20050415.151025/index.html.
D'Souza, Rupert. "Separation of fructose from glucose using supercritical solvents." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/21530.
Chandler, Karen. "Phase equilibria of alkanes in supercritical carbon dioxide determined from chromatographic data." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/11160.
Du, Rand Marlie. "High pressure fluid phase equilibria." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51789.
ENGLISH ABSTRACT: Supercritical extraction is being investigated as a possible alternative to the processes currently used in the fractionation of paraffinic waxes. By removing the lighter carbon fractions from the wax, the wax hardness will be improved and its melting temperature range reduced, hence improving the performance of the wax product in certain applications. In order to evaluate and operate such an extraction process optimally, it is necessary to have a thermodynamic model that accurately represents the process system. There are, however, currently no predictive models available for these systems. In order to fit present models to the systems, accurate phase equilibrium data of the supercritical solvent - n-alkane systems are needed. Unfortunately, the amount of reliable published data on these systems in the required operating range is very limited. A view cell was designed and developed with which these high pressure equilibria could be studied. The binary phase equilibria of supercritical CO2 with n-CI2, n-CI6, n-C20, n-C24, n-C28 and n-C36 and of supercritical ethane with n-CI6, n-C24 and n-C28 were measured in the temperature range 313 - 367 K. It was found that the systems with these two solvents have very different types of phase behaviour. The n-alkane solubility is much higher in ethane, but supercritical CO2 will provide a much better degree of control over the selectivity achieved in an extraction process. Of the various equations of state investigated, it was found that the Patel Teja equation of state provided the best fit of the CO2 - n-alkane systems and that the Soave-Redlich- Kwong equation fitted the ethane - n-alkane systems the best. The interaction parameters of both these equations of state display a functional relationship with temperature and nalkane acentric factor, making it possible to determine parameter values for application at other operating temperatures and with other n-alkane systems. It was found that the current equations of state were not able to represent the phase equilibria accurately over the entire range of operating conditions. The poor performance of the equations of state can be attributed to inherent flaws in the existing equations of state.
AFRIKAANSE OPSOMMING: Superkritiese ekstraksie word tans ondersoek as 'n moontlike altematief vir die prosesse wat huidiglik gebruik word om paraffiese wasse te fraksioneer. Die Iigter koolstofwasse word verwyder om die washardheid te verhoog en die temperatuurgebied waaroor die was smelt te verklein. Dit verbeter dan die was se kwaliteit en werkverrigting. Modelle wat die superkritiese ekstraksie proses akkuraat kan voorstel word egter benodig om die ekstraksie proses te kan evalueer en optimaal te bedryf. Daar is tans geen modelle beskikbaar wat die proses direk kan voorstel nie. Akkurate fase-ewewigsdata word benodig om bestaande modelle aan te pas vir gebruik in hierdie sisteme. Daar is egter baie min betroubare faseewewigsdata vir die superkritiese oplosmiddel - n-alkaan sisteme beskikbaar in die literatuur. 'n Sig-sel, waarrnee hierdie hoe druk data gemeet kan word, is ontwerp en ontwikkel. Die volgende binere fase ewewigte is in die temperatuur gebied 313 - 367 K gemeet: superkritiese CO2 met n-CI2, n-CI6, n-C20, n-C24, n-C28 en n-C36, en superkritiese Etaan met n-CI6, n-C24 en n-C28. Daar is gevind dat hierdie twee superkritiese oplosmiddelsisteme verskillende tipes fase-ewewigsgedragte openbaar. Die n-alkane het 'n baie boer oplosbaarheid in Etaan, maar deur superkritiese C02 in 'n ekstraksie kolom te gebruik, sal tot beheer oor die selektiwiteit van die ekstraksieproses lei. Uit die verskillende toestandsvergelykings wat ondersoek is, is daar gevind dat die Patel- Teja vergelyking die CO2 sisteme die beste kon beskryf en dat die Soave-Redlich-Kwong vergelyking die beste vergelyking was om die Etaan sisteme mee te modelleer. Beide die toestandsvergelykings se interaksie parameters het 'n funksionele verband met temperatuur en die n-alkaan asentrise faktor getoon. Dit is dus moontlik om waardes vir die parameters vir sisteme by ander temperature en met ander n-alkaan tipes te bepaal. Daar was gevind dat die bestaande toestandsvergelykings nie die die fase-ewewigte oor die hele eksperimenele gebied akkuraat kon voorstel nie. Dit kan toegeskryf word aan foute wat inherent is aan die vergelykings.
Fulakis, Chris. "A theoretical analysis of combined melting and vaporization using the boundary element method." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09052009-040759/.
Fall, David J. "An experimental study of the phase equilibria behavior of binary mixtures containing carbon dioxide and hydrocarbons /." Access abstract and link to full text, 1985. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/8506426.
Estrera, Susana Santos. "Multiphase equilibria thermodynamics in prototype rich gas + hydrocarbon mixtures /." Access abstract and link to full text, 1987. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/8801650.
Fall, Jaimie Linn. "Multiphase equilibria in binary and ternary hydrocarbon systems containing carbon dioxide /." Access abstract and link to full text, 1985. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/8603795.
Sukhadia, Tejas. "Prediction of phase equilibria in solutions : an associative reformulation of thermodynamic theories of solutions." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/11886.
Smith, Vicky S. "Solid-fluid equilibria in natural gas systems." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/10095.
Janert, Philipp Klaus. "Phase behavior of homopolymer/diblock blends /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/9763.
Jangkamolkulchai, Adisak. "The occurrence and influence of multiple fluid phases in the phase of equilibria of CO2and rich gas-hydrocarbon systems /." Access abstract and link to full text, 1988. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/8809460.
Miller, Melanie Marie. "Multiphase equilibria behavior of carbon dioxide and ethane + hydrocarbon binary and ternary mixtures /." Access abstract and link to full text, 1988. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/8825490.
Wang, Xichun. "Application of MPCM slurry with cooled ceiling to realize a low energy building design." online access from Digital Dissertation Consortium, 2008. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?3341125.
Hansson, Robert. "Phase equilibria of zincite containing systems relevant to zinc/lead smelting /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe19174.pdf.
Narasigadu, Caleb. "Design of a static micro-cell for phase equilibrium measurements : measurements and modelling." Paris, ENMP, 2011. https://pastel.hal.science/pastel-00679369.
This study covers the design of a new apparatus that enables reliable vapour pressure and equilibria measurements for multiple liquid and vapour phases of small volumes (a maximum of 18 cm3). These phase equilibria measurements include: vapour-liquid equilibrium (VLE), liquid-liquid equilibrium (LLE) and vapour-liquid-liquid (VLLE). The operating temperature of the apparatus ranges from 253 to 473 K and the operating pressure ranges from absolute vacuum to 1600 kPa. The sampling of the phases is accomplished using a single Rapid-OnLine-Sampler-Injector (ROLSITM). A novel technique is used to achieve sampling for each phase. The technique made use of a metallic rod in an arrangement to compensate for volume changes during sampling. As part of this study, vapour pressure and phase equilibrium data were measured to test the operation of the newly developed apparatus. New experimental vapour pressure and VLE data were also measured for systems of interest to petrochemical companies. The experimental vapour pressure data obtained were regressed using the extended Antoine and Wagner equations. The experimental VLE data measured were regressed with thermodynamic models using the direct and combined methods. For the direct method the Soave-Redlich-Kwong and Peng-Robinson equations of state were used with the temperature dependent function (α) of Mathias and Copeman (1983). For the combined method, the virial equation of state with the second virial coefficient correlation of Tsonopoulos (1974) was used together with one of the following liquid-phase activity coefficient model: TK-Wilson, NRTL and modified UNIQUAC. Thermodynamic consistency testing was also performed for all the VLE experimental data measured where almost all the systems measured showed good thermodynamic consistency for the point test of Van Ness et al. (1973) and direct test of Van Ness (1995)
Mirabelli, Thomas G. "The effect of gravity on the evolution of pore and grain structure during liquid-phase sintering." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/20021.
Oh, Minseok. "Growth kinetics of intermetallic phases in the Cu-Sn binary and the Cu-Ni-Sn ternary systems at low temperatures." access full-text online access from Digital Dissertation Consortium, 1994. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?9513132.
Swanson, Karl. "Analytical modeling of thermal storage systems for high power density portable electronics." abstract and full text PDF (free order & download UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1460783.
Lam, Daniel H. "Multiphase equilibrium behavior of ethane, nitrous oxide and carbon dioxide + n-alkanol binary and ternary mixtures /." Access abstract and link to full text, 1990. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9034205.
Tewari, Asim. "Effect of micro-gravity on the microstructural evolution during liquid phase sintering." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/18969.
Nascimento, Barreto Maria do. "Modulated structures." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670400.
Gendron, François-Xavier. "Contribution à la discrimination chirale à l'état solide et accès aux énantiomères pures par cristallisation." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMR032/document.
The need for access to pure enantiomers has largely increased since the nineties. Processes using crystallization are often cheaper and as efficient as other processes. Thus, the improvement of existing techniques and the need for new processes are attractive for scientist and industry. Two studies have been performed in this thesis:The first one concerns the improvement of an existing technique. Indeed, conglomerate Preferential Crystallization efficiency is well known. Nonetheless, its application to mirror image partial solid solutions is more difficult. Here is presented the first example of PC performed on a complete solid solution at high temperature which shows a solid solutions demixion at low temperature: the baclofen hydrogenomaleate salt (an API). Moreover, it is the first experimental observation of such phase equilibria and PC of mirror image solid solutions whose results are comparable to classical PC. -The second topic did not involve directly enantiomer separation but promising chiral discriminations have been obtained. The phase diagram between the racemic composition of two couples of atropisomers has been defined. Beside multiples equilibria observed, two results concerning the chiral discrimination can be highlighted: the first one is the possibility to deracemize a compound A initially not discriminated (racemic compound) inside the matrix of a compound B (which forms a stable conglomerate). The second is the observation of a new kind of chirality: Chirality Induced by Dissymmetric Distribution (CIDD)
Mäder, Urs Karl. "Carbon dioxide and carbon dioxide-water mixtures : |b P-V-T properties and fugacities to high pressure and temperature constrained by thermodynamic analysis and phase equilibrium experiments." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30629.
Science, Faculty of
Earth, Ocean and Atmospheric Sciences, Department of
Graduate
Veatch, Sarah Louise. "Liquid immiscibility in model bilayer lipid membranes /." Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/9772.
Tran, Thao T. "Acetone planar laser-induced fluorescence and phosphorescence for mixing studies of multiphase flows at high pressure and temperature." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24737.
Committee Chair: Seitzman, Jerry; Committee Member: Jagoda, Jechiel; Committee Member: Lieuwen, Tim; Committee Member: Menon, Suresh; Committee Member: Tan, David.
Gupta, Niraj. "First Principles Study of Metastable Beta Titanium Alloys." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc804949/.
Allanson, Oliver Douglas. "Theory of one-dimensional Vlasov-Maxwell equilibria : with applications to collisionless current sheets and flux tubes." Thesis, University of St Andrews, 2017. http://hdl.handle.net/10023/11916.
Benages, Vilau Raúl. "Growth, Morphology and Solid State Miscibility of Alkali Nitrates." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/129370.
Wylock, Christophe. "Contribution à l'étude des transferts de matière gaz-liquide en présence de réactions chimiques." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210257.
Dans ces colonnes, une phase gazeuse contenant un mélange d’air et dioxyde de carbone (CO2) est dispersée sous forme de bulles dans une solution aqueuse de carbonate et de bicarbonate de sodium (respectivement Na2CO3 et NaHCO3). Cette dispersion donne lieu à un transfert de CO2 des bulles vers la phase liquide. Au sein des colonnes, la phase gazeuse se répartit dans deux populations de bulles :des petites bulles (diamètre de quelques mm) et des grandes bulles (diamètre de quelques cm). Le transfert bulle-liquide de CO2 est couplé à des réactions chimiques prenant place en phase liquide, qui conduisent à la conversion du Na2CO3 en NaHCO3. Une fois la concentration de saturation dépassée le NaHCO3 précipite sous forme de cristaux et un mélange liquide-solide est recueilli à la sortie de ces colonnes.
Ce travail, réalisé en collaboration avec la société Solvay, porte sur l’étude et la modélisation mathématique des phénomènes de transfert de matière entre phases, couplés à des réactions chimiques, prenant place au sein d’une colonne BIR. L’association d’études sur des colonnes à bulles à l’échelle industrielle ou réduite (pilote) et d’études plus fondamentales sur des dispositifs de laboratoire permet de développer une meilleure compréhension du fonctionnement des colonnes BIR et d’en construire un modèle mathématique détaillé.
L’objectif appliqué de ce travail est la mise au point d’un modèle mathématique complet et opérationnel d’une colonne BIR. Cet objectif est supporté par trois blocs de travail, dans lesquels différents outils sont développés et exploités.
Le premier bloc est consacré à la modélisation mathématique du transfert bulle-liquide de CO2 dans une solution aqueuse de NaHCO3 et de Na2CO3. Ce transfert est couplé à des réactions chimiques en phase liquide qui influencent sa vitesse. Dans un premier temps, des modèles sont développés selon des approches unidimensionnelles classiquement rencontrées dans la littérature. Ces approches passent par une idéalisation de l’écoulement du liquide autour des bulles. Une expression simplifiée de la vitesse du transfert bulle-liquide de CO2, est également développée et validée pour le modèle de colonne BIR.
Dans un second temps, une modélisation complète des phénomènes de transport (convection et diffusion), couplés à des réactions chimiques, est réalisée en suivant une approche bidimensionnelle axisymétrique. L’influence de la vitesse de réactions sur la vitesse de transfert est étudiée et les résultats des deux approches sont également comparés.
Le deuxième bloc est consacré à l’étude expérimentale du transfert gaz-liquide de CO2 dans des solutions aqueuses de NaHCO3 et de Na2CO3. A cette fin, un dispositif expérimental est développé et présenté. Du CO2 est mis en contact avec des solutions aqueuses de NaHCO3 et de Na2CO3 dans une cellule transparente. Les phénomènes provoqués en phase liquide par le transfert de CO2 sont observés à l’aide d’un interféromètre de Mach-Zehnder.
Les résultats expérimentaux sont comparés à des résultats de simulation obtenus avec un des modèles unidimensionnels développés dans le premier bloc. De cette comparaison, il apparaît qu’une mauvaise estimation de la valeur de certains paramètres physico-chimiques apparaissant dans les équations de ce modèle conduit à des écarts significatifs entre les grandeurs observées expérimentalement et les grandeurs estimées par simulation des équations du modèle.
C’est pourquoi une méthode d’estimation paramétrique est également développée afin d’identifier les valeurs numériques de ces paramètres physico-chimiques sur base des résultats expérimentaux. Ces dernières sont également discutées.
Dans le troisième bloc, nous apportons une contribution à l’étude des cinétiques de précipitation du NaHCO3 dans un cristallisoir à cuve agitée. Cette partie du travail est réalisée en collaboration avec Vanessa Gutierrez (du service Matières et Matériaux de l’ULB).
Nous contribuons à cette étude par le développement de trois outils :une table de calcul Excel permettant de synthétiser les résultats expérimentaux, un ensemble de simulations de l’écoulement au sein du cristallisoir par mécanique des fluides numérique et une nouvelle méthode d’extraction des cinétiques de précipitation du NaHCO3 à partir des résultats expérimentaux. Ces trois outils sont également utilisés de façon combinée pour estimer les influences de la fraction massique de solide et de l’agitation sur la cinétique de germination secondaire du NaHCO3.
Enfin, la synthèse de l’ensemble des résultats de ces études est réalisée. Le résultat final est le développement d’un modèle mathématique complet et opérationnel des colonnes BIR. Ce modèle est développé en suivant l’approche de modélisation en compartiments, développée au cours du travail de Benoît Haut. Ce modèle synthétise les trois blocs d’études réalisées dans ce travail, ainsi que les travaux d’Aurélie Larcy (du service Transferts, Interfaces et Procédés de l’ULB) et de Vanessa Gutierrez. Les équations modélisant les différents phénomènes sont présentées, ainsi que la méthode utilisée pour résoudre ces équations. Des simulations des équations du modèle sont réalisées et discutées. Les résultats de simulation sont également comparés à des mesures effectuées sur une colonne BIR. Un accord raisonnable est observé.
A l’issue de ce travail, nous disposons donc d’un modèle opérationnel de colonne BIR. Bien que ce modèle doive encore être optimisé et validé, il peut déjà être utilisé pour étudier l’effet des caractéristiques géométriques des colonnes BIR et des conditions appliquées à ces colonnes sur le comportement des simulations des équations du modèle et pour identifier des tendances.
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The refined sodium bicarbonate is produced by the Solvay company using large size bubble columns, called the BIR columns.
In these columns, a gaseous phase containing an air-carbon dioxyde mixture (CO2) is dispersed under the form of bubbles in an aqueous solution of sodium carbonate and sodium bicarbonate (Na2CO3 and NaHCO3, respectively). This dispersion leads to a CO2 transfer from the bubbles to the liquid phase. Inside these columns, the gaseous phase is distributed in two bubbles populations :small bubbles (a few mm of diameter) and large bubbles (a few cm of diameter).
The bubble-liquid CO2 transfer is coupled with chemical reactions taking places in the liquid phase that leads to the conversion of Na2CO3 to NaHCO3. When the solution is supersaturated in NaHCO3, the NaHCO3 precipitates under the form of crystals and a liquid-solid mixture is extracted at the outlet of the BIR columns.
This work, realized in collaboration with Solvay, aims to study and to model mathematically the mass transport phenomena between the phases, coupled with chemical reactions, taking places inside a BIR column. Study of bubble columns at the industrial and the pilot scale is combined to a more fundamental study at laboratory scale to improve the understanding of the BIR columns functioning and to develop a detailed mathematical modeling.
The applied objective of this work is to develop a complete and operational mathematical modeling of a BIR column. This objective is supported by three blocks of work. In each block, several tools are developed and used.
The first block is devoted to the mathematical modeling of the bubble-liquid CO2 transfer in an NaHCO3 and Na2CO3 aqueous solution. This transfer is coupled with chemical reactions in liquid phase, which affect the transfer rate.
In a first time, mathematical models are developed following the classical one-dimensional approaches of the literature. These approaches idealize the liquid flow around the bubbles. A simplified expression of the bubble-liquid CO2 transfer rate is equally developed and validated for the BIR column model.
In a second time, a complete modeling of the transport phenomena (convection and diffusion) coupled with chemical reactions is developed, following an axisymmetrical twodimensional approach. The chemical reaction rate influence on the bubble-liquid transfer rate is studied and the results of the two approaches are then compared.
The second block is devoted to the experimental study of the gas-liquid CO2 transfer to NaHCO3 and Na2CO3 aqueous solutions. An experimental set-up is developed and presented. CO2 is put in contact with NaHCO3 and Na2CO3 aqueous solutions in a transparent cell. The phenomena induced in liquid phase by the CO2 transfer are observed using a Mach-Zehnder interferometer.
The experimental results are compared to simulation results that are obtained using one of the one-dimensional model developed in the first block. From this comparison, it appears that a wrong estimation of some physico-chemical parameter values leads to significative differences between the experimentally observed quantities and those estimated by simulation of the model equations. Therefore, a parametric estimation method is developed in order to estimate those parameters numerical values from the experimental results. The found values are then discussed.
In the third block is presented a contribution to the NaHCO3 precipitation kinetic study in a stirred-tank crystallizer. This part of the work is realized in collaboration with Vanessa Gutierrez (Chemicals and Materials Department of ULB).
Three tools are developed :tables in Excel sheet to synthetize the experimental results, a set of simulations of the flow inside the crystallizer by Computational Fluid Dynamic (CFD) and a new method to extract the NaHCO3 precipitation kinetics from the experimental measurements. These three tools are combined to estimate the influences of the solid mass fraction and the flow on the NaHCO3 secondary nucleation rate.
Finally, the synthesis of all these results is realized. The final result is the development of a complete and operational mathematical model of BIR columns. This model is developed following the compartmental modeling approach, developed in the PhD thesis of Benoît Haut. This model synthetizes the three block of study realized in this work and the studies of Aurélie Larcy (Transfers, Interfaces and Processes Department of ULB) and those of Vanessa Gutierrez. The equations modeling the phenomena taking place in a BIR column are presented as the used method to solve these equations. The equations of the model are simulated and the results are discussed. The results are equally compared to experimental measurement realized on a BIR column. A reasonable agreement is observed.
At the end of this work, an operational model of a BIR column is thus developed. Although this model have to be optimized and validated, it can already be used to study the influences of the geometrical characteristics of the BIR columns and of the conditions applied to these columns on the behaviour of the model equation simulations and to identity tendencies.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
Plée, Vincent. "Prédiction du comportement de phases et des enthalpies de mélange de gaz naturels atypiques contenant de l'argon, du monoxyde de carbone et de l'hélium." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0186/document.
The development of the predictive E-PPR78 model, based on a contribution group method, has been undertaken since ten years to predict accurately the behaviour of multi-component systems. This model lies on the Peng-Robinson equation of state with classical Van der Waals mixing rules. It uses a unique binary interaction parameter, kij, which is temperature dependant. To enable the E-PPR78 model to predict the behavior of natural gases, three new groups are added: carbon monoxide, helium and argon. It was necessary to build an experimental database, as exhaustive as possible, containing phase equilibrium and enthalpies of mixing data for binary systems formed by these groups and those defined in previous studies and present in natural gases. After a description of the classification scheme of Van Konynenburg and Scott, the E-PPR78 model is described. The third part is about the addition of the three new groups to the model. It clearly appears that the E-PPR78 model is able to predict the fluid-phase behavior of natural gases over wide ranges of temperatures and pressures
Cebola, Maria Joao Dos Reis Matos. "Phase equilibrium in gas condensates." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287214.
Antunes, Nuno Dias. "Equilibrium and non-equilibrium aspects of early universe phase transitions." Thesis, University of Sussex, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264553.
Soga, K. Geoffrey (Kenneth Geoffrey). "Equilibrium phase separation in polymer brushes." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40445.
Ho, Gutiérrez Iris V. (Iris Violeta). "Equilibrium compositions in two-phase partition." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60712.
Systems in three different classes of materials were studied. Equilibrium phase diagrams, tie-lines and plait points were generated for the ternary systems: poly(ethylene glycol)-1,000/sodium sulfate/water at 28$ sp circ$C; poly(ethylene glycol)-3,350/sodium sulfate/water at 28$ sp circ$C and 35$ sp circ$C; poly(ethylene glycol)-8,000/sodium sulfate/water at 28$ sp circ$C; poly(vinyl alcohol)/methylcellulose/water at 25$ sp circ$C; and poly(propylene glycol)/polystyrene/cyclohexane at 25$ sp circ$C. All measurements were done at 1 atm. The influence of temperature and polymer molecular weight on the shape and location of the equilibrium phase cure and the location of the critical point was analyzed for the poly(ethylene glycol)/sodium sulfate/water system.
Hook, Daniel William. "Phase transitions in quantum microcanonical equilibrium." Thesis, Imperial College London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.497906.
Elkins, Linda Tarbox. "Phase equilibrium investigation of ternary feldspars." Thesis, Massachusetts Institute of Technology, 1987. http://hdl.handle.net/1721.1/57924.
Zain, Husni K. "Phase equilibrium studies at moderate pressures." Thesis, Aston University, 1992. http://publications.aston.ac.uk/9743/.
Rafaquat, Mohammed. "Phase equilibrium studies at normal pressures." Thesis, Aston University, 1991. http://publications.aston.ac.uk/9734/.
Tavares, Cabral João Pedro Beija. "Polymer mixtures : dynamics, equilibrium & phase separation." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272209.