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Hydrodynamique Et Transfert De Matiere Gaz Liquide Dans Les Melangeurs Statiques
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Book Synopsis Hydrodynamique et transfert de matière gaz-liquide dans les mélangeurs statiques by : Abderrahim Heyouni
Download or read book Hydrodynamique et transfert de matière gaz-liquide dans les mélangeurs statiques written by Abderrahim Heyouni and published by . This book was released on 2002 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'étude porte sur l'hydrodynamique et le transfert de matière gaz-liquide dans deux types de mélangeurs statiques : le mélangeur Lightnin et le mélangeur Ross. Les objectifs de l'étude sont de déterminer les paramètres caractéristiques de l'hydrodynamique et du transfert de matière gaz-liquide et d'évaluer les performances de ce type de systèmes en tant que réacteurs gaz-liquide. Les différentes paramètres qui caractérisent les performances de ce type de systèmes, à savoir, les régimes hydrodynamiques gaz-liquide, la rétention de gaz, la perte de charge, la puissance dissipee, le diamètre des bulles, l'aire interfaciale, le coefficient volumique de transfert de matière gaz-liquide ainsi que le coefficient de transfert de matière côté film liquide ont été étudiés. Les effets de la vitesse du liquide, de la vitesse du gaz, de la structure géométrique du mélangeur ont été mis en évidence. Des corrélations sont proposées pour prédire les différentes paramètres et comparées à d'autres corrélations de la littérature.
Book Synopsis Hydrodynamique et transfert de matière gaz-liquide dans un mélangeur muni de deux arbres excentrés by : François Cabaret
Download or read book Hydrodynamique et transfert de matière gaz-liquide dans un mélangeur muni de deux arbres excentrés written by François Cabaret and published by . This book was released on 2007 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Etude de l'hydrodynamique et du transfert de matière dans une colonne à garnissage by : André Laurent
Download or read book Etude de l'hydrodynamique et du transfert de matière dans une colonne à garnissage written by André Laurent and published by . This book was released on 1975 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: SYSTEMATIQUE ORIGINALE DE DETERMINATION DE LA CINETIQUE GLOBALE ET DES CONSTANTES PHYSICOCHIMIQUES, APPLIQUEE AVEC SUCCES AU SYSTEME D'OXYDATION DES SULFITES DANS DES MODELES EXPERIMENTAUX DE LABORATOIRE. ETUDE EXPERIMENTALE DE L'AIRE INTERFACIALE ET DES COEFFICIENTS DE TRANSFERT DE MATIERE DANS UNE COLONNE A GARNISSAGE A CONTRE COURANT ARROSEE. METHODE ORIGINALE DE SIMULATION DES PERFORMANCES D'UNE COLONNE A GARNISSAGE A L'AIDE D'UN MODELE EXPERIMENTAL DE LABORATOIRE; DEFINITION DES PARAMETRES DU MODELE ET APPLICATION A LA PREVISION DU TRANSFERT DE MATIERE
Book Synopsis CONTRIBUTION A L'ETUDE DE L'HYDRODYNAMIQUE ET DU TRANSFERT DE MATIERE DANS LES REACTEURS GAZ-LIQUIDE DE TYPE VENTURI A EMULSION by : SANKOUN.. TOURE
Download or read book CONTRIBUTION A L'ETUDE DE L'HYDRODYNAMIQUE ET DU TRANSFERT DE MATIERE DANS LES REACTEURS GAZ-LIQUIDE DE TYPE VENTURI A EMULSION written by SANKOUN.. TOURE and published by . This book was released on 1984 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS CE LAVEUR VENTURI, LE LIQUIDE EST ADMIS DIRECTEMENT AU COL, SANS ATOMISEUR. HYDRODYNAMIQUE : CAPACITE D'ALIMENTATION, DISTRIBUTION DE PRESSION, TAUX DE RETENTION DES PHASES. TRANSFERT DE MATIERE : AIRE INTERFACIALE, COEFFICIENT DE TRANSFERT DE MATIERE VOLUMETRIQUE. COMPARAISON DES PERFORMANCES "TRANSFERT-ENERGIE" DE CE LAVEUR AVEC CELLES D'AUTRES ABSORBEURS
Book Synopsis Hydrodynamique et transfert gaz-liquide non newtonien en fluidisation triphasique by : Touraj Tavakoli Gheynani
Download or read book Hydrodynamique et transfert gaz-liquide non newtonien en fluidisation triphasique written by Touraj Tavakoli Gheynani and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LA FLUIDISATION GAZ-LIQUIDE-SOLIDE EST ETUDIEE EXPERIMENTALEMENT DU POINT DE VUE HYDRODYNAMIQUE (VITESSE MINIMALE, EXPANSION, RETENTIONS DU LIQUIDE ET DU GAZ) ET DU POINT DE VUE TRANSFERT DE MATIERE PAR ABSORPTION D'OXYGENE. LES MESURES HYDRODYNAMIQUES SONT EFFECTUEES AVEC DIVERS LIQUIDES NEWTONIENS ET NON NEWTONIENS ET PAR ANALOGIE ON DETERMINE UNE VISCOSITE APPARENTE. PAR RAPPORT A L'EAU, L'ECOULEMENT EST PROFONDEMENT MODIFIE PAR LA COALESCENCE QUI PRODUIT UN REGIME A BULLES DEFORMEES OU A BOUCHONS. CEPENDANT, LES RETENTIONS SONT ASSEZ PEU INFLUENCEES PAR LA VISCOSITE DE MEME QUE PAR LE DIAMETRE DES PARTICULES. EN TRANSFERT DE MATIERE, LES PROFILS DE CONCENTRATION EN OXYGENE DISSOUS SONT TRAITES PAR LE MODELE A DISPERSION AXIALE ET FOURNISSENT LES COEFFICIENTS CARACTERISTIQUES, DE LA DISPERSION AXIALE ET DU TRANSFERT VOLUMETRIQUE. L'ACCROISSEMENT DE VISCOSITE SE TRADUIT ESSENTIELLEMENT PAR UNE FORTE REDUCTION DU COEFFICIENT VOLUMETRIQUE DE TRANSFERT EN RAISON DE LA REDUCTION D'AIRE INTERFACIALE. PAR CONTRE, L'INFLUENCE DE LA VITESSE DE GAZ RESTE TRES IMPORTANTE. LE MODELE PEUT ETRE AMELIORE PAR LA PRISE EN COMPTE DE LA COALESCENCE, PAR L'INTERMEDIAIRE D'UNE REDUCTION AXIALE EXPONENTIELLE DE CE COEFFICIENT VOLUMETRIQUE
Book Synopsis DETERMINATION DES PARAMETRES DE TRANSFERT DE MATIERE DANS UNE COLONNE A GARNISSAGE FONCTIONNANT SOUS PRESSION ELEVEE. CAS DES ECOULEMENTS DISPERSIF by : KARIM.. KAFOUFI
Download or read book DETERMINATION DES PARAMETRES DE TRANSFERT DE MATIERE DANS UNE COLONNE A GARNISSAGE FONCTIONNANT SOUS PRESSION ELEVEE. CAS DES ECOULEMENTS DISPERSIF written by KARIM.. KAFOUFI and published by . This book was released on 1997 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE ETUDE A POUR BUT LA DETERMINATION DES PARAMETRES DE TRANSFERT DE MATIERE, LORS DE L'ABSORPTION GAZ-LIQUIDE DANS UNE COLONNE A GARNISSAGE, EN FONCTION DE LA PRESSION DANS LE DOMAINE DE 1 A 13.10#5PA. UNE ETUDE PREALABLE DE L'HYDRODYNAMIQUE A ETE REALISEE AFIN DE CARACTERISER L'ECOULEMENT DU GAZ ET CELUI DU LIQUIDE EN FONCTION DE LA PRESSION OPERATOIRE. LA METHODE DE DISTRIBUTION DES TEMPS DE SEJOUR (DTS) A MONTRE QUE L'ECOULEMENT DES FLUIDES N'EST PAS DE TYPE PISTON PARFAIT MAIS PLUTOT UN ECOULEMENT PISTON AVEC DISPERSION AXIALE. CONTRAIREMENT A L'ECOULEMENT DU LIQUIDE, UN EFFET DE LA PRESSION SUR L'ECOULEMENT DU GAZ A ETE OBSERVE. LE COEFFICIENT DE DISPERSION AXIALE DU GAZ EST UNE FONCTION CROISSANTE DE LA PRESSION. L'IDENTIFICATION DES ECOULEMENTS AINSI FAITE, A PERMIS LA MODELISATION DE LA COLONNE A GARNISSAGE LORS DE L'ABSORPTION GAZ-LIQUIDE SOUS PRESSION ELEVEE. LES EQUATIONS DE BASE DONNANT LE PROFIL HYDRODYNAMIQUE DES DEUX FILMS GAZ ET LIQUIDE SONT COMPLETEES PAR LES TERMES TRADUISANT LE TRANSFERT DE MATIERE SUIVIE D'UNE REACTION CHIMIQUE IRREVERSIBLE EN PHASE LIQUIDE. LA RESOLUTION NUMERIQUE DU SYSTEME D'EQUATIONS AINSI OBTENU, A PERMIS L'ETUDE DE L'INFLUENCE DE LA PRESSION SUR L'AIRE INTERFACIALE LORS DE L'ABSORPTION CHIMIQUE DU DIOXYDE DE CARBONE PAR UNE SOLUTION DE SOUDE EN REGIME RAPIDE. L'ABSORPTION PHYSIQUE DU DIOXYDE DE CARBONE PAR L'EAU DE VILLE A MONTRE QUE LE COEFFICIENT DE TRANSFERT DE MATIERE COTE LIQUIDE AUGMENTE AVEC LA PRESSION OPERATOIRE.
Book Synopsis Hydrodynamique et transfert de chaleur dans un mélangeur statique Sulzer SMX avec des fluides rhéologiquement complexes by : CHRISTIAN.. FASOL
Download or read book Hydrodynamique et transfert de chaleur dans un mélangeur statique Sulzer SMX avec des fluides rhéologiquement complexes written by CHRISTIAN.. FASOL and published by . This book was released on 1995 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES MELANGEURS STATIQUES SONT, GRACE A LEURS MULTIPLES AVANTAGES, DE PLUS EN PLUS UTULISES DANS L'INDUSTRIE, EN PARTICULIER LORSQUE LES PROCEDES FONT INTERVENIR DES FLUIDES RHEOLOGIQUEMENT COMPLEXES. CETTE UTILISATION EST CEPENDANT ESSENTIELLEMENT BASEE SUR L'EMPIRISME ET LE SAVOIR-FAIRE. NOUS AVONS ETUDIE L'HYDRODYNAMIQUE, VIA LA DISTRIBUTION DES TEMPS DE SEJOUR (DTS) ET LA PERTE DE CHARGE, ET LE TRANSFERT DE CHALEUR, EVENTUELLEMENT COUPLES DANS UN TYPE DE MELANGEUR PARTICULIEREMENT ADAPTE AUX FLUIDES VISQUEUX: LE MELANGEUR STATIQUE SULZER SMX. NOUS PROPOSONS UN MODELE DE DTS BASE SUR L'ASSOCIATION EN PARALLELE POUR CHAQUE ELEMENT DE MELANGEUR STATIQUE D'UN ECOULEMENT PISTON ET D'UN REACTEUR PARFAITEMENT AGITE ; LES DEUX PARAMETRES A AJUSTER DE CE MODELE SONT DES FONCTIONS D'UN NOMBRE DE REYNOLDS GENERALISE QUI TIENT COMPTE DE LA RHEOLOGIE DES FLUIDES QUI CIRCULENT DANS LE MELANGEUR. NOUS PROPOSONS UNE CORRELATION POUR LE FACTEUR DE FROTTEMENT EN FONCTION DE CE MEME NOMBRE DE REYNOLDS GENERALISE ; CETTE CORRELATION EST VALABLE QU'IL Y AIT OU NON COUPLAGE AVEC LE TRANSFERT DE CHALEUR. LE TRANSFERT DE CHALEUR A ETE ETUDIE DE DEUX FACONS. D'UNE PART PAR UNE APPROCHE GLOBALE ET D'AUTRE PART PAR UNE APPROCHE PRENANT EN COMPTE L'HYDRODYNAMIQUE DANS LE MELANGEUR STATIQUE (CONNAISSANCE DE LA DTS). LES CORRELATIONS OBTENUES CONCERNANT LE COEFFICIENT DE TRANSFERT DE CHALEUR SONT TOUT A FAIT COMPARABLES. CE TRAVAIL A ETE COMPLETE PAR DEUX ETUDES PRELIMINAIRES: L'UNE A MONTRE QUALITATIVEMENT L'EFFICACITE DU MELANGEUR A DISPERSER DU GAZ DANS DES MILIEUX RHEOLOGIQUEMENT COMPLEXES ; L'AUTRE A MIS EN EVIDENCE LE CARACTERE CHAOTIQUE DU MELANGE DANS CE TYPE DE MELANGEUR
Book Synopsis Hydrodynamique Et Étude Des Transferts de Matière Gaz-liquide Avec Réaction Dans Des Microcanaux Circulaires by : Tong Zhang
Download or read book Hydrodynamique Et Étude Des Transferts de Matière Gaz-liquide Avec Réaction Dans Des Microcanaux Circulaires written by Tong Zhang and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation mainly deals with the fundamental knowledge of hydrodynamics and reaction characteristics in gas-liquid microreactors. Extensive experimental investigations have been performed in horizontal circular microchannels with diameter from 302 μm to 916 μm. Gas-liquid two-phase flow patterns in the microchannel have been systematic experimental investigated, in which the influence of channel diameters, liquid viscosities and surface tension were considered. Flow pattern regime maps in the present microchannels were developed, and the comparison with existing regime maps and flow pattern transition models in literature implied that transitions in present work could not be well predicted. As a result, a new transition model taking the effects of channel size, liquid physical properties into account was proposed. The gas-liquid two-phase pressure drop characteristics in microchannels were studied. It has been found that the pressure drop was highly flow patterns dependent, and the main trend can be divided into three regions: surface tension-dominated region, transitional region and inertia-dominated region. The pressure drop characteristics in surface tension-dominated and inertia-dominated region were discussed respectively. A modified Lockhart-Martinelli separated flow model in which the effects of channel diameter and liquid properties on the C-value are taken into account was proposed, and it showed a good agreement with respect to our experimental data and others' reported in literature. Hydrodynamics characteristics of Taylor flow have been examined. It was shown that the formation of Taylor flow was dominated by squeezing mechanism, on which the effects of liquid viscosity and surface tension were dramatically. The two-phase pressure drop of Taylor flow could be well predicted with the Kreutzer's model modified by Walsh et al., when capillary number was relatively low. Oxidation of hydrogenated 2-ethyltetrahydroanthraquinone (THEAQH2) in a horizontal circular microchannel have been experimental investigated. Results of visualization study on oxygen-anthraquinone working solution two-phase flow in microchannel showed that the flow pattern transition model and pressure drop model for inertia-dominated region proposed in this dissertation had good predicting accuracy. It was indicated that the gas-liquid interfacial area and space-time yield of hydrogen peroxide in the microchannel are at least one to two orders of magnitude higher than those in the conventional gas-liquid reactors. Keywords: microchannel, two-phase flow pattern, pressure drop, gas-liquid reaction, Taylor flow.
Book Synopsis Études de l'hydrodynamique et du transfert de matière en film ruisselant by : Xavier Dubois
Download or read book Études de l'hydrodynamique et du transfert de matière en film ruisselant written by Xavier Dubois and published by . This book was released on 2004 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans le cadre industriel du traitement d'effluent gazeux, notamment H2S, l'optimisation des unités de type Clauspol passe par le remplacement du garnissage vrac en garnissage structuré. Ce dernier est d'emploi récent, et il est nécessaire d'acquérir une meilleure connaissance de l'hydrodynamique et du transfert de matière sur de telles structures, complexes du fait de leurs géométries. Le transfert de matière gaz-liquide est étudié pour des écoulements en films minces ruisselant sur des surfaces inclinées lisse et corruguée. Les conductances de transfert locales en phases gaz et liquide, kG et kL, ainsi que la surface d'échange effective, a, sont estimées à partir d'expériences d'absorption réactive de CO2 dans des solutions de soude. La dépendance des paramètres caractéristiques du transfert est explorée en fonction des propriétés géométriques des surfaces de ruissellement et des propriétés hydrodynamiques locales caractérisées par le débit et l'épaisseur des films liquides. L'épaisseur déterminée expérimentalement par méthode ultrason ou par analyse de distribution des temps de séjour est faible, inférieure à 1.10-3m en film lisse pour une inclinaison de 30ʻ. Sur plan corrugué, tout en travaillant pour des angles plus fort, 70ʻ, l'épaisseur du film est plus forte, induisant une diminution de la vitesse d'écoulement du liquide. Ainsi, l'augmentation globale du produit kLa observée en passant d'un écoulement sur plan lisse à corrugué, est essentiellement liée aux effets des corrugations sur la surface d'échange. En revanche, la conductance de transfert kL est peu perturbée dans la gamme des nombres de Reynolds étudiée. Elle est aussi peu sensible à la géométrie du film.
Download or read book CJChE written by and published by . This book was released on 2002-08 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multiphase Catalytic Reactors by : Zeynep Ilsen Önsan
Download or read book Multiphase Catalytic Reactors written by Zeynep Ilsen Önsan and published by John Wiley & Sons. This book was released on 2016-06-09 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a holistic approach to multiphase catalytic reactors from their modeling and design to their applications in industrial manufacturing of chemicals Covers theoretical aspects and examples of fixed-bed, fluidized-bed, trickle-bed, slurry, monolith and microchannel reactors Includes chapters covering experimental techniques and practical guidelines for lab-scale testing of multiphase reactors Includes mathematical content focused on design equations and empirical relationships characterizing different multiphase reactor types together with an assortment of computational tools Involves detailed coverage of multiphase reactor applications such as Fischer-Tropsch synthesis, fuel processing for fuel cells, hydrotreating of oil fractions and biofuels processing
Book Synopsis Dictionary of Building and Civil Engineering by : Don Montague
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Book Synopsis Faecal Sludge Management by : Linda Strande
Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Book Synopsis Processing of Solid–Liquid Suspensions by : P. Ayazi Shamlou
Download or read book Processing of Solid–Liquid Suspensions written by P. Ayazi Shamlou and published by Elsevier. This book was released on 2016-08-10 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Processing of Solid-Liquid Suspensions is a collection of articles from several industrialists and academicians who are active in fundamental and applied research relating to handling and processing of particles in liquids. This collection of papers deals with the processes of interaction of particles with each other, with the surrounding liquid and process equipment, whereby knowledge of the mechanism of these interactions can be a sound basis for improving the design of the process equipment and create an optimum environment for the formation and processing of the particulate. The above notion is explained through analysis of the role of turbulent aggregation and breakup of particles in the formation of many solid products from aqueous solutions. This book also analyzes particle size and particulate crystals, whether as final products or as intermediates during processing. In the purification of proteins, two essential units of operation are used; precipitation and solid-liquid separation are analyzed, where theoretical considerations are reviewed. This text also discusses the application of model suspensions in the design of aerobic fermenters in practical industrial uses. High concentration of suspension preparations and solid suspension in liquid flourized beds or in stirred vessels are explained in more detail as to how these affect certain industries. This selection finally presents the progress made in developing design and methods needed by industry. Researchers, chemists, and scientists in industry, as well as advanced students with interests in formation and processing of stable suspensions and in advanced process engineering courses will find this textbook a valuable aid.
Book Synopsis Advances in Uranium Ore Processing and Recovery from Non-conventional Resources by : International Atomic Energy Agency
Download or read book Advances in Uranium Ore Processing and Recovery from Non-conventional Resources written by International Atomic Energy Agency and published by Agency. This book was released on 1985 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microreactors in Organic Chemistry and Catalysis by : Thomas Wirth
Download or read book Microreactors in Organic Chemistry and Catalysis written by Thomas Wirth and published by John Wiley & Sons. This book was released on 2013-02-22 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the second edition of 'Microreactors in Organic Chemistry and Catalysis' all chapters have been revised and updated to reflect the latest developments in this rapidly developing field. This new edition has 60% more content, and it remains a comprehensive publication covering most aspects of the topic. The use of microreactors in homogeneous, heterogeneous as well as biphasic reactions is covered in the main part of the book, together with catalytic, bioorganic and automation approaches. The initial chapters also provide a solid physical chemistry background on fluidics in microdevices. Finally, a chapter on industrial applications and developments covers recent progress in process chemistry. An excellent reference for beginners and experts alike.
Book Synopsis Three-phase Catalytic Reactors by : P. A. Ramachandran
Download or read book Three-phase Catalytic Reactors written by P. A. Ramachandran and published by Gordon & Breach Publishing Group. This book was released on 1983 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
