Tesis sobre el tema "Transport Process and Kinetics"
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Visuri, V. V. (Ville-Valtteri). "Mathematical modelling of chemical kinetics and rate phenomena in the AOD Process". Doctoral thesis, Oulun yliopisto, 2017. http://urn.fi/urn:isbn:9789526216713.
Texto completoTiivistelmä Argon-happimellotus (AOD) on yleisin ruostumattoman teräksen valmistamiseen käytettävä yksikköprosessi. AOD-prosessi koostuu useista vaiheista, joissa prosessointinopeutta määrittävät monimutkaiset reaktiomekanismit. Tutkimuksen päätavoitteena oli tutkia kemiallisia nopeusilmiöitä valituissa prosessivaiheissa. Tähän liittyen tehtiin kattava kirjallisuuskatsaus, jonka tavoitteena oli tunnistaa olemassa olevien reaktiomallien pääoletukset. Kirjallisuuskatsauksen pohjalta esitettiin uusi mallien kategorisointi. Lisäksi tehtiin kirjallisuuskatsaus, jonka tavoitteena oli tunnistaa tärkeimmät reaktiokinetiikkaan vaikuttavat ilmiöt AOD-prosessissa. Tässä työssä tutkittiin uudenlaista massavaikutuksen lakiin perustuvaa lähestymistapaa sekä sen soveltamista rinnakkaisten aineensiirron rajoittamien reaktioiden mallinnukseen. Kehitetty lähestymistapa mahdollistaa kemiallisen tasapainotilan sekä sitä rajoittavan aineensiirron samanaikaisen ratkaisun. Aineensiirtonopeuksien ja jäännösaffiniteetin vaikutusta reaktiopinnalla vallitsevaan rajoitettuun tasapainotilaan tutkittiin käyttämällä yksinkertaistettua reaktiomallia. Aiemmin kehitettyä AOD-mallia laajennettiin kahdella ilmiöpohjaisella alimallilla. Lanssipuhallusmalli perustuu oletukseen, että reaktiot tapahtuvat samanaikaisesti kaasusuihkun liikemäärän muodostaman tunkeuman ja kaasusuihkun leikkausvoiman aiheuttamien metallipisaroiden pinnalla. Pelkistysmalli kuvaa AOD-prosessin pelkistysvaiheen aikana tapahtuvia reaktioita olettaen, että kaikki reaktiot tapahtuvat terässulan ja emulgoituneiden kuonapisaroiden välillä. Malleilla saadut tulokset vastasivat hyvin terästehtaalta kerättyä mittausaineistoa. Ilmiöpohjaisen rakenteensa ansiosta kehitetyt mallit soveltuvat hyvin sekä olemassa olevien että uusien tuotantopraktiikoiden analysoimiseen
Lim, Chin Wai. "Numerical Modelling of Transient and Droplet Transport for Pulsed Pressure - Chemical Vapour Deposition (PP-CVD) Process". Thesis, University of Canterbury. Mechanical Engineering, 2012. http://hdl.handle.net/10092/6829.
Texto completoXu, Shulan. "Effect of Uncertainty of Rock Properties on Radionuclide Transport by Groundwater : Implications for Performance Assessments of the Repository of Spent Nuclear Fuel in Heterogeneous Bedrock". Doctoral thesis, Uppsala University, Department of Earth Sciences, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-544.
Texto completoThe overall objective of the current study is to develop a quantitative understanding of the effects of spatial variability in physical and geochemical properties of crystalline rock on the migration of radionuclides along a single fracture in bedrock. A stochastic model was developed to describe the transport of solutes in fractured rock. The model describes the migration of radionuclides along a one-dimensional path and includes the transversal diffusion into the rock matrix and sorption kinetics. By using a Lagrangian method of description we can extend the model to the description of a two-dimensional transport problem in single fractures.
This study presents the first analysis of the impact of heterogeneous mass transfer on the transport of radionuclides in rock fractures, where most of the relevant rock properties such as aperture, porosity, effective diffusivity, sorption capacity and maximum diffusion depth are defined as being spatially random. The stochastic analysis performed here reflects the uncertainty in our knowledge of the properties associated with a discrete sampling technique in site investigations.
Geostatistics of the main parameters was determined experimentally on a large number of rock samples taken from the Swedish crystalline basement. The knowledge of the covariance functions of the main rock properties is then used as a basis for a stochastic analysis. By combining the small perturbation approach with the spectral method the problem could be solved in terms of closed form solutions for the central temporal moments of the residence time probability density function.
In order to be able to distinguish between the effects of various mechanisms from the effects of heterogeneity on the migration of radionuclides, it was necessary to perform independent studies of the effect of the variation of the dispersion coefficient on the aspect ratio of a rectangular flow section and the effect of adsorption kinetics on the migration.
Finally, the effect of the heterogeneous rock properties on the solute transport observed in a limited number of migration experiments corresponds fairly well to the theoretical effect expected on the basis of the experimentally determined auto-covariance functions.
Miomandre, Fabien. "Étude de processus électrochimiques non réversibles par une méthode à base d'opérateurs". Université Joseph Fourier (Grenoble ; 1971-2015), 1995. http://www.theses.fr/1995GRE10163.
Texto completoInce, Ceren. "Water transport kinetics in mortar-masonry systems". Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.509745.
Texto completoVenugopal, Vinithra. "Kinetics of Ion Transport in Conducting Polymers". The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1458229667.
Texto completoLeyva-Ramos, Roberto, Nahum A. Medellín-Castillo, Jovita Mendoza-Barron, Laura Fuentes-Rubio, Rosa M. Guerrero-Coronado y Raul Ocampo-Perez. "Kinetics of fluoride adsorption onto bone char". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-191067.
Texto completoMusabyimana, Martin. "Deammonification Process Kinetics and Inhibition Evaluation". Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/29364.
Texto completoPh. D.
Katoch, Sunain, Vinay Sharma y Patit Paban Kundu. "Swelling kinetics of unsaturated polyester–layered silicate nanocomposite". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-186443.
Texto completoLeyva-Ramos, Roberto, Raul Ocampo-Perez, Oliva L. Torres-Rivera, Maria S. Berber-Mendoza y Nahum A. Medellin-Castillo. "Kinetics of pyridine adsorption onto granular activated carbon". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-191056.
Texto completoSong, Young Chul. "Kinetics of water transport in ultraviscous organic aerosol". Thesis, University of Bristol, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.752782.
Texto completoJaburek, Martin. "Kinetics and regulation of mitochondrial cation transport systems /". Full text open access at:, 1999. http://content.ohsu.edu/u?/etd,207.
Texto completoHaas, Ole-Erich, Jean-Marc Simon y Signe Kjelstrup. "Adsorption-desorption kinetics of H 2 molecules on graphite". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-189614.
Texto completoRadchenko, Taras, Valentyn Tatarenko y Hélèna Zapolsky. "Diffusional atomic-ordering kinetics of close-packed solid solutions". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193505.
Texto completoDavies, Matthew Lloyd. "Exploiting nonlinear kinetics to enhance process operability". Thesis, University of Leeds, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270897.
Texto completoLegalatladi, Seetsela. "The kinetics of endosome processing". Master's thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/27047.
Texto completoLeyva-Ramos, Roberto, Nahum A. Medellín-Castillo, Jovita Mendoza-Barron, Laura Fuentes-Rubio, Rosa M. Guerrero-Coronado y Raul Ocampo-Perez. "Kinetics of fluoride adsorption onto bone char". Diffusion fundamentals 11 (2009) 84, S. 1-2, 2009. https://ul.qucosa.de/id/qucosa%3A14056.
Texto completoAmikiya, Emmanuel Adoliwine. "Numerical simulation of chemical kinetics transport and flow processes". Thesis, University of Pretoria, 2020. http://hdl.handle.net/2263/77830.
Texto completoThesis (PhD)--University of Pretoria, 2020.
Mathematics and Applied Mathematics
PhD
Unrestricted
Leyva-Ramos, Roberto, Raul Ocampo-Perez, Oliva L. Torres-Rivera, Maria S. Berber-Mendoza y Nahum A. Medellin-Castillo. "Kinetics of pyridine adsorption onto granular activated carbon". Diffusion fundamentals 11 (2009) 83, S. 1-2, 2009. https://ul.qucosa.de/id/qucosa%3A14054.
Texto completoLarisch, Wolfgang. "4 Coupled compartments – an analytical solution for diffusion and reaction kinetics". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-198373.
Texto completoAdhoum, Nafaâ. "Insertion du sodium et pénétration de l’électrolyte dans le carbone en milieu NaF fondu à 1025°C". Grenoble INPG, 1996. http://www.theses.fr/1996INPG0185.
Texto completoOne of the most important factors causing the failure of carbon cathode, during aluminum electrolysis by Hall-Héroult process, is the uptake of sodium which leads to a macroscopic swelling of cathode. To understand the fundamental mechanism of sodium-carbon interaction, we carried our electrochemical kinetic study in a pure molten NaF electrolyte at 1025°C. We proved the occurrence of a complex interaction between sodium and carbon. Indeed, sodium is showed to be distributed between two kinds of sites in the host material : normal sites in the Van der Wals gap between the carbon’s plans and traps which are located at microporosity and dislocations. We also showed the occurrence of a slow and irreversible transfer of sodium from traps to normal intercalation sites. Moreover, sodium transport in carbon matrix is found to be limited by a first order phase transition. Taking into account all these experimental observations, we suggested a complete mechanism scheme and developed a mathematical model which allowed the recovery, with a good accuracy of the experimental results
Walmsley, A. R. "The kinetics of glucose transport in human red blood cells". Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377727.
Texto completoHsu, Jaanpyng. "Swelling, mass transport, and chemical kinetics in bituminous coal pyrolysis". Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/39029.
Texto completoShi, Jianmin y Klaus-Dieter Becker. "Kinetics of cation site-exchange in complex oxides by optical relaxation spectroscopy". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-186700.
Texto completoKaganovskii, Yuri, Andrey A. Lipovskii, Emma Mogilko, Valentina Zhurikhina y Michael Rosenbluh. "Kinetics of bulk nano-clustering in silver-doped glasses during reactive hydrogen diffusion". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193695.
Texto completoCochain, Benjamin, V. Magnien, Daniel R. Neuville y Pascal Richet. "Diffusion in silicate melts: kinetics and mechanisms of redox reactions". Diffusion fundamentals 6 (2007) 77, S. 1, 2007. https://ul.qucosa.de/id/qucosa%3A14257.
Texto completoFrömberg, Daniela. "Reaction Kinetics under Anomalous Diffusion". Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2011. http://dx.doi.org/10.18452/16374.
Texto completoThe present work studies the generalization of reaction-diffusion schemes to subdiffusion. The subdiffusive dynamics was modelled by means of continuous-time random walks on a mesoscopic scale with a heavy-tailed waiting time pdf lacking the first moment. The reaction was assumed to take place on a microscopic scale, i.e. during the waiting times, obeying the mass action law. The resultant equations are of integro-differential form, and the reaction explicitly affects the transport term. The long ranged memory of the subdiffusion kernel is modified by a factor accounting for the reaction of particles during the waiting times. The degradation A->0 was considered and a general expression for the solution to arbitrary Dirichlet Boundary Value Problems was derived. For stationary solutions to exist in reaction-subdiffusion, the assumption of reactions according to classical rate kinetics is essential. As an example for a nonlinear reaction-subdiffusion system, the irreversible autocatalytic reaction A+B->2A under subdiffusion is considered. A subdiffusive analogue of the classical Fisher-Kolmogorov-Petrovskii-Piscounov (FKPP) equation was derived and the resultant propagating fronts were studied. Two different regimes were detected in numerical simulations, and were discussed using both crossover arguments and analytic calculations. The first regime is characterized by a decaying front velocity and width. The fluctuation dominated regime is not within the scope of the continuous description. The velocity of the front decays faster in time than in the continuous regime, and the front is atomically sharp. Another setup where reactants A penetrate a medium initially filled with immobile reactants B and react according to the scheme A+B->(inert) was also considered. This problem was approximately described in terms of a moving boundary problem (Stefan-problem). The theoretical predictions concerning the moving boundary were corroborated by numerical simulations.
Li, Huayu. "Process measurements and kinetics of unseeded batch cooling crystallization". Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53503.
Texto completoKaganovskii, Yuri, Andrey A. Lipovskii, Emma Mogilko, Valentina Zhurikhina y Michael Rosenbluh. "Kinetics of bulk nano-clustering in silver-doped glasses during reactive hydrogen diffusion: Kinetics of bulk nano-clustering in silver-doped glasses duringreactive hydrogen diffusion". Diffusion fundamentals 6 (2007) 42, S. 1-2, 2007. https://ul.qucosa.de/id/qucosa%3A13168.
Texto completoDavie, R. J. "The uptake and transport of zinc in isolated intestinal mucosa". Thesis, Open University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234707.
Texto completoKatoch, Sunain, Vinay Sharma y Patit Paban Kundu. "Swelling kinetics of unsaturated polyester and their montmorillonite filled nanocomposite synthesized from glycolyzed PET". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-186158.
Texto completoRuthven, Douglas M. "Adsorption and desorption kinetics for diffusion controlled systems with a strongly concentration dependent diffusivity". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193874.
Texto completoKuzovkov, Vladimir N., Eugene A. Kotomin, Anatoli I. Popov y Rafael Vila. "Diffusion-controlled kinetics of metallic colloid formation in irradiated Al2O3, MgO and NaCl crystals". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-198353.
Texto completoProkofjev, Sergei I., Erik Johnson y Ulrich Dahmen. "Kinetics of dissolution of liquid Pb nano-inclusions attached to a dislocation in aluminum". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-198539.
Texto completoChen, Jiaping. "Sorption of metal ions from aqueous solutions : equilibrium, kinetics, and transport". Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/21467.
Texto completoMa, Wen Ph D. Massachusetts Institute of Technology. "Initial oxidation of zirconium : chemistry, atomic structure, transport and growth kinetics". Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/117452.
Texto completoCataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 175-184).
The objective of this thesis is to uncover the chemical states and atomic structure of the initial oxide on zirconium and the oxygen transport kinetics through this oxide under electric field. This goal is important for enabling more accurate zirconium oxidation models, for example for nuclear reactor materials, as well as for assessing the mechanisms that govern the performance of zirconia based technologies, such as redox based resistive switching memory devices, gate dielectric for metal oxide semiconductor devices, and electrolytes for solid oxide fuel cells ...
by Wen Ma.
Ph. D.
Larisch, Wolfgang. "4 Coupled compartments – an analytical solution for diffusion and reaction kinetics". Diffusion fundamentals 24 (2015) 32, S. 1, 2015. https://ul.qucosa.de/id/qucosa%3A13497.
Texto completoRuthven, Douglas M. "Adsorption and desorption kinetics for diffusion controlled systems with a strongly concentration dependent diffusivity: Adsorption and desorption kinetics for diffusion controlledsystems with a strongly concentration dependent diffusivity". Diffusion fundamentals 6 (2007) 51, S. 1-11, 2007. https://ul.qucosa.de/id/qucosa%3A14230.
Texto completoWeber, Sven-Ulf, Oliver Bartels y Klaus-Dieter Becker. "A variable-temperature Mössbauer study into the structure, disorder and formation kinetics of iron nitrides". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-188057.
Texto completoChowdhury, Debashish. "First passage times: a common theme in the kinetics of macromolecular motors". Diffusion fundamentals 20 (2013) 12, S. 1, 2013. https://ul.qucosa.de/id/qucosa%3A13534.
Texto completoShi, Jianmin y Klaus-Dieter Becker. "Kinetics of cation site-exchange in complex oxides by optical relaxation spectroscopy". Diffusion fundamentals 12 (2010) 31, 2010. https://ul.qucosa.de/id/qucosa%3A13877.
Texto completoSimon, Jean-Marc y Jean-Pierre Bellat. "Adsorption kinetics of mixtures of n-hexane and 2-methylpentane on silicalite by nonequilibrium molecular dynamics". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193628.
Texto completoSterling, Michael Conroy Jr. "Aggregation and transport kinetics of crude oil and sediment in estuarine waters". Texas A&M University, 2003. http://hdl.handle.net/1969.1/572.
Texto completoAtay, N. Z. "Transport and interfacial exchange kinetics in one- and two-phase disperse systems". Thesis, University of Kent, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374831.
Texto completoHaubrock, Jens. "The process of dimethyl carbonate to diphenyl carbonate: thermodynamics, reaction kinetics and conceptual process design". Enschede : University of Twente [Host], 2007. http://doc.utwente.nl/58404.
Texto completoKatoch, Sunain, Vinay Sharma y Patit Paban Kundu. "Swelling kinetics of unsaturated polyester–layered silicate nanocomposite: depending on the fabrication method". Diffusion fundamentals 13 (2010) 1, S. 1-31, 2010. https://ul.qucosa.de/id/qucosa%3A13860.
Texto completoHaas, Ole-Erich, Jean-Marc Simon y Signe Kjelstrup. "Adsorption-desorption kinetics of H 2 molecules on graphite: a molecular dynamics study". Diffusion fundamentals 11 (2009) 29, S. 1-2, 2009. https://ul.qucosa.de/id/qucosa%3A13978.
Texto completoSimon, Jean-Marc, Edith Fardet-Lemaire, Igor Bezverkhyy, Jean-Pierre Bellat y Florence Baras. "Kinetics of adsorption of linear and branched C6 alkanes onto ZSM-5 zeolite - experiments and molecular simulations". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-195653.
Texto completoSingare, Pravin U. "Ion-Isotopic exchange reaction kinetics in characterization of anion exchange resins Dowex 550A LC and Indion-820". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-184151.
Texto completoHarris, Rosemary J., Jevgenijs Kaupužs y Reinhard Mahnke. "Metastability in the zero-range process". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-195303.
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