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Статті в журналах з теми "Réacteurs chimiques – Simulation, Méthodes de":
Amy, G., J. F. Debroux, R. Arnold, and L. G. Wilson. "Emploi de la pré-ozonation pour augmenter la biodégradabilité d'un effluent secondaire dans un système de traitement par inflitration dans le sol." Revue des sciences de l'eau 9, no. 3 (April 12, 2005): 365–80. http://dx.doi.org/10.7202/705258ar.
Kherris, Sahraoui, Mohammed Makhlouf, Omar Sebbane, and Rachid Chadouli. "Simulation et optimisation énergétique de la combustion isobare des hydrocarbures saturés CnH2n+2, par deux approches de résolution." Journal of Renewable Energies 13, no. 1 (October 25, 2023): 101–8. http://dx.doi.org/10.54966/jreen.v13i1.181.
Дисертації з теми "Réacteurs chimiques – Simulation, Méthodes de":
Louleh, Ziad. "Modélisation et conduite des réacteurs discontinus par analyse des flux thermiques." Toulouse, INPT, 1996. http://www.theses.fr/1996INPT037G.
Foucher, Laurent. "Utilisation de la méthode des éléments finis pour la simulation des réacteurs à termes sources distribués : application aux réacteurs électrochimiques et au chauffage par induction électromagnétique." Toulouse, INPT, 1994. http://www.theses.fr/1994INPT029G.
Roger, Thierry. "Modélisation du comportement de réacteurs chimiques semi-fermés à double enveloppe et à fluide unique." Rouen, 1993. http://www.theses.fr/1993ROUES036.
Touré, Inza. "Contribution à la simulation numérique par éléments finis de l'hydrodynamique des cuves agitées : application à l'étude des bioréacteurs." Châtenay-Malabry, Ecole centrale de Paris, 1993. http://www.theses.fr/1993ECAP0296.
Simon, Muriel. "Etude des performances d'un système de mélange-agitation fluidique : cas des jets multiples et instationnaires." Toulouse, INSA, 1992. http://www.theses.fr/1992ISAT0033.
Sklaveniti, Sofia. "Développement et déploiement sur le terrain d’un analyseur pour la mesure de la vitesse de formation d’ozone dans la troposphère." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10121/document.
Ground level ozone (O3) is a major environmental concern due to its detrimental impacts on human health, vegetation and climate. The photochemical formation of ozone follows a complex nonlinear chemistry that makes strategies for ozone reduction difficult to implement. Governments rely on atmospheric chemistry models to develop emission regulations, but there are still uncertainties associated with the chemical mechanisms used in these models. Direct measurements of ozone production rates, P(O3), is a new technique that can help validating current atmospheric chemical mechanisms and provide real-time data for emission regulations of ozone precursors. The main objective of this thesis was (i) to advance the understanding of P(O3) measurements and (ii) to investigate the ozone production chemistry in ambient air. In this context, an instrument capable of P(O3) measurements was developed, characterized in the laboratory and deployed in the field. The principle of the instrument is based on differential Ox (=O3+NO2) measurements between two sampling reactors, one acting as a “reference” reactor with no O3 production, and the other one reproducing the same O3 production chemistry than in ambient air. The characterization of this instrument was performed through laboratory and modelling experiments to assess the accuracy of P(O3) measurements. Finally, the instrument was deployed during the IRRONIC campaign to investigate the P(O3) sensitivity to NO in a forested area. Comparison between measured and modeled P(O3) values allowed to assess the performances and limitations of this new instrument and evaluate the feasibility of direct P(O3) measurements
Garzón, Losik Germán Alexander. "Étude et modélisation d’un procédé de dissolution poussée en réacteur continu – application aux oxydes (U, Pu)O₂." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0050.
Plutonium multirecycling aims to stabilise the plutonium inventory and eventually close the fuel cycle in France. This action involves the reprocessing and recycling of plutonium-rich Mixed OXide (MOX) spent fuel, which implies the adaptation of current technologies, in particular dissolution. Therefore, an experimental study of the reaction between uranium-plutonium mixed oxides and nitric acid coupled with chemical reactor modelling is required. In this context, a study of the dissolution of three mixed oxides (30, 40, and 65% Pu/(U+Pu)) and plutonium dioxide in nitric acid is carried out using an optical setup. It can be highlighted that the mixed oxide dissolves according to a similar mechanism as plutonium dioxide when the plutonium content in the solid exceeds 30%. Moreover, only the mixed oxide with the highest uranium content undergoes an autocatalytic reaction mechanism similar to that identified for uranium dioxide. A dissolution model describing the size evolution of a single particle against time was developed. Such model considers the description of particles surface by a fractal geometry approach as well as the surface where the reaction actually takes place. Model was validated by comparison of experimental data from this work and from literature. In addition, a second model was developed, taking into account the single particlemodel, based on population balance equations. The model allows to describe the behaviour of a fluidised bed dissolver, which presents interesting advantages for solid-fluid type reactions. Finally, by implementing the developed model, simulations were performed showing a first estimation of the feasibility of a new dissolution process for current and upcoming MOX fuels
Matamoros, Marin Fatima. "Modélisation et optimisation des fours de cémentation gazeuse basse pression." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0288.
This PhD work deals with the development of an optimization methodology for low-pressure gas carburizing furnaces. The objective is to determine the optimal operating conditions allowing operators exposed to the toxic by-products generated (polycyclic aromatic hydrocarbons (PAHs) and soot in this case) to work in safer conditions. A first-principles model of the process based on mass balance equations as well as equations derived from a detailed kinetic mechanism of gas-phase acetylene pyrolysis is first developed. The kinetic model is then reduced in order to reduce the size of the differential system; then completed by a model of soot formation, a pyrolytic carbon formation reaction and heterogeneous phenomena occurring on the surface of the steel parts to be cemented which are described by means of Langmuir-Hinshelwood-Hougen-Watson model. Experiments conducted on a laboratory scale tubular reactor and a jet stirred reactor are carried out without steel parts. The results are then compared to the results of simulations of acetylene pyrolysis, soot and pyrolytic carbon formation in a plug flow reactor and in a perfectly stirred tank reactor. The results show the importance of the role played by the formation of pyrolytic carbon and soot on the formation of PAH. Experiments on an industrial low-pressure gas-carburizing furnace are conducted as well; they consist in the carburization of steel parts using an industrial "recipe", i.e. predetermined operating conditions obtained by trial-and-error basis in order to meet the desired carburizing depth. The experimental results are used to estimate the parameters of the heterogeneous surface reaction by assuming a complete model of low-pressure gas carburizing in a perfectly stirred tank reactor. The model is then used in the formulation of the dynamic constrained optimization problem which aims to minimize the production of toxic compounds while ensuring the industrial quality of the carburized steel parts. Optimal operating conditions allowing to obtain steel parts of the same quality as those obtained with the industrial recipe are then determined by solving the optimization problem and experiments using the new operating conditions are conducted in the industrial furnace. The results corroborate that the optimized recipe leads to steel parts of the same quality as the industrial recipe, while reducing the process toxicity
Elia, Marc. "Etude de la stabilité thermique dans les réacteurs chimiques." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4707/document.
In refining and petrochemistry process safety is a major issue. For highly exothermic processes it is necessary to ensure in a rigorous way the safe that the process operates in safe conditions, hence avoiding thermal runaway. The objective of this thesis was to develop a methodology to determine the operating conditions of reliable operation of chemical reactors. The methodology relies on stationary and dynamic analysis. The stationary stability analysis based on the Van Heerden criterion was generalized to complex chemical systems. The dynamic analysis applies the perturbation theory to definitely determine if a stationary point is stable according to eigenvalue analysis.The methodology was applied to ebullated-bed technology for residue hydroconversion at pilot and industrial scale. Two comprehensive dynamic models that accurately represent the ebullated-bed pilot plant and industrial process were developed for the study. The models take into account a detailed description of the reactive system and the configuration of the pilot and industrial plants: three phases, kinetics and flow characterization. A stationary and dynamic thermal stability analysis was carried out for both configurations and stable/unstable operating regions were identified. The study showed that the pilot plant reactor can operate in a larger domain of operating conditions compared to the industrial reactor while the parameters have the same effect on both reactors. The resulting reactor operation diagrams are a essential guide for engineers in the reactor design and operation practice
Crouslé, Olivier. "Analyse, mise au point et méthodes d'exploitation d'un réacteur chimique pilote pour calorimétrie de réaction." Lyon 1, 1996. http://www.theses.fr/1996LYO10191.
Книги з теми "Réacteurs chimiques – Simulation, Méthodes de":
Gilani, Hossein G. Advanced process control & simulation for chemical engineers. Toronto: Apple Academic Press, 2013.
Gilani, Hossein G., Katia G. Samper, and Reza K. Haghi. Advanced Process Control and Simulation for Chemical Engineers. Taylor & Francis Group, 2021.
Nakamoto, Takamichi. Essentials of Machine Olfaction and Taste. Wiley & Sons, Limited, John, 2016.
Essentials of Machine Olfaction and Taste. Wiley, 2016.