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Academic literature on the topic 'Chauffage par microondes – Séparation'
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Journal articles on the topic "Chauffage par microondes – Séparation"
BRUN, F., V. DUBOIS, and C. BOUTIN. "L’emploi du broyat de bois, une solution durable pour traiter les eaux ménagères ?" 3, no. 3 (March 22, 2021): 37–53. http://dx.doi.org/10.36904/tsm/202103037.
Full textDissertations / Theses on the topic "Chauffage par microondes – Séparation"
Cerino, Clelio. "Ιntensificatiοn de la séparatiοn d'émulsiοns par chauffage micrο-οndes : applicatiοn à l'extractiοn liquide-liquide de métaux critiques." Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMIR16.
Full textThis thesis focuses on the application of a microwave heating emulsion separation method to the phase separation of emulsion typical to the critical metal recovery processes. Following a literature review centered around emulsion separation, microwave heating in general, and the intensification of the separation of petroleum-based emulsions by microwave heating, the research work focuses firstly on physico-chemical properties relevant to the phase separation of the studied emulsions, and their evolution with temperature. Surface tension measurements, along with preliminary separation tests, show the important but hardly understood role of surface tension and its time evolution. Emulsion and single phase permittivities are then measured and modeled with equations available in the literature, allowing us to prefigure the penetration depth achievable in such materials with microwaves. The measured permittivities justify employing a laboratory scale, microwave intensified phase separator to observe, with small treatment volume and fluids throughput, the effect of microwaves on emulsion separation. Lastly, we study microwave heating numerically, with COMSOL Multiphysics, first with the aforementioned experimental geometry, then with simpler geometries, presenting problems that could arise, should an industrialization occur. Results obtained with the experimental set-up, as well as the simulations performed allow us to confirm the described method’s interest in the metal recovery context, and to prefigure scale-up. The annexes present further research axis identified during the thesis
Klíma, Ladislav. "Chauffage des matériaux par micro-ondes." La Rochelle, 2006. http://www.theses.fr/2006LAROS166.
Full textThe DIC process consists in a high temperature, high pressure and short time treatment followed by an abrupt pressure-drop toward vacuum. This operation implies an auto-vaporization of water, inducing cooling effect and modifying structures. The steam, which has been used until now, does not penetrate easily into the material bulk. The heating by microwaves proves to be a good alternative, which results in a more homogenous temperature field. A DIC reactor with a treatment chamber of 0. 5 l and a magnetron power of 6 kW was developed. Power distribution was measured in Agar gel by using fibre optic temperature probes. Dielectric properties of several fruits and vegetable were measured by an open-ended probe. The resonant multi-mode cavity, which was at last realised, was simulated by means of 3D software Semcad for a frequency of 2450 MHz
Farhat, Asma. "Vapo-diffusion assistée par micro-ondes : conception, optimisation et application." Phd thesis, Université d'Avignon, 2010. http://tel.archives-ouvertes.fr/tel-00547809.
Full textAlkarmo, Ahmad. "Conception de filtres dissipatifs pour applicateurs microondes." Toulouse, INPT, 1997. http://www.theses.fr/1997INPT058H.
Full textPinto-Gateau, Nadia. "Chauffage microondes et résonance dimensionnelle : des concepts aux applications en géométrie cylindrique." Dijon, 1995. http://www.theses.fr/1995DIJOS060.
Full textAtrouz, Mohamed-Tayeb. "Conception des grands applicateurs micro-ondes." Toulouse, INPT, 1994. http://www.theses.fr/1994INPT043H.
Full textLaurent, Régis. "La technologie micro-onde en chimie. Sa spécificité, ses applications et ses innovations : la réaction chimique par confinement." Toulouse 3, 1994. http://www.theses.fr/1994TOU30272.
Full textSafir, Imad. "Nouvelle synthèse de pyrroles par cycloaddition [3+2] intramoléculaire." Poitiers, 2004. http://www.theses.fr/2004POIT2275.
Full textThe 1,3-dipolar cycloaddition reaction is a powerful synthetic tool permitting the synthesis of five membered nitrogen heterocycles. In this work, we have developed a novel synthesis of pyrroles by cycloaddition. We describe the synthesis of numerous new pyrroles with potential pharmacological properties. The reaction of 2-O- and 2-S-propargylbenzaldéhydes with different amines produces an intermediate azomethine ylide which undergoes cycloaddition, followed by aromatization, to provide benzopyrano- and benzothiopyranopyrroles. With alicyclic amines, benzopyrano- and benzothiopyranopyrrolizines (or indolizines) are obtained. In the case of the 2-N-propargylbenzaldehydes, the aromatisation step is more complex, giving rise to new pyrroles by a new mechanism. An extension to other acetylenic dipolarophiles derived from 2-carboxaldehyde-pyrroles and 2-carboxaldehyde-indoles gave new pyrrolopyrrolizines and pyrrolobenzopyrrolizines as well as pyrrolizinopyrrolizines and pyrrolizinobenzopyrrolizines. Finally, we adapted this methodology to be used under microwaves activation. As a result we observed improved yields and shorter reaction times
Apaolaza, Pagoaga Xabier. "Déshydratation assistée thermiquement couplant essorage et micro-ondes." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0276/document.
Full textIn a lot of industrial processes, liquid/solid separation is carried out by combination of mechanical and thermal separation (drying). Thermal drying in a mechanical separation device offers a lot of advantages (lower investment, higher productivity, limited footprint. . . ). Moreover, coupling mechanical and thermal effects may lead in some cases to synergic effects allowing an optimal use of energy.Thermal input by dielectric heating may be adapted to a centrifuge. The objective of the project is to design and produce a prototype at pilot scale in order to point out the energetic interest of such a process. So, mechanical separation (centrifuge filtration, drainage) and dielectric heating have to be used simultaneously. Pilot instrumentation will allow to control key parameters of the coupled operation and the global energy consumption. Main results are : the development and the full instrumentation of a centrifuge pilot allowing implement of microwaves. The demonstration of a synergy, in the case of textile spools, between drying effects generated by dielectric heating and centrifuge effects generated by centrifuge basket rotation. The simulation of different physical phenomena linked to filtration cake drainage, dielectric constants assessment, determination of electromagnetic field, air flow used for vapor extraction and determination of heat and mass transfers
Renaudin, Hervé. "Simulation numérique de la propagation guidée en milieu dissipatif. Maitrise des gradients de champ et couplage électrothermique." Dijon, 1994. http://www.theses.fr/1994DIJOS059.
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