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Artykuły w czasopismach na temat "Performances catalytiques"
Le Bras, M., M. Agounaou, H. Baussart, L. Gengembre i JM Leroy. "Performances catalytiques des oxydes mixtes BixGd1-xVO4, catalyseurs d’hydrogénation du dioxyde de carbone". Journal de Chimie Physique 91 (1994): 7–36. http://dx.doi.org/10.1051/jcp/1994910007.
Pełny tekst źródłaNibou, Djamel, i Samira Amokrane. "Performances catalytiques de faujasites Y échangées par des cations de Ce3+, La3+, UO22+, Co2+, Sr2+, Pb2+, Tl+ et NH4+ dans la réaction de dismutation du toluène". Comptes Rendus Chimie 13, nr 5 (maj 2010): 527–37. http://dx.doi.org/10.1016/j.crci.2009.12.006.
Pełny tekst źródłaAzri, Yamina Mounia, i Djilali Zerouali. "Traitement d’effluents pétrochimiques par procédés Electro-Fenton Etude électrochimique sur la réaction de réduction d’oxygène pour la génération du peroxyde d’hydrogène". Journal of Renewable Energies 16, nr 1 (22.10.2023). http://dx.doi.org/10.54966/jreen.v16i1.359.
Pełny tekst źródłaRozprawy doktorskie na temat "Performances catalytiques"
Cojocariu, Ana Mihaela. "Matériaux mésostructurés pour des applications dans les oxydations catalytiques : optimisation de la synthèse et des performances catalytiques". Electronic Thesis or Diss., Montpellier 2, 2010. http://www.theses.fr/2010MON20030.
Pełny tekst źródłaThe objective of this thesis was the optimization of the synthesis and catalytic performances of Ti-containing materials in the oxidation with H2O2 of a wide range of model organic compounds. The original part is represented by the synthesis of SiO2-TiO2 mixed oxides by a non hydrolytic sol-gel procedure and their use in different catalytic reactions like: sulfoxidation, epoxidation of olefins, oxidation of aromatic hydrocarbons and phenols. These materials were compared with ordered mesoporous materials (Ti-MCM-41 and Ti-MCM-48) and microporous titanosilicalite TS-1. The non-hydrolytic sol-gel process based on the etherolysis and condensation of chloride precursors offers a simple one-step route to mesoporous SiO2-TiO2 xerogels with a good dispersion of Ti species and outstanding textural properties, without resorting to supercritical drying procedures as in the case of the mixed oxides obtained by a hydrolytic way. Moreover, these materials exhibited a remarkable catalytic activity in the oxidation with H2O2 of all the organic compounds investigated (significant conversions, good selectivities and H2O2 efficiencies). The catalysts were stable under operating conditions
Cojocariu, Ana Mihaela. "Matériaux mésostructurés pour des applications dans les oxydations catalytiques : optimisation de la synthèse et des performances catalytiques". Thesis, Montpellier 2, 2010. http://www.theses.fr/2010MON20030.
Pełny tekst źródłaThe objective of this thesis was the optimization of the synthesis and catalytic performances of Ti-containing materials in the oxidation with H2O2 of a wide range of model organic compounds. The original part is represented by the synthesis of SiO2-TiO2 mixed oxides by a non hydrolytic sol-gel procedure and their use in different catalytic reactions like: sulfoxidation, epoxidation of olefins, oxidation of aromatic hydrocarbons and phenols. These materials were compared with ordered mesoporous materials (Ti-MCM-41 and Ti-MCM-48) and microporous titanosilicalite TS-1. The non-hydrolytic sol-gel process based on the etherolysis and condensation of chloride precursors offers a simple one-step route to mesoporous SiO2-TiO2 xerogels with a good dispersion of Ti species and outstanding textural properties, without resorting to supercritical drying procedures as in the case of the mixed oxides obtained by a hydrolytic way. Moreover, these materials exhibited a remarkable catalytic activity in the oxidation with H2O2 of all the organic compounds investigated (significant conversions, good selectivities and H2O2 efficiencies). The catalysts were stable under operating conditions
Astafan, Amir. "Synthèses, caractérisations et performances catalytiques des zéolithes nanoéponge de type structurale *BEA". Thesis, Poitiers, 2016. http://www.theses.fr/2016POIT2269/document.
Pełny tekst źródłaThe method to ameliorate the diffusion of reactants, reaction intermediates, and products inside the zeolite is by shortening the diffusion path length, i.e., crystals size. The growth of the crystals is a function of gel composition synthesis, crystallization time, temperature, etc. The mastering of this growth allows to obtain a wide range of the size which ranges from several micrometers to a few tens of nanometers. It is possible now to limit the diffusion path to only three unit cells by inhibiting the crystals' growth in one direction during the hydrothermal synthesis. For that, the use of a peculiar organic surfactant geminate is indispensable, it gives a hierarchical material with zeolitic crystals of 4 nm thickness separated by structured and regular mesopores in the case of *BEA type zeolite. The morphology of this material resembles a sea sponge.Two reaction models, n-hexadecane hydroisomerization and ethanol transformation to hydrocarbons, demonstrate that the reactants and the products diffusion was optimized in the beta nanosponges. Surprisingly the catalyst stability and selectivity were improved instead of activity. In fact this is due to the extreme reducing of the zeolite crystals’ thickness that leads to increase the aluminum number in the pore mouth, which although very accessible, but incapable to catalyze the isomerization and cracking reactions. The aluminums near the external surface, in contrary to those in the crystal heart, do not benefit from the long distance effects, which makes them weaker
Julian, Aurélie. "Elaboration par coulage en bande et cofrittage de réacteurs catalytiques membranaires multicouches-performances". Phd thesis, Université de Limoges, 2008. http://tel.archives-ouvertes.fr/tel-00347929.
Pełny tekst źródłaL'architecture des réacteurs intègre un catalyseur, une membrane conductrice mixte de type La1-xSrxFe1-yGayO3-d et un support poreux actif. Le choix du matériau du support s'est porté sur La0,8Sr0,2FeO3-d, en vue du co-frittage des couches denses et poreuses, ce qui permet d'assurer une continuité chimique et de diminuer les coûts. Des membranes supportées planes LSFG8273/LSF821 et LSFN8273/LSFG8273/LSF821 ont été élaborées par coulage en bande, thermocompression et co-frittage. Les performances du réacteur ont pu être largement améliorées par la présence du support poreux et de la couche catalytique. Enfin, les matériaux ont fait l'objet d'une étude thermomécanique.
Pinabiau, Maryse. "Préparation, caractérisation et performances catalytiques de réservoirs d'hydrogène "intermétalliques terres rares - nickel oxydes"". Lille 1, 1987. http://www.theses.fr/1987LIL10116.
Pełny tekst źródłaPinabiau, Maryse. "Préparation, caractérisation et performances catalytiques de réservoirs d'hydrogène "intermétalliques terres rares-nickel oxydes"". Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37608932d.
Pełny tekst źródłaBoisdron, Nathalie. "Oxydation sélective du propane : performances catalytiques de systèmes oxydes et étude mécanistique de l'oxydéshydrogénation en propène". Lille 1, 1991. http://www.theses.fr/1991LIL10096.
Pełny tekst źródłaPoulet, Olivier. "Influence de différents ajouts (alcalins, phosphore, fluor) sur les performances catalytiques d'un catalyseur d'hydrotraitement de type MoS2-Al2O3". Lille 1, 1991. http://www.theses.fr/1991LIL10057.
Pełny tekst źródłaNahama, Florence. "Influence des proprietes acido-basiques de l'oxyde de rhenium supporte sur les performances catalytiques en metathese des olefines". Paris 6, 1996. http://www.theses.fr/1996PA066644.
Pełny tekst źródłaMarchal, Catherine. "Deshydrogenation oxydante de l'acide isobutyrique : contribution a l'etude des facteurs determinant la stabilite des performances catalytiques des heteropolyanions". Paris 6, 1991. http://www.theses.fr/1991PA066568.
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