Academic literature on the topic 'Zéolithes'
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Journal articles on the topic "Zéolithes"
Derouane, Éric G. "Les zéolithes, réacteurs catalytiques microscopiques." Bulletin de la Classe des sciences 6, no. 1 (1995): 165–72. http://dx.doi.org/10.3406/barb.1995.27626.
Full textSoualah, Ahcène, Madjid Berkani, and Mohamed Chater. "Synthèse et caractérisation des zéolithes de type ZSM-5." Comptes Rendus Chimie 7, no. 6-7 (June 2004): 713–20. http://dx.doi.org/10.1016/j.crci.2004.04.005.
Full textRouchaud, J., L. Sondengam, and J. J. Fripiat. "Activité Catalytique En Oxydation Des Zéolithes D'Éléments De transition." Bulletin des Sociétés Chimiques Belges 77, no. 9-10 (September 2, 2010): 505–11. http://dx.doi.org/10.1002/bscb.19680770905.
Full textBalmer, W., C. Bore, and R. C. Régis. "Usages des zéolithes pour une meilleure qualité des eaux de consommation." Cahiers de l'Association Scientifique Européenne pour l'Eau et la Santé 9, no. 1 (2004): 29–48. http://dx.doi.org/10.1051/asees/20040901029.
Full textLionel Roué, Emmanuel Briot, and Fethi Bedioui. "Synthèse critique de la caractérisation électrochimique de zéolithes et d'aluminophosphates chimiquement modifiés." Canadian Journal of Chemistry 76, no. 12 (December 1, 1998): 1886–909. http://dx.doi.org/10.1139/v98-198.
Full textDelahay, Gérard, Stéphane Kieger, Bernard Neveu, and Bernard Coq. "Origine de N2O en réduction de NO par NH3 sur Cu-zéolithes." Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry 1, no. 4 (April 1998): 229–35. http://dx.doi.org/10.1016/s1387-1609(98)80039-x.
Full textMourran, A., P. Magnoux, and M. Guisnet. "Alkylation du toluène par l’heptène-1 sur zéolithes HY et sur montmorillonite." Journal de Chimie Physique 92 (1995): 1394–404. http://dx.doi.org/10.1051/jcp/1995921394.
Full textde Carvalho, AP, QL Wang, G. Giannetto, D. Cardoso, M. Brotas de Carvalho, F. Ramoa Ribeiro, JB Nagy, J. El Hage-Ai Asswad, EG Derouane, and M. Guisnet. "Influence des conditions de traitement hydrothermique sur les caractéristiques physicochimiques des zéolithes Y." Journal de Chimie Physique 87 (1990): 271–88. http://dx.doi.org/10.1051/jcp/1990870271.
Full textLa Iglesia, A., and AJ Aznar. "Estimation des énergies libres de Gibbs de formation de zéolithes, feldspaths et feldspathoïdes." Journal de Chimie Physique 87 (1990): 1681–89. http://dx.doi.org/10.1051/jcp/1990871681.
Full textRouchaud, J., P. Mulkay, and J. Fripiat. "Oxydation Du Para-Xylène Liquide Catalysée Par Les Zéolithes Chargés D'Éléments De Transition." Bulletin des Sociétés Chimiques Belges 77, no. 11-12 (September 2, 2010): 537–42. http://dx.doi.org/10.1002/bscb.19680771101.
Full textDissertations / Theses on the topic "Zéolithes"
Demaret, Coralie. "Mise en forme de zéolithes : contrôle des propriétés acides des zéolithes et description de l’interface zéolithe / liant." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1042.
Full textZeolites are crystalline and microporous aluminosilicates with an ordered and regular structure of molecular dimension. ZSM-5 zeolites are widely used in the industry as acid catalysts but their commercial application requires millimeter-sized bodies for mechanical strength and dilution of the zeolite acidity mainly, by addition of binder, peptizer... Shaping of zeolite is the key step of the process for the industrialization of a catalyst because the additives may modify the intrinsic properties of zeolites after shaping. The aims of this PhD thesis are to identify and rationalize the physico-chemical impacts of shaping on the zeolite properties by studying the accessibility, the concentration and the strength of acid sites, as well as to describe the zeolite/binder interface. To do this, a multi-technical approach was set up. It combines model shaped materials, by varying the type of binder and ZSM-5 zeolite, textural, spectroscopic (IR, NMR) and acid characterizations, microscopy and catalytic testing. The characterization of zeolites used in this study (various crystal sizes and Si/Al ratios) was carried out prior of those of shaped materials. Large crystals have been shown more acid but less active in catalysis. Some of Al of the small crystals form aluminols whose acidity is weaker than that of bridging sites. Moreover, all the bridging sites do not contribute to the catalytic reaction, only a part of the crystal is efficient. During this work, two types of binders were used: alumina and silica which are widely used in the industry. The strategy was to highlight, in a first step, the shaping impacts on a ZSM-5 and a given binder and then, to estimate the impact of the zeolite nature (crystal size and Si/Al ratio). For the alumina-type binder, a partial pore blocking is suspected, independently of the crystal size and the Si/Al ratios. A phenomenon of alumination of the zeolite structure was found. For the silica-type binder, the critical parameter is the content of sodium cations inside the binder before the shaping. An ion exchange phenomenon was highlighted and the acid and catalytic properties of the materials collapse but in a reversible way. This impact increases when the crystal size decreases and when the Si/Al ratio increases
Mignard, Samuel. "Mode de désactivation des zéolithes : caractérisation des zéolithes cokées par adsorption de diverses molécules." Poitiers, 1988. http://www.theses.fr/1988POIT2297.
Full textDiallo, Mounguengui Modibo. "Modifications structurelles de zéolithes : application à la déshydratation du glycérol sur zéolithes substituées par le fer." Thesis, Poitiers, 2015. http://www.theses.fr/2015POIT2286/document.
Full textGlycerol is recoverable by dehydration into acrolein, which is an important chemical intermediate and can be converted into a variety of value-added products including acrylic acid that is the basis of many polymers. This reaction is carried out over acid catalysts, such as protonic zeolites which provide significant initial yields in the gas phase (275-325° C) and at atmospheric pressure. However, the main drawback of these materials is the rapid deactivation over time because of the formation of carbonaceous deposits known as "coke". The addition of iron over H-BEA (large pore) and H-MFI (mean pore) zeolites showed a highly beneficial effect on this reaction in the presence of air with an assumed formation of active species that would reduce significantly catalyst deactivation while promoting the direct formation of the acrylic acid on the metal function. H-MFI iron zeolites prepared by isomorphous substitution are the most efficient with a maximum acrylic acid yield of 40% obtained over H-Fe3.8-Z-45 (prepared by hydrothermal synthesis). Np-Fe0.6-MFI-41 zeolite (prepared by post-synthesis treatment in a fluoride medium) gives an acrolein yield of 80% after 24 hours of reaction, reproducible after regeneration. This catalyst is not only very active, selective to acrolein and stable but also regenerable, which places it among the best for this process
Kabouche, Karim. "Utilisation des zéolithes modifiées pour l'oxydation hydrothermale." Aix-Marseille 2, 2005. http://theses.univ-amu.fr.lama.univ-amu.fr/2005AIX22064.pdf.
Full textFrances, Laëtitia. "Radiolyse de l'eau confinée dans les zéolithes 4A : application à l'entreposage d'eau tritiée." Thesis, Besançon, 2014. http://www.theses.fr/2014BESA2061/document.
Full textSelf-radiolysis of tritiated water (HTO) adsorbed in zeolites 4A shows differences compared tofree-bulk water radiolysis. We studied the roles of zeolites on that. We took special care with the influence of water loading ratio. We first exposed zeolites toexternal irradiations, reproducing selectively the doseor the dose rate measured in the case of tritiated waterstorage. This strategy enables the characterising of the samples after their irradiation since they are notcontaminated by tritium. Those experiments revealedthe high stability of zeolites 4A. We used a secondapproach which consisted in studying the precise case of self-radiolysis of tritiated water, in order to obtain radiolytic yields representative of HTO storage. The comparison between the quantities of gas released when zeolites are exposed to the three different sources that we used (electrons accelerated at 10 MeV, ! released by radioactive decay of 137Cs and "- released by radioactive decay of tritium) revealed the strong influence of the dose rate. More over, whatever the irradiation source,zeolites 4A first favour hydrogen release andsecondarily oxygen release too. On the contrary,zeolites favour next a recombination between those radiolytic products, with a dependence on their water loading ratio. Several processes are discussed to explain such a phenomena, not noticed during the free-bulkwater radiolysis
Richard, Frédéric. "Acylation de composés benzofuraniques en présence de zéolithes." Poitiers, 1997. http://www.theses.fr/1997POIT2266.
Full textRichardeau, David. "Désulfuration profonde des essences par adsorption sur zéolithes." Poitiers, 2004. http://www.theses.fr/2004POIT2261.
Full textThe aim of this study is to determine the best adsorbent among several zeolites for removing thiophene from gasoline. Acidic faujasite zeolites (HFAU) are not suitable for this removal, since rapid condensation reactions of gasoline components may result from the presence of acidic sites. Such reactions would lead to the formation of bulky molecules which block the access of thiophene to the micropores. Adsorption of thiophene, diluted in n-heptane or in competition with an olefin or an aromatic, was studied on zeolites under their sodium form or partially exchanged with cesium. The advantage of these zeolites is that no reaction of condensation was observed. It was shown that the cesium exchange was in favor of the thiophene adsorption in the case of solutions with a high content in olefins. Moreover, for solutions which contain all of the competitors, the more the zeolite is basic the more the selectivity of adsorption is in favor of thiophene
Haw, Kok-Giap. "Synthèse In-Situ de Zéolithes Embryonnaires sur Matrices Poreuses." Caen, 2014. http://www.theses.fr/2014CAEN2063.
Full textEmbryonic zeolites formation in amorphous silica-alumina matrices is the primary goal of this thesis. The ultimate goal of the work is the preparation of catalysts for the conversion of bulky molecules. Three different approaches are employed in order to reach the goal. The study begins with the zeolitization of amorphous silica-alumina matrices by the crystallization of FAU-type material under hydrothermal treatment in alkaline solution. The work is further extended to synthesis of pentasil type zeolites. The study includes the selection, pre-treatment, and characterization of the amorphous matrices, preparation of the zeolite/matrix composites followed by their evaluation in the catalytic transformation of TiPBz (1,3,5-triisopropylbenzene), a model molecules simulating the conversion of bulky molecules. Another approach, called “nano casting”, that involves the use the embryonic zeolite seeds anchored to the matrix by means of cationic polymer, is developed. This nano casting approach can be used in two ways: i) repeated nano casting of embryonic seeds on a matrix followed by calcination; ii) nano casting of embryonic seeds followed by secondary growth under hydrothermal conditions. The relevance of individual experimental techniques and the analyses of the composites, i. E. , their structure, porosity, chemical composition, morphological features are presented. Furthermore, the excellent catalytic properties of the obtained composite catalyst are discussed
Bats, Nicolas. "Synthèse de nouvelles zéolithes en vue d'applications en déparaffinage." Mulhouse, 2004. http://www.theses.fr/2004MULH0778.
Full textMorin, Stéphane. "Mécanismes d'isomérisation des xylènes zur zéolithes et solides mésoporeux." Poitiers, 1997. http://www.theses.fr/1997POIT2304.
Full textBooks on the topic "Zéolithes"
Guisnet, Michel. Les zéolithes, un nanomonde au service de la catalyse. Les Ullis: EDP Science, 2006.
Find full textlibrary, Wiley online, ed. Zeolites in industrial separation and catalysis. Weinheim: Wiley-VCH, 2010.
Find full textGuisnet, Michel, and Fernando Ramôa. Les zéolithes. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0249-4.
Full textGuisnet, Michel, and Fernando Ramôa. Zéolithes: Un Nanomonde Au Service de la Catalyse. EDP Sciences, 2021.
Find full textKoningsveld, Henk van. Compendium of Zeolite Framework Types: Building Schemes and Type Characteristics. Elsevier Science & Technology Books, 2007.
Find full textKoningsveld, Henk van. Compendium of Zeolite Framework Types. Elsevier Science, 2007.
Find full textSels, Bert, and Leonid Kustov. Zeolites and Zeolite-Like Materials. Elsevier, 2016.
Find full textIntroduction to Zeolite Molecular Sieves, Volume 168, Third Edition (Studies in Surface Science and Catalysis) (Studies in Surface Science and Catalysis). 3rd ed. Elsevier Science, 2007.
Find full textBook chapters on the topic "Zéolithes"
"Index." In Les zéolithes, 255–56. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0249-4-020.
Full text"Chapitre 6 : Formation de « coke », désactivation et régénération des zéolithes acides." In Les zéolithes, 89–108. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0249-4-008.
Full text"Chapitre 5 : Sélectivité de forme en catalyse." In Les zéolithes, 75–88. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0249-4-007.
Full text"A.2. Les réacteurs catalytiques." In Les zéolithes, 247–50. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0249-4-018.
Full text"Chapitre 4 : Transformation d’hydrocarbures par catalyse acide sur zéolithes." In Les zéolithes, 61–74. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0249-4-006.
Full text"A.3. Caractéristiques essentielles des carburants automobiles : indice d’octane et indice de cétane." In Les zéolithes, 251–54. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0249-4-019.
Full text"Préface." In Les zéolithes, v—vi. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0249-4-001.
Full text"Chapitre 13 : Catalyse basique sur zéolithes." In Les zéolithes, 215–30. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0249-4-015.
Full text"Chapitre 3 : Caractérisation des catalyseurs zéolithiques." In Les zéolithes, 39–60. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0249-4-005.
Full text"Sommaire." In Les zéolithes, vii—xiv. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0249-4-toc.
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