Literatura académica sobre el tema "Catalyse or/silicium"
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Artículos de revistas sobre el tema "Catalyse or/silicium"
Bumba, Jakub, Vladislav Drinek, Pavel Krystynik, Pavel Dytrych y Olga Solcova. "Nickel Silicide Catalyst from Photovoltaic Waste for the Methanation Reaction". Minerals 11, n.º 12 (14 de diciembre de 2021): 1412. http://dx.doi.org/10.3390/min11121412.
Texto completoDu, Jun, Jiao Liu, Hua Qiang Fu, Bu Hui Li y Qi Wu. "Recent Progress in Titanium Silicide Nanowires: Properties, Preparations and Applications". Applied Mechanics and Materials 446-447 (noviembre de 2013): 50–54. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.50.
Texto completoZhang, Liangliang, Xiao Chen, Yujing Chen, Zhijian Peng y Changhai Liang. "Acid-tolerant intermetallic cobalt–nickel silicides as noble metal-like catalysts for selective hydrogenation of phthalic anhydride to phthalide". Catalysis Science & Technology 9, n.º 5 (2019): 1108–16. http://dx.doi.org/10.1039/c8cy02258e.
Texto completoBurnstine-Townley, Alex A., Sajia Afrin, Yuen Yee Li Sip, David Fox y Lei Zhai. "In Situ Formation of Nanoparticles on Carbon Nanofiber Surface Using Ceramic Intercalating Agents". Journal of Composites Science 6, n.º 10 (11 de octubre de 2022): 303. http://dx.doi.org/10.3390/jcs6100303.
Texto completoLiang, Mei-Keat, Siddharth V. Patwardhan, Elena N. Danilovtseva, Vadim V. Annenkov y Carole C. Perry. "Imidazole catalyzed silica synthesis: Progress toward understanding the role of histidine in (bio)silicification". Journal of Materials Research 24, n.º 5 (mayo de 2009): 1700–1708. http://dx.doi.org/10.1557/jmr.2009.0223.
Texto completoKarabulut, Deniz y Sema Akyalcin. "Friedel-Crafts alkylation of benzene with benzyl alcohol over H-MCM-22". International Journal of Chemical Reactor Engineering 19, n.º 5 (28 de abril de 2021): 541–51. http://dx.doi.org/10.1515/ijcre-2020-0175.
Texto completoLiu, Xin, Cai Liu y Changgong Meng. "Oligomerization of Silicic Acids in Neutral Aqueous Solution: A First-Principles Investigation". International Journal of Molecular Sciences 20, n.º 12 (21 de junio de 2019): 3037. http://dx.doi.org/10.3390/ijms20123037.
Texto completoTeh, Aun Shih, Daniel C. S. Bien, Rahimah Mohd Saman, Soo Kien Chen, Kai Sin Tan y Hing Wah Lee. "Multiwalled Carbon Nanotube Growth Mechanism on Conductive and Non-Conductive Barriers". Advanced Materials Research 403-408 (noviembre de 2011): 1201–4. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.1201.
Texto completoSharma, Anjali, Prabhjot Kaur, Sulekha Chahal, Bindu Battan y Jitender Sharma. "Relative abundance of silicolytic bacteria in different habitats and its statistical analysis". Research Journal of Chemistry and Environment 27, n.º 7 (15 de junio de 2023): 84–91. http://dx.doi.org/10.25303/2707rjce084091.
Texto completoMeng, Xiang, Hiroaki Suzuki, Kenta Sasaki y Hirokazu Tatsuoka. "Characteristic Modification of Catalysts by Use of a Chloride Source". Solid State Phenomena 247 (marzo de 2016): 106–10. http://dx.doi.org/10.4028/www.scientific.net/ssp.247.106.
Texto completoTesis sobre el tema "Catalyse or/silicium"
Ducos, Paul. "Synthèse de nouveaux acides de Lewis silylés pour la catalyse organique". Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0439/document.
Texto completoIn contrast with carbocations which existence was unambiguously proven in the early 60’s, silylium ions (R3Si+) have remained for a long time elusive species and putative intermediates in many transformations involving organosilicon compounds. It was only in 2002 that the first structural proof (X-ray crystallography) dispelled any doubt about the existence of tricoordinated silicon cations in the condensed phase. Silylium ions are extremely electrophilic, able to coordinate to weak Lewis bases including solvent molecules such as benzene. The possibility to tame this acidity through an appropriate labile coordination even widens the scope of applications of these reactive species and allows their use as catalysts for organic synthesis. The aim of this thesis was to synthesize new stabilized silyliums ions and rationalize the impact of this stabilization onto the reactivity. In a first part, we focused on the use of hindered nitrogen derivatives to stabilize the silicon center. The nature and the strength of the interaction were assessed by NMR spectroscopy and theoretical calculations. In a second part, the introduction of chirality onto the silicon cation has been studied. A series of binaphtyl templated silyliums bearing an intramolecular Lewis base were synthesized. According to the strength of the stabilization, the chiral information present on the silicon can be persistent and used for asymmetric catalysis
Pascaretti, Mathieu. "Catalyse synergique οr/silicium par activatiοn d’οrganοsilanes et d’hydrοsilanes au mοyen de cοmplexes d’Au(Ι) : dévelοppements et applicatiοns". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMLH01.
Texto completoSince the early 2000s, gold catalysis has developed particularly well in organic chemistry, offering new highly efficient synthetic methods, generally under very mild conditions. These advances have also led to abundant use in glycoscience, but despite important breakthroughs, the application of gold catalysis in glycochemistry is typically limited to conventional modes of sugar donor activation, in which the gold complex remains strictly confined to the role of a σ- or π-Lewis acid. The research work presented through this manuscript tends to introduce a new paradigm in gold-catalysed glycosylation reactions, by developing catalytic alkynylation reactions in which the gold complex should overcome the intrinsic difficulties of these couplings by contributing to the simultaneous activation of the sugar donor and the alkyne aglycone, based on an original gold/silicon synergistic catalysis strategy. The ideal combination of gold catalyst and counterion was sought (L and X) to achieve optimum catalytic reactivity and stereochemical control both for the alkynylation reaction of simple saturated glycosides and for the alkynylation of glycals. The discovery of a major impact of a hitherto unexploited Au(I) complex counterion in synergistic gold/silicon catalysis associated with a strongly deactivating phosphine has made it possible to extend the field of application of synergistic gold/silicon catalysis beyond the alkynylation of glycosides
Leroux, Denis. "Polystyrène sulfoné supporté sur silice poreuse : greffage et activité en catalyse acide". Lyon 1, 1994. http://www.theses.fr/1994LYO10290.
Texto completoBrouty, Marie-Sophie. "Recherche de nouveaux catalyseurs acides supportés de type polyphénylsilsesquioxanes chlorés sulfonés greffés sur silices". Lyon 1, 1995. http://www.theses.fr/1995LYO10135.
Texto completoLecomte, Sandrine. "Préparation des diénolates de potassium à partir des diénoxysilanes et du tertiobutylate de potassium : Etude de leur condensation régiosélective avec les dérivés carbonylées. Mise au point d'une méthode de prénylation". Rouen, 1997. http://www.theses.fr/1997ROUES072.
Texto completoMadani, Behrang. "Synthèse de Fischer-Tropsch sur catalyseur à base de cobalt supporté sur carbure de Silicium". Université Louis Pasteur (Strasbourg) (1971-2008), 2005. https://publication-theses.unistra.fr/public/theses_doctorat/2005/MADANI_Behrang_2005.pdf.
Texto completoThe Fischer-Tropsch synthesis (FTS) leads to various products, mainly alkanes as well as olefins and alcohols, starting with precise mixture of CO and H2. Currently, natural gas is recovered as a by-product of oil extraction and directly burnt, which leads a non negligible economic loss as well as an atmospheric pollution due to the production of CO2. The reaction of FTS is one of the ways permitting valorisation of natural gas after its transformation in gas of synthesis (mixture of CO and H2). The SFT reaction is exothermique and requires fast evacuation of heat from the catalytic sites in order to avoid the problem of hot spots formation and subsequent cracking of formed products. The supports used traditionally for the FTS are insulating supports, such as alumina and silica, which does not permit a good evacuation of heat. In this work, we replaced the insulating support by a conducting support based on SiC, which permits a better homogenisation of the temperature in the catalytic bed. In this study, different reaction parameters- the Co content, the total pressure and contact time, have been optimized in order to obtain the best activity, selectivity and stability of the catalysts. We also studied the influence of the morphology of the support on the catalyst performance. Among the different shapes of support based on SiC (grain, extrudes and foam), the support as foam seems to have the best performance. We finalised the procedures of regeneration of the catalyst as well as the doping by molybdenum. The thus obtained catalysts present the best activity and selectivity
De, Tymowski Benoît. "Synthèse de Fischer Tropsch sur support conducteur à base de carbure de silicium". Phd thesis, Université de Strasbourg, 2012. http://tel.archives-ouvertes.fr/tel-00855282.
Texto completoGarcia, Cervantes Gabriela. "Préparation et caractérisation de catalyseurs palladium sur supports thermoconducteurs (Si3N4, SiC, Cdiamant) : performances en catalyse d'hydrogénation du butadiène-1,3 et/ou d'oxydation totale du méthane". Lyon 1, 2004. http://www.theses.fr/2004LYO10074.
Texto completoTymowski, Benoît de. "Fischer Tropsch synthesis on conductive silicon carbide based support". Thesis, Strasbourg, 2012. http://www.theses.fr/2012STRAF019/document.
Texto completoThe Fischer-Tropsch synthesis (FTS) allows the transformation of a mixture of synthesis gas, i.e. H2 and CO, into valuable liquid hydrocarbons. The catalysts generally used in FTS are based on iron or cobalt supported on alumina or silica. ln the present work, silicon carbide (SiC) has been proposed as a replacement media to traditional supports. The results obtained indicate that the mesoporous SiC containing cobalt catalyst exhibits a good FTS activity and an extremely high selectivity towards liquid hydrocarbons compared to other FTS catalysts supported on alumina or silica. The FTS activity on the Co/SiC catalyst can be improved by changing the impregnation solvent or by promoting the cobalt phase with trace amount of noble metal. The doping of the SiC support with Ti02 phase also significantly improves the FTS activity keeping a similar high selectivity thanks to the formation of small cobalt particles in contact with the Ti02 phase
A, Ahad Hadad Caroline. "Valorisation de pentoses via la synthèse de glycodendrimères". Reims, 2008. http://theses.univ-reims.fr/exl-doc/GED00000979.pdf.
Texto completoWith the aim of developing renewable ressources from the region of Champagne-Ardenne, we synthesized glycodendrimers, starting from two pentoses (D-xylose and L-arabinose), usable in micellar reactions or like artificial receptors in biomedical field. The first part of this memory relates to the synthesis of nitrogen-based glycodendrimers starting from PAMAMs (PolyAMidoAMines) or PPIs (PolyPropylene Imines) having both the functions amines on the surface. By reaction of condensation between these functions and the pentonolactones, resulting from the two pentoses, we succeeded in obtaining glycodendrimers of first generation. However optimization with the higher generations remains to be developed. Then, in a second part, we wanted to obtain silicon glycodendrimers starting from three kinds of reaction: hydrosilylation, silylation and click chemistry. No convincing results were obtained starting from the reactions of hydrosilylation some either catalyst used and some length of the chain. On the other hand, small molecules and dendrimers of first generation were obtained by a sequence “hydrosilylation/condensation” and by reaction of silylation. Glycodendrimers of generation 1 to 3 were obtained by click chemistry but the method of purification remains to be developed. Lastly, the third part appeared much more encouraging because we succeeded in obtaining the phosphorated first glycodendrimers, starting from a derivative of D-xylose, of generations 1 to 3 by reaction of substitution with quantitative yields. A simple method of purification by successive precipitations was also developed as well as the deprotection of the acetyls groups
Capítulos de libros sobre el tema "Catalyse or/silicium"
Sato, H., K. Hirose, M. Kitamura y Y. Nakamura. "A Vapor Phase Beckmann Rearrangement Over High-Silicious ZSM-5". En Studies in Surface Science and Catalysis, 1213–22. Elsevier, 1989. http://dx.doi.org/10.1016/s0167-2991(08)62007-8.
Texto completoPál-Borbély, G. y A. Auroux. "Acidity of isomorphically substituted crystalline silicic acids with layer structure. I. H-magadiite". En Studies in Surface Science and Catalysis, 55–62. Elsevier, 1995. http://dx.doi.org/10.1016/s0167-2991(06)81206-1.
Texto completoChen, Xiao, Anqi Zhao, Zhengfeng Shao, Zhiqiang Ma y Changhai Liang. "A novel approach to synthesize highly selective nickel silicide catalysts for phenylacetylene semihydrogenation". En Scientific Bases for the Preparation of Heterogeneous Catalysts - Proceedings of the 10th International Symposium, Louvain-la-Neuve, Belgium, July 11-15, 2010, 77–84. Elsevier, 2010. http://dx.doi.org/10.1016/s0167-2991(10)75010-2.
Texto completoGuan, Jingchao, Anqi Zhao, Xiao Chen, Mingming Zhang y Changhai Liang. "Chemical vapor deposition of Fe(CO)4(SiCl3)2 for the synthesis of hydrogenation catalyst made of highly dispersed iron silicide particles on silica". En Scientific Bases for the Preparation of Heterogeneous Catalysts - Proceedings of the 10th International Symposium, Louvain-la-Neuve, Belgium, July 11-15, 2010, 259–62. Elsevier, 2010. http://dx.doi.org/10.1016/s0167-2991(10)75037-0.
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