Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Jean-Louis Guille"'
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 96:855-864
This article deals with the correlation between preparation and HDS activity for NiMo and NiW catalysts. For NiMo catalysts, the successive impregnation or coimpregnation of molybdenum and nickel salts give the same activity. A TPR analysis shows tha
Publikováno v:
Journal of Sol-Gel Science and Technology. 25:207-213
A new process to control the distribution of metal nanoparticles is proposed. It involves the use of complexing microcapsules obtained by interfacial polycondensation. The latter are hollow spheres constituted of a polymer membrane, containing an ins
Publikováno v:
Materials Science and Engineering: C. 15:179-182
Monolithic samples containing 1 and 5 mol% of nickel(II) have been prepared. After thermal treatment Ni(II) is reduced to metallic Ni particles, the size of the particles and the inter-particles distances have been controlled by the nickel content an
Autor:
J.J. Grob, R. Poinsot, Mireille Richard-Plouet, Jean-Louis Guille, O Cı́ntora-González, Claude Estournès, Dominique Muller
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 178:144-147
Cobalt has been implanted at 30 and 160 keV in three different silica-based substrates. TEM observations and magnetization measurements performed at RT and 5 K show that, after implantation, cobalt is present both as metal particles, few nanometers i
Publikováno v:
Journal of Materials Science. 34:3189-3202
The influence of different parameters (temperature, duration and SiO source) on the synthesis of silicon carbide SiC according to the gas-solid reaction between SiO vapors and activated charcoal was investigated. The material obtained retained the ge
Autor:
Jean-Louis Guille, Marc-Jacques Ledoux, Jacques Werckmann, M. Benaissa, Gabrielle Ehret, Eric Peschiera
Publikováno v:
Journal of Materials Science. 29:4700-4707
The microstructure of active carbon used in the growth of a silicon carbide catalyst support has been studied by BET area measurements, electron diffraction and high-resolution electron microscopy. The microstructure of the active carbon is consisten
Publikováno v:
Journal of Non-Crystalline Solids. 170:287-294
The reduction of copper in soda-lime-silicate glasses by hydrogen was measured as a function of time and copper content within the temperature range 440 to 650°C. Copper is reduced to the metallic state in a surface layer whose thickness increases w
Publikováno v:
Journal of Catalysis. 143:249-261
Molybdenum carbide, prepared by a new synthetic route and further activated either by reductive or by oxidative treatments, has been studied as a catalyst for isomerization of 2- and 3-methylpentane and also for hydrogenolysis of cyclopentane, cycloh
Autor:
Marc-Jacques Ledoux, Eric Peschiera, Jean-Louis Guille, Jacques Werckmann, M. Benaissa, J.L. Hutchison
Publikováno v:
Journal of Crystal Growth. 131:5-12
The results of a high resolution transmission electron microscopy study on the growth of the catalytic support silicon carbide, obtained by reacting active carbon with silicon monoxide, are presented. On the basis of this study, it is concluded that
Autor:
Marc Gondolf, Jean-Louis Guille
Publikováno v:
Journal de Physique III. 3:815-822
Copper films were applied on low sintering temperature cordierite substrates either by sputtering or screen printing. Their behaviour during thermal treatments was studied as a function of various parameters: deposition technique, thickness, firing a