Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Jean Pierre Bonnelle"'
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 90:1261-1269
Typical Co or Ni-Mo-σAl2O3 hydrodesulphurisation catalysts are (partly) sulphided in the catalytic conditions and the questions about the structure, the sulphur content of the catalysts, the chemical state of the promotors are subject to controversi
Autor:
M. Breysse, P. Genested, J. L. Olive, J. Grimblot, J.C. Duchet, R. Durand, Claude Moreau, J. Bachelier, Christian Gachet, Jean-Pierre Bonnelle, C. Leclercq, J. C. Lavalley, Jean-Louis Portefaix, Roger Fréty, P. Engelhard, S. Kasztelan, Hervé Toulhoat, T. Decamp, M. Cattenot, M. Vrinat, C. Gueguen, Edmond Payen, Maxime Lacroix, Daniel Cornet, L. De Mourgues
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 96:829-844
Alumina supported NiW catalysts with components concentrations varying in a wide range were systematically studied in order to optimize a catalyst for further industrial uses. The genesis of the active phase was examined by using several physicochemi
Publikováno v:
Reaction Kinetics and Catalysis Letters. 62:203-208
Surface Potential Variations ΔΦ and XPS show the presence of S(a) on Cu after exposure to H2S. On such a presulfided state, H2S adsorbs molecularly and reversibly at room temperature. Exposure to SO2 mainly leads to the formation of S(a) and SOx(a)
Autor:
Anne Ponchel, Yolande Barbaux, Monique Rigole, Jean-Pierre Bonnelle, Dominique Courcot, Barbara Grzybowska, Michel Guelton
Publikováno v:
Scopus-Elsevier
Two series of K-promoted V 2 O 5 /TiO 2 catalysts were prepared by: (a) deposition of vanadia on K-doped TiO 2 support (TiK V preparations), and (b) deposition of K on vanadia-titania catalysts (TiV K preparation). They were characterized by 51 V NMR
Publikováno v:
Reaction Kinetics & Catalysis Letters. 58:229-235
Adsorption and transformation of O2, H2, water and methanol on polycrystalline copper in the 300–400 K range have been studied by surface potential variations. In particular, O2 reacts with H(a) to form OH(a) with a first order kinetic law, whereas
Publikováno v:
J. Chem. Soc., Faraday Trans.. 91:99-104
MeCeO oxides (Me = Cu2+, Mn2+, V4+, Mo5+), with an atomic ratio Me/Ce = 0.1, have been prepared by impregnation of ceria (CeO2) with the corresponding Me salt. Subsequently, the solids were oxidized or reduced at given temperatures. An EPR study evid
Publikováno v:
Journal of Catalysis. 144:544-555
Hydrogenation of 2-methylbuta-l,3-diene (isoprene) under helium flow in the absence of gaseous hydrogen is used to provide evidence for reactive hydrogen species (H*) present in copper-based oxides (CuCrO, CuAlO, CuZnO). These compounds are hydrogen
Publikováno v:
Reaction Kinetics & Catalysis Letters. 51:9-17
Electron microprobe analyses are used for characterizing the repartition of vanadium deposited during the hydrodemetallation of vanadyl octaethyl porphyrin on a classical Ni−MoS2-γ-Al2O3 catalyst. It is found that a part of vanadium can displace N
Publikováno v:
Applied Catalysis A: General. 101:73-93
In a previous article we selected a preparation process of cerium and nickel oxides which permits catalysts to be obtained which contain as much hydrogen as the intermetallic compounds with the same composition, and which are more active in benzene h
Publikováno v:
The Journal of Physical Chemistry. 97:5947-5953
The combination of several characterization techniques, i.e., surface area and porosimetry measurements, X-ray microprobe, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, temperature programmed desorption of ammonia, and ba