Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Christophe Nedez"'
Publikováno v:
Comptes Rendus Chimie. 7:785-796
Thermolysis of the organometallic complex SiOSn(n-C4H9)3 1 grafted on silica dehydroxylated either at 200 (silica(200)) or 500 °C (silica(500)) can be interpreted by assuming two decomposition pathways: (i) hydrolysis of the butyl groups by silan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2998ab6632a9774bfc1cf9a7676568e4
https://doi.org/10.1016/j.crci.2003.09.013
https://doi.org/10.1016/j.crci.2003.09.013
Autor:
Xu Xu Wang, Mariko Adachi, Frédéric Lefebvre, François Bayard, Christophe Nedez, Jean-Marie Basset, Véronique Dufaud
Publikováno v:
Journal of Molecular Catalysis A: Chemical. :443-455
The organometallic complex SiOZr(CH2C(CH3)3)3 was synthesized on the surface of silica dehydroxylated at 500 °C and its reactivity towards oxygenated molecules was studied. The materials were characterized by IR, 13 C CP-MAS NMR, analysis o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7608eb2cf258ebd3eb61ac5430158087
https://doi.org/10.1016/s1381-1169(03)00326-1
https://doi.org/10.1016/s1381-1169(03)00326-1
Autor:
E. Laperdrix, Christophe Nedez, Jean Claude Lavalley, Abdelaziz Sahibed-Dine, Guylène Costentin, Odette Saur, A.B. Mohamed Saad, Mohammed Bensitel
Publikováno v:
Applied Catalysis B: Environmental. 26:71-80
Sulfate species formed by heating SO2 in excess of O2 at 723 K on TiO2, ZrO2, Al2O3 and Al2O3 promoted by Fe, Cu, Ni, Mo, W or V were studied by FT-IR spectroscopy. The presence of Ni, Cu or Fe enhance sulfate formation on the alumina support. The su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5480dedba04cef197315e15a11536d4d
https://doi.org/10.1016/s0926-3373(00)00108-9
https://doi.org/10.1016/s0926-3373(00)00108-9
Autor:
J. Nougayrède, Odette Saur, Guylène Costentin, E. Laperdrix, S. Savin-Poncet, Christophe Nedez, Jean-Claude Lavalley
Publikováno v:
Journal of Catalysis. 189:63-69
A CuO/Al 2 O 3 catalyst was used for selective oxidation of hydrogen sulfide into sulfur at low temperature (383 K). H 2 S is totally consumed during the 28 first hours of the reaction, without detection of SO 2 nor S n . The decrease of H 2 S conver
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7db15d799f041c8daa305a61630fd88e
https://doi.org/10.1006/jcat.1999.2691
https://doi.org/10.1006/jcat.1999.2691
Publikováno v:
Catalysis Reviews. 40:409-450
This review article deals with the development of sulfur recovery from the Claus process to H2S selective oxidation. Governments are constantly tightening regulations to limit the emission of sulfur compounds into the air. This makes it necessary to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33d056dc68c5469405b851d117d66784
https://doi.org/10.1080/01614949808007113
https://doi.org/10.1080/01614949808007113
Autor:
Christophe Nedez, A Aboulayt, Odette Saur, J.L Ray, Jean-Claude Lavalley, Guylène Costentin, I Justin, E. Laperdrix
Publikováno v:
Applied Catalysis B: Environmental. 17:167-173
The study is devoted to the comparison between the activity of γ-alumina and titania (anatase) toward CS2 hydrolysis. It is shown that, without any other sulfur compound, like H2S and SO2, and without O2 traces in the feed, alumina is more active th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f26838ee556667cb86d30be86987473b
https://doi.org/10.1016/s0926-3373(98)00014-9
https://doi.org/10.1016/s0926-3373(98)00014-9
Publikováno v:
Journal of the Chemical Society, Faraday Transactions. 93:1987-1992
The thermolysis of Si–O–SnMe 3 grafted onto partially dehydroxylated silicas has been studied by in situ IR, 13 C CP MAS NMR and TPD. The only detected gaseous product was methane, showing that the thermolysis process passes through a simple hydr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ae2222ef3c74f292e4a177241fc2cae
https://doi.org/10.1039/a607613k
https://doi.org/10.1039/a607613k
Autor:
Christophe Nedez, Jean-Louis Ray
Publikováno v:
Catalysis Today. 29:139-142
We have developed a new Claus alumina which presents a particular ultramacroporosity, between 0.1 and 1 μm (to reduce diffusional constraints) and a well-defined soda content (below 2500 ppm Na 2 O) to reduce the sulfation of the surface and, thus,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58ec25dec30fa7b33e5d544890745eca
https://doi.org/10.1016/0920-5861(95)00293-6
https://doi.org/10.1016/0920-5861(95)00293-6
Autor:
Christophe Nedez, Jean-Louis Ray
Publikováno v:
Catalysis Today. 27:49-53
The discovery of two new concepts have made it possible to draw the physico-chemical map of the best alumina Claus catalyst. An optimized profile of the ultramacroporosity, between 0.1 and 1 μm, reduces diffusional constraints. A low sodium (Na 2 0)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50e5b306109d9cd1c30acfddcacc041b
https://doi.org/10.1016/0920-5861(95)00171-9
https://doi.org/10.1016/0920-5861(95)00171-9
Publikováno v:
J. Chem. Soc., Faraday Trans.. 92:3419-3423
The thermal transformation in vacuo of the well defined surface organometallic fragments [AlO]xSn(n-C4H9)3(x= 1,2) 1 grafted on various partially dehydroxylated aluminas (α, γ, η) has been investigated. The surface reactions were followed by quali
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8539f5ecace6e5a60fef697d21bd7ea9
https://doi.org/10.1039/ft9969203419
https://doi.org/10.1039/ft9969203419