Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Odette Saur"'
Autor:
Virginie Harle, Jean Claude Lavalley, A. M Le Govic, Philippe Bazin, Olivier Marie, Gilbert Blanchard, Marco Daturi, Odette Saur
Publikováno v:
Applied Catalysis B: Environmental
Applied Catalysis B: Environmental, Elsevier, 2012, 119 (DOI: 10.1016/j.apcatb.2012.02.037), pp.207--216
Applied Catalysis B: Environmental, Elsevier, 2012, 119 (DOI: 10.1016/j.apcatb.2012.02.037), pp.207--216
The reducibility of sulfate species by CO was studied over ceria and Ce0.63Zr0.37O2 mixed oxide with or without platinum, using infrared spectroscopy and thermogravimetry. The mechanism for sulfate reduction appeared to be based on three main points.
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
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
Publikováno v:
Journal of Catalysis. 187:385-391
Nickel iron phosphates were studied for the selective oxidation of hydrogen sulfide to sulfur. Nickel iron phosphate and Fe/Cr samples were more active than simple iron, chromium, and mixed iron–chromium oxides, which had been previously studied. N
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
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
Autor:
Maria Ziolek, A Aboulayt, Jean-Claude Lavalley, Izabela Nowak, J. Czyzniewska, Odette Saur, J. Kujawa
Publikováno v:
Applied Catalysis A: General. 171:109-115
The effect of sodium doping on alumina and zirconia activity in methanethiol formation from hydrosulphurisation of methanol by H 2 S was studied. It provoked an activity decrease and a selectivity increase in agreement with the catalysts basicity inc
Publikováno v:
Applied Catalysis B: Environmental. 13:265-274
The influence of platinum on ceria sulfation has been studied using thermogravimetry and infrared spectroscopy. The same types of sulfate species — surface and bulk-like species — are evidenced with or without Pt. Pt does not modify the thermal s
Publikováno v:
Solid State Ionics. 95:163-167
Adsorption and oxidation of SO2 on a CeO2Al2O3 solid have been studied by IR spectroscopy and gravimetry. Addition of CeO2 to A12O3 lowers the temperature of formation of sulfate, increases the amount formed and decreases the reduction temperature
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 112:125-132
The effect of SO2 chemisorption at 623 K on various metal oxides (CeO2, MgO, Al2O3, ZrO2, TiO2 anatase and rutile) has been studied by IR spectroscopy and catalytic tests: cumene cracking and isopropanol decomposition, IR spectroscopic studies of lut