Search Results - "Delahay, G."

Reduction of Nitrogen Oxide by Ammonia over Vanadium Supported on Mixed Tungsten–Titanium-pillared Clays by Ferjani, W, Khalfallah Boudali, L, Delahay, G, Petitto, C

“…New pillared clay catalysts, vanadium supported on mixed tungsten–titanium-pillared clays, were prepared with various amounts of tungsten and then…”
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SCR of NO by NH3 catalyzed by Mo- and V-exchanged zeolite: Effect of Mo precursor salt by Mejri, I., Ayari, F., Mhamdi, M., Delahay, G., Ksibi, Z., Ghorbel, A.

“…V and Mo exchanged H+–ZSM-5 (Si/Al = 15) zeolite catalysts, prepared by solid-state ion exchange of ammonium metavanadate (2 wt.%) and different molybdenum…”
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Effect of vanadium on the behaviour of unsulfated and sulfated Ti-pillared clay catalysts in the SCR of NO by NH3 by ARFAOUI, J, KHALFALLAH BOUDALI, L, GHORBEL, A, DELAHAY, G

“…Vanadium supported on unsulfated and sulfated Ti-pillared clays are developed for the selective catalytic reduction (SCR) of nitrogen oxide (NO) by ammonia…”
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Selective catalytic reduction of NO with NH3 over Cr-ZSM-5 catalysts: General characterization and catalysts screening by Ayari, F., Mhamdi, M., Álvarez-Rodríguez, J., Ruiz, A.R. Guerrero, Delahay, G., Ghorbel, A.

“… Cr-ZSM-5 catalysts exhibited promising catalytic properties in SCR of NO with NH3 at low temperatures. Higher catalytic activities of Cr-ZSM-5 catalysts…”
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Catalytic decomposition of N2O and catalytic reduction of N2O and N2O + NO by NH3 in the presence of O2 over Fe-zeolite by Guzmán-Vargas, Ariel, Delahay, Gérard, Coq, Bernard

“…The decomposition of N2O, and the catalytic reduction by NH3 of N2O and N2O + NO, have been studied on Fe-BEA, -ZSM-5 and -FER catalysts. These catalysts were…”
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Ammoxidation of C2 hydrocarbons over Mo–zeolite catalysts prepared by solid-state ion exchange: Nature of molybdenum species by Mannei, E., Ayari, F., Mhamdi, M., Almohalla, M., Guerrero Ruiz, A., Delahay, G., Ghorbel, A.

“…Successful introduction of molybdenum (from MoCl3) into zeolites of different topologies was carried out using solid-state ion exchange. MOR like support…”
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Influence of the parent zeolite structure on chromium speciation and catalytic properties of Cr-zeolite catalysts in the ethylene ammoxidation by Ayari, F., Mhamdi, M., Hammedi, T., Álvarez-Rodríguez, J., Guerrero-Ruiz, A.R., Delahay, G., Ghorbel, A.

“…[Display omitted] ► Cr–S solids (S=ZSM-5, mordenite, beta, USY, Y) were tested in C2H4 ammoxidation. ► Cr species with high oxidation states play a key role in…”
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Effect of the chromium precursor nature on the physicochemical and catalytic properties of Cr–ZSM-5 catalysts: Application to the ammoxidation of ethylene by Ayari, F., Mhamdi, M., Debecker, D.P., Gaigneaux, E.M., Alvarez-Rodriguez, J., Guerrero-Ruiz, A., Delahay, G., Ghorbel, A.

“…The chromium precursor nature affects significantly the catalytic properties of Cr–ZSM-5 materials prepared by solid-state ion exchange. Catalytic behaviour…”
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Ammoxidation of ethylene over low and over-exchanged Cr–ZSM-5 catalysts by Ayari, F., Mhamdi, M., Álvarez-Rodríguez, J., Guerrero Ruiz, A.R., Delahay, G., Ghorbel, A.

“…[Display omitted] ► Cr–ZSM-5 solids were tested in the ammoxidation of ethylene into acetonitrile. ► Cr(VI) ions and Cr(III) oxide species coexist. ►…”
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Cr–ZSM-5 catalysts for ethylene ammoxidation: Effects of precursor nature and Cr/Al molar ratio on the physicochemical and catalytic properties by Ayari, F., Mhamdi, M., Álvarez-Rodríguez, J., Guerrero Ruiz, A.R., Delahay, G., Ghorbel, A.

“…[Display omitted] ► Cr–ZSM-5 solids with different metal loads were active in C2H4 ammoxidation. ► Exchanging CrCl3 and Cr acetate into ZSM-5 was elucidated by…”
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Selective Catalytic Reduction of Nitric Oxide by Ammonia over Cu-FAU Catalysts in Oxygen-Rich Atmosphere by Kieger, Stéphane, Delahay, Gérard, Coq, Bernard, Neveu, Bernard

“…The selective catalytic reduction (SCR) of NO (2000 ppm) by NH3(2000 ppm) in the presence of oxygen (3%) was carried out on Cu(x)-FAU (x=theoretical exchange…”
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Influence of the V + Mo/Al ratio on vanadium and molybdenum speciation and catalytic properties of V–Mo–ZSM-5 prepared by solid-state reaction by Mhamdi, M., Ghorbel, A., Delahay, G.

“…V–Mo–ZSM-5 catalysts with various composition prepared by solid-state ion exchange were investigated with respect to their physico-chemical characteristics…”
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Influence of the nature of titanium source and of vanadia content on the properties of titanium-pillared montmorillonite by Arfaoui, J., Boudali, L. Khalfallah, Ghorbel, A., Delahay, G.

“…Vanadia supported on titanium (Ti)-pillared montmorillonite, issued from different Ti-precursors, have been prepared and characterized. The physico-chemical…”
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Selective Catalytic Reduction of Nitrous Oxide by Ammonia on Iron Zeolite Beta Catalysts in an Oxygen Rich Atmosphere: Effect of Iron Contents by Delahay, G, Mauvezin, M, Coq, B, Kieger, S

“…A series of iron-exchanged zeolite beta (BEA) has been characterized by temperature programmed desorption (TPD) of oxygen and tested in the catalytic reduction…”
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Ammoxidation of ethylene to acetonitrile over chromium or cobalt alumina catalysts prepared by sol–gel method by Ayari, F., Mhamdi, M., Delahay, G., Ghorbel, A.

“…A series of Cr/Al 2 O 3 and Co/Al 2 O 3 catalysts were tested in the selective ammoxidation of ethylene to acetonitrile. Catalysts were prepared either by…”
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Identification of Iron Species in Fe−BEA:  Influence of the Exchange Level by Mauvezin, M, Delahay, G, Coq, B, Kieger, S, Jumas, J. C, Olivier-Fourcade, J

“…A series of Fe−zeolite-beta (Fe−BEA and 57Fe−BEA) has been prepared either by exchanging BEA (Si/Al = 12.5) with Fe(NO3)3 or by impregnation. The…”
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Characterization and catalytic performance of vanadium supported on sulfated Ti-PILC catalysts issued from different Ti-precursors in selective catalytic reduction of nitrogen oxide by ammonia by Arfaoui, J., Khalfallah Boudali, L., Ghorbel, A., Delahay, G.

“…Vanadium supported on sulfated Ti-pillared clay catalysts (STi-PILCs) issued from different Ti-precursors were investigated for selective catalytic reduction…”
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DRIFTS study of the nature and reactivity of the surface compounds formed by co-adsorption of NO, O2 and propene on sulfated titania-supported rhodium catalysts by FLORES-MORENO, Jorge Luis, DELAHAY, Gérard, FIGUERAS, Francois, COQ, Bernard

“…The selective reduction of NO with propene was investigated on sulfated TiO2 , either pure or containing 1 wt% Rh, using in situ diffuse reflectance Fourier…”
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Calorimetric and FTIR Study of the Acid Properties of Sulfated Titanias by Desmartin-Chomel, A, Flores, J. L, Bourane, A, Clacens, J. M, Figueras, F, Delahay, G, Fendler, A. Giroir, Lehaut-Burnouf, C

“…Titanium oxides of different surface areas were sulfated then calcined to convert the solid to a strong acid. The amount of sulfur retained by the solid and…”
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Selective catalytic reduction of NO on copper-exchanged zeolites: the role of the structure of the zeolite in the nature of copper-active sites by Torre-Abreu, C, Henriques, C, Ribeiro, F.R, Delahay, G, Ribeiro, M.F

“…Copper-exchanged zeolites with different structures (CuMFI, CuMOR and CuY) used as catalysts on the selective catalytic reduction (SCR) of NO by propene have…”
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