About: Synergism between Ni and W in the NiW/gama-Al2O3 Hydrotreating Catalysts

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Řada NiW/gama-Al2O3 katalyzátorů (20 a 30 hm% W a 1–5 hm% Ni) byla připravena a studována metodami TPR a XPS. Byla nalezena 10-15x vyšší HDS aktivita NiW katalyzátorů. Důvodem je vysoká dispersita směsné NiWS fáze. (cs) A series of NiW/ c-Al2O3 catalysts (20 and 30 wt% W and 1–5 wt% Ni) have been prepared and studied by TPR and XPS. HDS activity has been tested in the thiophene conversion. The e?ect of Ni and W loadings on the formation of di?erent structures is presented. In the calcined catalysts several phases coexist, concentrations of which depend on the Ni/(Ni+W) atomic ratio. The Ni synergistic e?ect in the HDS reaction is con?rmed by the increase in the HDS activity ( 10–15 times). This e?ect is ascribed to the formation of an active NiWS phase of high dispersion from the mixed NiW oxide precursors. At higher Ni/Ni+W ratio a redistribution of active components in additional amount ofNiWS phase during sul?dation is suggested. A series of NiW/ c-Al2O3 catalysts (20 and 30 wt% W and 1–5 wt% Ni) have been prepared and studied by TPR and XPS. HDS activity has been tested in the thiophene conversion. The e?ect of Ni and W loadings on the formation of di?erent structures is presented. In the calcined catalysts several phases coexist, concentrations of which depend on the Ni/(Ni+W) atomic ratio. The Ni synergistic e?ect in the HDS reaction is con?rmed by the increase in the HDS activity ( 10–15 times). This e?ect is ascribed to the formation of an active NiWS phase of high dispersion from the mixed NiW oxide precursors. At higher Ni/Ni+W ratio a redistribution of active components in additional amount ofNiWS phase during sul?dation is suggested. (en)
Title	Synergism between Ni and W in the NiW/gama-Al2O3 Hydrotreating Catalysts Synergism between Ni and W in the NiW/gama-Al2O3 Hydrotreating Catalysts (en) Synergismus mezi Ni a W v NiW/gama-Al2O3 odsiřovacích katalyzátorech (cs)
skos:prefLabel	Synergism between Ni and W in the NiW/gama-Al2O3 Hydrotreating Catalysts Synergism between Ni and W in the NiW/gama-Al2O3 Hydrotreating Catalysts (en) Synergismus mezi Ni a W v NiW/gama-Al2O3 odsiřovacích katalyzátorech (cs)
skos:notation	RIV/67985858:_____/05:00028758!RIV06-AV0-67985858
http://linked.open.../vavai/riv/strany	45;52
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(AV0Z40720504)
http://linked.open...iv/cisloPeriodika	1-2
http://linked.open...vai/riv/dodaniDat	2006
http://linked.open...aciTvurceVysledku	Jirátová, Květa
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav chemických procesů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	545655
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/05:00028758
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	NiW/gama-Al2O3; Thiophene hydrodesulfurization; TPR, XPS (en)
http://linked.open.../riv/klicoveSlovo	TPR XPS NiW/gama-Al2O3 Thiophene hydrodesulfurization
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[1B671354C987]
http://linked.open...i/riv/nazevZdroje	Catalysis Letters
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...UplatneniVysledku	2005
http://linked.open...v/svazekPeriodika	104
http://linked.open...iv/tvurceVysledku	Jirátová, Květa Palcheva, R. Tyuliev, G. Spojakina, A. A. Petrov, L.
http://linked.open...n/vavai/riv/zamer	Investigation of multiphase reacting systems for the design of processes important in synthesis and preparation of novel materials, in energy production and in environmental protection
issn	1011-372X
number of pages	8 (xsd:int)

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