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Titolo:
Ni-Mo and Ni-W sulfide catalysts prepared by decomposition of binary thiometallates
Autore:
Pedraza, F; Fuentes, S;
Indirizzi:
Inst Mexicano Petr, Programa Simulac Mol, Mexico City 07730, DF, Mexico Inst Mexicano Petr Mexico City DF Mexico 07730 ico City 07730, DF, Mexico
Titolo Testata:
CATALYSIS LETTERS
fascicolo: 1-3, volume: 65, anno: 2000,
pagine: 107 - 113
SICI:
1011-372X(2000)65:1-3<107:NANSCP>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
HYDRODESULFURIZATION CATALYSTS; NICKEL;
Keywords:
thiometallates decomposition; hydrodesulfurization; Ni-Mo sulfide; Ni-W sulfide; synergistic effect;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Pedraza, F Inst Mexicano Petr, Programa Simulac Mol, Edif 23,Ofic 222,Eje Cent L Cardenas 152,Apdo Pos, Mexico City 07730, DF, Mexico Inst Mexicano Petr Edif 23,Ofic 222,Eje Cent L Cardenas 152,Apdo Pos Mexico City DF Mexico07730
Citazione:
F. Pedraza e S. Fuentes, "Ni-Mo and Ni-W sulfide catalysts prepared by decomposition of binary thiometallates", CATAL LETT, 65(1-3), 2000, pp. 107-113

Abstract

Ni-Mo and Ni-W sulfide catalysts with atomic ratio R = 0.5 (Ni/(Ni + M), with M = Mo or W) prepared by decomposition of Ni-impregnated thiometallateswere evaluated in the reaction of thiophene hydrodesulfurization. Catalysts derived from impregnated thiometallates (DTI samples) presented improved catalytic activity and higher synergistic effect than catalysts prepared byco-precipitation (HSP samples) despite the fact that co-precipitated catalysts showed larger surface area. Structure characterization by high-resolution electron microscopy (HREM) and X-ray diffraction (XRD) revealed different crystalline phases in DTI and HSP catalysts. A mixture of phases (MS2, NiS1.03 and MO2) was observed in catalysts obtained by co-precipitation. Only the poorly crystalline MS2 phase was observed in DTI catalysts suggestingthat the Ni promoter is very well dispersed on the chalcogenide structure.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 03:58:51