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Titolo:
Hydrogenation of cyclohexanone on nickel-tungsten sulfide catalysts
Autore:
Olivas, A; Samano, EC; Fuentes, S;
Indirizzi:
UNAM, Ctr Ciencias Mat Condensada, Ensenada 22800, Baja California, MexicoUNAM Ensenada Baja California Mexico 22800 22800, Baja California, Mexico
Titolo Testata:
APPLIED CATALYSIS A-GENERAL
fascicolo: 1-2, volume: 220, anno: 2001,
pagine: 279 - 285
SICI:
0926-860X(20011025)220:1-2<279:HOCONS>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
MO HYDRODESULFURIZATION CATALYSTS; CRYSTALLINE PHASES; PROMOTER; ALUMINA; CO;
Keywords:
nickel-tungsten sulfide; WS2; cyclohexanone; cyclohexene; hydroprocessing; heterocompounds; hydrodesulfuration; hydrodenitrogenation; hydrodeoxygenation; heteroatoms; hydrotreating; ammonium thiotungstate; ammonium metatungstate; thiosalt; Ni-S (millerite);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Olivas, A Univ So Calif, Dept Chem, SSC 617,920W,37th St, Los Angeles, CA 90089 USA Univ So Calif SSC 617,920W,37th St Los Angeles CA USA 90089 USA
Citazione:
A. Olivas et al., "Hydrogenation of cyclohexanone on nickel-tungsten sulfide catalysts", APP CATAL A, 220(1-2), 2001, pp. 279-285

Abstract

Unsupported Ni-W sulfide catalysts were tested for cyclohexanone hydrogenation under atmospheric pressure conditions and showed a high selectivity towards cyclohexene. They were prepared employing ammonium thiotungstate complexes and nickel nitrate as metal-sulfide precursors. The data of catalyticactivity show a synergetic effect as a function of stoichiometric composition, R = Ni/(Ni + W). A maximum synergetic effect occurred at R = 0.7. The texture and surface composition characterization of the catalysts were carried out by BET surface area measurements, AES and XPS. The surface of catalysts was found to be nickel deficient, compared to the nominal values, as determined by AES and XPS. The electronic state of Ni changed as the catalyst stoichiometry varied, but the electronic state of W did not change. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 03:52:40