Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Hexagonal mesoporous silicas with and without Zr as supports for HDS catalysts
Autore:
Kostova, NG; Spojakina, AA; Jiratova, K; Solcova, O; Dimitrov, LD; Petrov, LA;
Indirizzi:
Bulgarian Acad Sci, Inst Catalysis, BU-1113 Sofia, Bulgaria Bulgarian AcadSci Sofia Bulgaria BU-1113 lysis, BU-1113 Sofia, Bulgaria Acad Sci Czech Republ, Inst Chem Proc Fundamentals, CR-16502 Prague 6, Czech Republic Acad Sci Czech Republ Prague Czech Republic 6 2 Prague 6, Czech Republic
Titolo Testata:
CATALYSIS TODAY
fascicolo: 2-4, volume: 65, anno: 2001,
pagine: 217 - 223
SICI:
0920-5861(20010220)65:2-4<217:HMSWAW>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR-SIEVES; HETEROPOLY ACID; MCM-41; ZEOLITE; HMS; NI; MO;
Keywords:
hydrodesulphurisation; mesoporous materials; zirconium-containing mesoporous silicas;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Kostova, NG Bulgarian Acad Sci, Inst Catalysis, BU-1113 Sofia, Bulgaria Bulgarian Acad Sci Sofia Bulgaria BU-1113 13 Sofia, Bulgaria
Citazione:
N.G. Kostova et al., "Hexagonal mesoporous silicas with and without Zr as supports for HDS catalysts", CATAL TODAY, 65(2-4), 2001, pp. 217-223

Abstract

Hexagonal mesoporous materials (HMS) with and without zirconium were used as supports for preparation of HDS catalysts, The catalysts prepared by modification of the supports with 12-phosphomolybdic acid (HPMo) were characterised by nitrogen adsorption, IR spectroscopy, TPD of ammonia, TPR and catalytic activity in thiophene hydrodesulphurisation. Parent silicas showed mesoporous structure with BET surface area between 1200 and 800 m(2) g(-1), pore size diameter around 3.3 nm and acidity around 0.3 mmol NH3 g(-1). Molybdenum catalysts possess stronger acidity than the supports used. The catalytic activities in hydrodesulphurisation of thiophene of the molybdenum containing catalysts prepared with HMS were higher than the activity of the catalyst prepared with amorphous silica. Higher acidity of Zr-HMS supports lead to lower stability in the thiophene conversion. (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 21/09/20 alle ore 12:38:31