Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
THE MICROMORPHOLOGY OF THE ACTIVATED IRON CATALYST USED FOR AMMONIA-SYNTHESIS
Autore:
WEINBERG G; BERAN B; MUHLER M; SCHLOGL R; DENT A; RAYMENT T;
Indirizzi:
MAX PLANCK GESELL,FRITZ HABER INST,FARADAYWEG 4-6 D-14195 BERLIN GERMANY MAX PLANCK GESELL,FRITZ HABER INST D-14195 BERLIN GERMANY SERC,DARESBURY LAB WARRINGTON WA4 4AD CHESHIRE ENGLAND UNIV CAMBRIDGE,DEPT PHYS CHEM CAMBRIDGE CB2 1EP ENGLAND
Titolo Testata:
Applied catalysis. A, General
fascicolo: 1-2, volume: 163, anno: 1997,
pagine: 83 - 99
SICI:
0926-860X(1997)163:1-2<83:TMOTAI>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
ZIRCONIUM PRECURSOR; MICROSTRUCTURE; REDUCTION; MODEL;
Keywords:
AMMONIA SYNTHESIS CATALYST; IRON CATALYST; MICROSTRUCTURE; HETEROGENEITY; SEM; EXAFS;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
G. Weinberg et al., "THE MICROMORPHOLOGY OF THE ACTIVATED IRON CATALYST USED FOR AMMONIA-SYNTHESIS", Applied catalysis. A, General, 163(1-2), 1997, pp. 83-99

Abstract

The internal microstructure of an industrial iron catalyst for ammonia synthesis was investigated using surfaces of electropolished grains of the catalyst which had operated for 240 h in ammonia synthesis under atmospheric pressure. Optical microscopy and SEM/EDX were used to investigate the disposition of several structural motives, The heterogeneity of distribution of the promoter oxides was confirmed to exist on all levels of resolution. The microstructural discrimination of the iron metal into several distinct features and the porous structure of the iron crystals were made visible. An EXAFS experiment on these catalyst particles confirms that all iron structures are made-up from bcc iron unit cells and that the discrimination of the iron species should result from textural rather than from atomic structural differences. (C) 1997 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 13:38:22