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Titolo:
PARTIAL OXIDATION OF METHANE TO SYNGAS OVER NI MGO, NI/CAO AND NI/CEO2/
Autore:
TANG S; LIN J; TAN KL;
Indirizzi:
NATL UNIV SINGAPORE,DEPT PHYS,SURFACE SCI LAB,10 KENT RIDGE CRESCENT SINGAPORE 119260 SINGAPORE
Titolo Testata:
Catalysis letters
fascicolo: 3-4, volume: 51, anno: 1998,
pagine: 169 - 175
SICI:
1011-372X(1998)51:3-4<169:POOMTS>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYNTHESIS GAS; SELECTIVE OXIDATION; NICKEL-CATALYSTS; OXIDE CATALYSTS; CARBON-DIOXIDE; CONVERSION; PEROVSKITE; NI; STEAM; CO;
Keywords:
PARTIAL OXIDATION OF METHANE (POM); SYNGAS; NICKEL CATALYST; CARBON DEPOSITION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
S. Tang et al., "PARTIAL OXIDATION OF METHANE TO SYNGAS OVER NI MGO, NI/CAO AND NI/CEO2/", Catalysis letters, 51(3-4), 1998, pp. 169-175

Abstract

Partial oxidation of methane to syngas at atmospheric pressure and 750 degrees C was examined over Ni/MgO, Ni/CaO and Ni/CeO2 catalysts with nickel loading of 13 wt%. All catalysts had similar high conversion of methane and high selectivity to syngas, which nearly approached thevalues predicted by thermodynamic equilibrium. However, only Ni/MgO showed high resistance to carbon deposition under thermodynamically severe conditions (CH4/O-2 = 2.5, a higher CH4 to O-2 ratio than the stoichiometric ratio). Its catalytic activity remained stable during 100 hof reaction, with no detectable carbon deposition. The oxidation of carbon deposited from pure CH4 decomposition and from pure CO disproportionation was investigated by in situ TFO-MS study which showed that both were effectively inhibited over Ni/MgO. In addition, the catalystswere characterized by TPR, XRD and XPS. It was revealed that the excellent performance of Ni/MgO resulted from the formation of an ideal solid solution between NiO and MgO.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 02:38:00