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Role of lattice oxygen during CO2 reforming of methane over NiO/MgO solid solutions (1998)

Ruckenstein, Eli ; Hu, Yun Hang

Springer

Catalysis letters 51 (1998), S. 183-185

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Details

ISSN: 1572-879X

Schlagwort(e): CH4 ; CO2 ; Ni ; MgO ; lattice oxygen ; transient response

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Abstract The CO2 reforming of methane over reduced NiO/MgO solid solution catalysts was studied at 800°C by a novel transient method, which couples a broadened pulse of CH4/CO2 with a step change to the carrier gas and/or with a sharp isotopic pulse of either 18O4, CO18 2 or 13CO16 2. The response curves indicated that two kinds of oxygen were formed over the catalysts during reaction: adsorbed oxygen which reacts fast with C species and lattice oxygen which reacts more slowly with C species. One concludes that a redox cycle of lattice oxygen formation through the oxidation of Ni and its reaction with C species takes place on the catalyst surface.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1019030311127

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