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- Title
Catalytic Combustion of Methane over Rare Earth Stannate Pyrochlore.
- Authors
Sarohan Park; Hae Jin Hwang; Jooho Moon
- Abstract
Well-defined Ln2Sn2O7 powders (Ln = La, Sm and Gd) with a phase-pure pyrochlore structure were synthesized by hydrothermal reaction. The catalytic activities of Ln2Sn2O7 powders for methane combustion were measured. Methane oxidation started at 500 °C and increased with oxidation temperature. Catalytic methane combustion is strongly influenced by the presence of oxygen vacancies that form by breaking Sn–O lattice bonds as the temperature increases. Addition of manganese to the rare earth pyrochlores improved methane oxidation activity. Manganese-doped samarium stannate pyrochlore (Sm2Sn1.8Mn0.2O7) shows highest the catalytic activity. Light-off and complete oxidation temperatures were measured at about 400 and 650 °C, respectively.
- Subjects
METHANE; ALKANES; MANURE gases; BIOGAS; ATMOSPHERIC methane; BROMOCHLOROMETHANE
- Publication
Catalysis Letters, 2003, Vol 87, Issue 3/4, p219
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1023/A:1023626226464