Autor:	Jooho Moon, Sarohan Park, Hae Jin Hwang
Rok vydání:	2003
Předmět:	Alkane chemistry.chemical_classification Stannate Inorganic chemistry Pyrochlore chemistry.chemical_element Catalytic combustion General Chemistry engineering.material Oxygen Catalysis Methane chemistry.chemical_compound chemistry Anaerobic oxidation of methane engineering Nuclear chemistry
Zdroj:	Catalysis Letters. 87:219-223
ISSN:	1011-372X
DOI:	10.1023/a:1023626226464
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c46761f8a058d3ae083824073e05eb0e https://doi.org/10.1023/a:1023626226464 Zobrazit plný text záznamu Full text from SpringerLink