Catalytic combustion of methane over rare earth stannate pyrochlore

Sarohan Park, Hae Jin Hwang, Joo Ho Moon

Research output: Contribution to journalArticle

47 Citations (Scopus)

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 Ln2Sn 2O7 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 (Sm2Sn 1.8Mn0.2O7 shows highest the catalytic activity. Light-off and complete oxidation temperatures were measured at about 400 and 650°C, respectively.

Original languageEnglish
Pages (from-to)219-223
Number of pages5
JournalCatalysis Letters
Volume87
Issue number3-4
DOIs
Publication statusPublished - 2003 Apr 1

Fingerprint

stannates
Methane
Rare earths
rare earth elements
methane
Oxidation
oxidation
Manganese
Powders
catalytic activity
manganese
Catalyst activity
Samarium
samarium
Oxygen vacancies
Temperature
temperature
pyrochlore
oxygen

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

Park, Sarohan ; Hwang, Hae Jin ; Moon, Joo Ho. / Catalytic combustion of methane over rare earth stannate pyrochlore. In: Catalysis Letters. 2003 ; Vol. 87, No. 3-4. pp. 219-223.
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Catalytic combustion of methane over rare earth stannate pyrochlore. / Park, Sarohan; Hwang, Hae Jin; Moon, Joo Ho.

In: Catalysis Letters, Vol. 87, No. 3-4, 01.04.2003, p. 219-223.

Research output: Contribution to journalArticle

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