Catalytic combustion of methane over rare earth stannate pyrochlore

Sarohan Park; Hae Jin Hwang; Jooho Moon

doi:10.1023/A:1023626226464

Catalytic combustion of methane over rare earth stannate pyrochlore

Sarohan Park, Hae Jin Hwang, Jooho Moon

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

53 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 _1.8Mn_0.2O₇ shows highest the catalytic activity. Light-off and complete oxidation temperatures were measured at about 400 and 650°C, respectively.

Original language	English
Pages (from-to)	219-223
Number of pages	5
Journal	Catalysis Letters
Volume	87
Issue number	3-4
DOIs	https://doi.org/10.1023/A:1023626226464
Publication status	Published - 2003 Apr

Bibliographical note

Funding Information:
This research was supported in part by Grant No. 2001-C-CT03-P-01 from the Korea Energy Management Corporation.

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)

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title = "Catalytic combustion of methane over rare earth stannate pyrochlore",

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.",

author = "Sarohan Park and Hwang, {Hae Jin} and Jooho Moon",

note = "Funding Information: This research was supported in part by Grant No. 2001-C-CT03-P-01 from the Korea Energy Management Corporation.",

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AU - Park, Sarohan

AU - Hwang, Hae Jin

AU - Moon, Jooho

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N2 - 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.

AB - 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.

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