Catalytic properties of Ag-SnO2 catalysts applied in low-temperature methane oxidation

• Autorzy: Lewandowska A , Kocemba I. , Rynkowski J.
• Języki publikacji: EN

Abstrakty

EN

This paper focuses on the catalytic properties of Ag/SnO₂ for low-temperature methane oxidation. The influences of the metal loading (0.2-20 wt.% Ag), support (Al₂O₃, TiO₂, SiO₂) and methane concentration (0.375-1.5%) in the oxidized mixture were investigated. It was observed that the optimal amount of silver in Ag/SnO₂ was 1 wt.%. Lower or higher amounts cause a loss in catalytic activity. SnO₂ was found to be undoubtedly the best support for the title reaction among all tested oxides. A mechanism of methane oxidation over Ag/SnO₂ was proposed.

Słowa kluczowe

EN

catalytic property; metal loading; methane concentration; silver; methane oxidation; carbon dioxide; global warming; greenhouse gas emission

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2008
• Tom: 17
• Numer: 3
• Opis fizyczny: p.433-437,fig.,ref.

Twórcy

autor

Lewandowska A

• Technical University of Lodz, Zeromskiego 116, 90-924 Lodz, Poland

autor

Kocemba I.

autor

Rynkowski J.

Bibliografia

• 1. SU S., AGNEW J. Catalytic combustion of coal mine ventilation air methane. Fuel 85, 1201, 2006.
• 2. WIDJAJA H., SEKIZAWA K., EGUCHI K., ARAI H. Oxidation of methane over Pd/mixed oxides for catalytic combustion. Catal. Today 47, 95, 1999.
• 3. SEKIZAWA K., WIDJAJA H., MAEDA S., OZAWA Y.,EGUCHI K. Low temperature oxidation of methane over Pd/SnO₂ catalysts. Appl. Catal. 200, 211, 2000.
• 4. URFELS L., GELIN P., PRIMET M., TENA E. Complete oxidation of methane at low temperature over Pt catalysts supported on high surface SnO₂. Topics in Catalysis, 30/31, 2004.
• 5. WANG S., ZHAO Y., WANG Y., KONG F., WU S., ZHANG S., HUANG W. Preparation and CO gas-sensing behavior of Au-doped SnO₂ sensors. Vacuum 81, 394, 2006.
• 6. CABOT A., VILA A., MORANTE J.R. Analysis of the catalytic activity and electrical characteristics of different modified SnO₂ layers for gas sensors. Sensors and Actuators B, 84, 12, 2002.
• 7. GRZYBOWSKA-ŚWIERKOSZ B. Elementy katalizy heterogenicznej, PWN Warszawa, pp. 180, 1993.
• 8. NAGASAWA Y., CHOSO T., KARASUDA T., SHIMOMURA S., OUYANG F., TABATA K., YAMAGUCHI Y. Photoemission study of the interaction of a reduced thin film SnO₂ with oxygen. Surf. Sci. 433-435, 226, 1999.
• 9. KAWABE T., SHIMOMURA S., KARASUDA T., TABATA K., SUZUKI E., YAMAGUCHI Y. Photoemission study of dissociatively adsorbed methane on a pre- oxidized SnO₂ thin film. Surf. Sci. 448, 101, 2000.
• 10. YAMAGUCHI Y., TABATA K., SUZUKI E. Density functional theory calculations for the interaction of oxygen with reduced M/SnO₂ (110) (M = Pd, Pt) surfaces. Surf. Sci. 526, 149, 2003.
• 11. WEISZ P.B. J. Chem. Phys. 21, 1531, 1953.
• 12. KOCEMBA I., CHYLAK I., RYNKOWSKI J. Comparison of Pt/TiO₂ with Pt/SnO₂ in catalyst properties revealed in the selective oxidation of CO run in presence of H₂. Przem. Chem., 85, 737, 2006.