Berlin 2008 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 13: Heterogeneous Catalysis
O 13.7: Vortrag
Montag, 25. Februar 2008, 15:30–15:45, HE 101
Methane Oxidation on Gold — •Guido Walther1, Glenn Jones1, Søren Jensen2, and Sebastian Horch1 — 1CAMD, Department of Physics, DTU, 2800 Lyngby, Denmark — 2MIC, Department of Micro and Nanotechnology, DTU, 2800 Lyngby, Denmark
Since transportation of methane from the sources to the consumers requires low temperature and high pressure, there is a keen interest in transforming methane into methanol. This study aims at investigating the fundamental process of methane oxidation on gold.
In a millireactor setup, methane oxidation was studied on various gold catalysts. The reaction products were analyzed using a gas chromatograph and a mass spectrometer. To study the trend in activity of gold, a couple of catalysts of different particle sizes were used. Additional experiments were performed on a few gold catalysts of the same particle size, but different support materials, to emphasize the support effect in terms of trends in stability. TEM analysis before and after catalytic reactions document changes in particle size and shape.
Partial methane oxidation could not be observed on these catalysts. This is consistent with the thermodynamics, which show that there is a strong tendency of CO2 formation.