Reactivity of perovskites on oxidative coupling of methane
| Autor: | M. Teymouri, C. Petit, Jean-Luc Rehspringer, E. Bagherzadeh, S. Libs, Alain Kiennemann |
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| Rok vydání: | 1995 |
| Předmět: |
Materials science
Scanning electron microscope Mechanical Engineering Inorganic chemistry Analytical chemistry Crystal structure chemistry.chemical_compound chemistry Mechanics of Materials Ternary compound Yield (chemistry) X-ray crystallography General Materials Science Oxidative coupling of methane Reactivity (chemistry) Perovskite (structure) |
| Zdroj: | Journal of Materials Science. 30:3005-3009 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/bf00349675 |
| Popis: | Well-defined structures like ABO3 (A = Ba, Sr, Ca; and B = Ti, Zr) perovskites were prepared by a sol-gel method which permits the formation of a crystalline structure at low-calcination temperatures (∼700 °C). The perovskite structures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) methods and the carbonate present at the surface was determined by Fourier transform infra-red spectroscopy. Reactivity studies showed that the perovskite structures are stable under oxidative coupling of methane (OCM) conditions. The yield increases followed the sequence Ca < Sr < Ba and Zr < Ti, and a stable BaTiO3 gives a C2 yield of 15% at 800 °C. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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