Catalytic combustion of premixed methane-in-air on a high-temperature hexaaluminate stagnation surface
| Autor: | Roderick W. Sidwell, Robert J. Kee, David T Wickham, Huayang Zhu |
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| Rok vydání: | 2003 |
| Předmět: |
Premixed flame
Microprobe General Chemical Engineering Radical Inorganic chemistry Flow (psychology) Analytical chemistry General Physics and Astronomy Energy Engineering and Power Technology Catalytic combustion General Chemistry Combustion Methane Catalysis chemistry.chemical_compound Fuel Technology chemistry |
| Zdroj: | Combustion and Flame. 134:55-66 |
| ISSN: | 0010-2180 |
| DOI: | 10.1016/s0010-2180(03)00064-6 |
| Popis: | Microprobe mass-spectrometric sampling is used to measure major species in a stagnation-point flow over a heated La0.267Sr0.333Mn0.4Al11O18 hexaaluminate catalyst surface. The temperature of the catalytic surface is controlled, and the flow is composed of high-purity methane and air. A chemically-reacting flow model with a global surface-reaction mechanism and GRI-Mech 3.0 gas-phase chemistry is developed and used to assist interpretation of the experimental data. Comparison of experimental data with numerical models that include both surface and gas-phase chemistry suggests that the catalyst surface tends to quench gas-phase combustion by removing methyl radicals. Over a range of conditions, surface temperature (680°C ≤ Ts ≤ 1110°C), and equivalence ratio (0.2 ≤ φ ≤ 0.4), the numerical model is able to achieve good agreement with the measurements. |
| Databáze: | OpenAIRE |
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