The stability limits of the catalytically stabilized thermal combustion of methane and ethane
The lean stability limits for the catalytically stabilized thermal combustion of various mixtures of methane/ethane over supported platinum catalyst were determined. The reference inlet velocity of the flow over the catalyst was maintained at 97 cm/s, and the catalytic bed was well-insulated to achieve adiabatic conditions. When ambient air is used as the oxidizer, the results show that the minimum operating temperatures required for stable combustion were 1680 and 1510 K for pure methane and pure ethane, respectively. It was found that the minimum stable operating temperature for methane combustion could be reduced by nearly 80 K by adding ethane as approximately 20% of the total fuel flow. Comparisons with heterogeneous/homogeneous ignition characteristics of methane/ethane mixtures over a flat catalytic plate, also determined in this study, demonstrate that ethane extends the methane stability limits by decreasing the ignition delay time of the homogeneous gas-phase reactions.
- Research Organization:
- Dept. of Chemical Engineering, Yale Univ., New Haven, CT (US)
- OSTI ID:
- 6219160
- Journal Information:
- Ind. Eng. Chem. Res.; (United States), Journal Name: Ind. Eng. Chem. Res.; (United States) Vol. 27:8; ISSN IECRE
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKANES
CATALYSTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION KINETICS
DISPERSIONS
ELEMENTS
ETHANE
HYDROCARBONS
KINETICS
METALS
METHANE
MIXTURES
ORGANIC COMPOUNDS
OXIDATION
PHASE STUDIES
PLATINUM
PLATINUM METALS
REACTION KINETICS
STABILITY
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS