Combustion of methane and ethane with CO2 replacing N2 as a diluent. Modelling of combined effects of detailed chemical kinetics and thermal properties on the early stages of combustion
| Autor: | S. J. Ashcroft, Michael R. Belmont, I. Thorpe, D. Yossefi, J. Hacohen |
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| Rok vydání: | 1995 |
| Předmět: |
Work (thermodynamics)
General Chemical Engineering Organic Chemistry Inorganic chemistry Energy Engineering and Power Technology Thermodynamics chemistry.chemical_element Combustion Diluent Nitrogen Methane Chemical kinetics chemistry.chemical_compound Fuel Technology chemistry Thermal Carbon dioxide |
| Zdroj: | Fuel. 74:1061-1071 |
| ISSN: | 0016-2361 |
| DOI: | 10.1016/0016-2361(95)00048-a |
| Popis: | Simulations of methane combustion are developed for a synthetic atmosphere system where nitrogen is replaced as diluent with carbon dioxide. Special attention is given to the role of the detailed chemistry, using a scheme containing ∼100 separate reactions. The sensitivity of the results to the major reactions is analysed, and the approach to equilibrium is considered. Examination of a set of model problems shows that where there is a large initial concentration of carbon dioxide, the chemical effects are very important. The results for constant-pressure combustion coincide with conventional expectations, whereas those for a constant-volume system initiated by isotropic auto-ignition are very much counter to intuition. The methods are validated by simulating a plug-flow reactor, for which agreement with experiment is good. The typical application of this work is to subsea vehicles and other closed-environment machines, and the recognition of the importance of chemical effects points to the possibility of chemically modifying performance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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