Effects of Burned Gas Recirculation on NOx Emissions from Natural Gas–Hydrogen–Oxygen Flames in a Burner with Separated Jets
| Autor: | Toufik Boushaki, Jean-Charles Sautet, Sébastien Yon |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Energy & Fuels. 26:4703-4711 |
| ISSN: | 1520-5029 0887-0624 |
| Popis: | Strict regulations of NOx emission standards have resulted in an optimized performance of combustion chambers. The present paper describes the effects of burned gas recirculation on NOx emissions from hythane–oxygen flames in a separated jet burner. Burners with separated fuel and oxidizer jets permit a high dilution of reactants and a large recirculation zone of burned gases in the combustion chamber, which favors the decrease of nitrogen oxide emissions. In this study, the oxy-fuel burner was equipped with two nozzles: the first nozzle supplied a hythane flow (a mixture of natural gas and hydrogen), and the second nozzle supplied pure oxygen. The hydrogen content in the fuel varied from 0 to 20% in volume. The influence of the distance between the nozzles (12–100 mm) and the global equivalence ratio of the mixture was analyzed. Measurements of combustion product concentrations were carried out at the combustion chamber exit using a water-cooled probe and a NOx analyzer. The velocity fields and the size ... |
| Databáze: | OpenAIRE |
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