Combustion with mixed enrichment of oxygen and hydrogen in lean regime
| Autor: | H. Bounaouara, Ibtissem Hraiech, J.C. Sautet, Mohamed Ali Mergheni, Zouhaier Riahi, Sassi Ben Nasrallah |
|---|---|
| Přispěvatelé: | Complexe de recherche interprofessionnel en aérothermochimie (CORIA), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Laboratory of Wind Energy Master and Waste Energy Recovery, Laboratoire d'Etudes des Systèmes Thermiques et Energétiques [Monastir] (LESTE / ENIM), École Nationale d’Ingénieurs de Monastir (ENIM) |
| Rok vydání: | 2017 |
| Předmět: |
Chemiluminescence
Hydrogen 020209 energy Flame structure Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Combustion 7. Clean energy Methane chemistry.chemical_compound 0202 electrical engineering electronic engineering information engineering [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] NOx Flammability limit Oxygen enrichment Renewable Energy Sustainability and the Environment Hydrogen enrichment Global richness 021001 nanoscience & nanotechnology Condensed Matter Physics Particle image velocimetry Gas analyzer Fuel Technology chemistry 13. Climate action Combustor 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy International Journal of Hydrogen Energy, Elsevier, 2017, 42 (13), pp.8870-8880. ⟨10.1016/j.ijhydene.2016.06.232⟩ |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2016.06.232 |
| Popis: | WOS:000401385300030; International audience; A low global richness of combustion is interesting from an ecological and economic point of view as it helps to limit fuel consumption. In fact, the consequences of the combustion in poor mode are the appearance of local or global flame extinctions, energy loss by radiation and change in flame structure. The flammability limits of the diffusion methane flame can be resolved by the enrichment of the combustion air with oxygen or the use of the pure oxygen as oxidant as well as the addition to hydrogen in natural gas. Moreover, the use of oxygen and hydrogen as previously mentioned allow working in low ranges of richness while maintaining good flame stability. For a constant burner power of 15 kW, the reduction of the richness involves an increase in the oxidizer flow rate injected into the combustion reaction. In this present study, the variation of the richness, the fuel enrichment with hydrogen and the oxidant enrichment with oxygen are shown as major parameters where they have direct influences on the flow dynamic, the flame structure and the pollutant emissions. The Chemiluminescence of OH* radical and the PIV (Particle image velocimetry) are used in this work to characterize the flame structure, the stability and the dynamics of the flame. The measurement of pollutant emissions effected by a gas analyzer. The enrichment in oxygen and hydrogen provides a stable flame, which is well attached to the burner for the following richness values: 0.7, 0.8, 0.9 and 1. The reduction of the richness promotes the mixture quality of the reactants and leads a reduction in CO2 and CO concentration. By contrast, the decrease of the richness supports the formation of NOx. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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