Ammonia Combustion
Effects of the equivalence ratio, the hydrogen initial content and the pressure on the structure of ammonia flames
C. Duynslaegher1, H. Jeanmart2 and J. Vandooren1
1Laboratoire 2Unité
catherineduynslaegher@uclouvain.be de Physico-Chimie de la Combustion, Place Louis Pasteur n° 1 de Thermodynamique et Turbomachines, Place du Levant n° 2 Université Catholique de Louvain - 1348 Louvain-la-Neuve - Belgium
Aim of this Study
In the race for alternative fuels, the hydrogen solution is highly advocated : highly Its combustion produces only water and there are no formation of carbon dioxide, carbon monoxide or soot. However several drawbacks have to be taken into consideration in using hydrogen: - There are no natural sources of hydrogen. - The storage and the transport of such a fuel need expensive and not obvious techniques. We suggest to use ammonia in spark ignition engines. The use of ammonia is an advantage for pollution because its combustion produces only nitrogen, water and a few quantity of nitrogen monoxide. The nitrogen monoxide formation and degradation mechanism is well known but kinetics of key reactions require to be validated against experimental data. This work consists thus in the structure investigation of several ammonia flames burning in different conditions of pressure (P), equivalence ratio (Φ) and initial hydrogen percentage(%H2). The aim of this work is to find the optimal conditions to produce as less of nitrogen monoxide as possible when ammonia is used as a fuel in spark ignition engines.
Effect of the equivalence ratio • The NH3 profile of the stoichiometric flame lies between those of rich and lean ones, the latter has a larger adiabatic burning velocity. • The equivalence ratio has an important impact on the NO yield. This is thus an important factor to take into account in practical devices. • The N2O maximum is higher in the lean flame than in the two others. • H2 profiles are similar for the three flames but the burned gases
C. Duynslaegher1, H. Jeanmart2 and J. Vandooren1
1Laboratoire 2Unité
catherineduynslaegher@uclouvain.be de Physico-Chimie de la Combustion, Place Louis Pasteur n° 1 de Thermodynamique et Turbomachines, Place du Levant n° 2 Université Catholique de Louvain - 1348 Louvain-la-Neuve - Belgium
Aim of this Study
In the race for alternative fuels, the hydrogen solution is highly advocated : highly Its combustion produces only water and there are no formation of carbon dioxide, carbon monoxide or soot. However several drawbacks have to be taken into consideration in using hydrogen: - There are no natural sources of hydrogen. - The storage and the transport of such a fuel need expensive and not obvious techniques. We suggest to use ammonia in spark ignition engines. The use of ammonia is an advantage for pollution because its combustion produces only nitrogen, water and a few quantity of nitrogen monoxide. The nitrogen monoxide formation and degradation mechanism is well known but kinetics of key reactions require to be validated against experimental data. This work consists thus in the structure investigation of several ammonia flames burning in different conditions of pressure (P), equivalence ratio (Φ) and initial hydrogen percentage(%H2). The aim of this work is to find the optimal conditions to produce as less of nitrogen monoxide as possible when ammonia is used as a fuel in spark ignition engines.
Effect of the equivalence ratio • The NH3 profile of the stoichiometric flame lies between those of rich and lean ones, the latter has a larger adiabatic burning velocity. • The equivalence ratio has an important impact on the NO yield. This is thus an important factor to take into account in practical devices. • The N2O maximum is higher in the lean flame than in the two others. • H2 profiles are similar for the three flames but the burned gases