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Combustion, Explosion and Shock Waves

2017 year, number 5

Combustion Chemistry of Ternary Fuel Mixtures of Hydrogen and C1-C4 Hydrocarbons at Atmospheric Pressure

D. A. Knyazkov1,2, V. M. Shvartsberg1, A. M. Dmitriev1,3, K. N. Osipova1,3, A. G. Shmakov1,3, O. P. Korobeinichev1, A. Burluka4
1Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2Far Eastern Federal University, Vladivostok, 690950 Russia
3Novosibirsk State University, Novosibirsk, 630090 Russia
4Northumbrian University, NE1 8ST, Newcastle upon Tyne, UK
Keywords: природный газ, многотопливные пламена, структура пламени, молекулярно-пучковая масс-спектрометрия, моделирование, natural gas, multi-fuel flames, flame structure, molecular beam mass spectrometry, simulation


Interest in the combustion chemistry of multi-fuel mixtures is related to the need to study the combustion of natural gas, which is known to be a mixture of alkanes. It has been found by molecular beam mass spectrometry studies and numerical simulation that the width of the zones of consumption of hydrogen and methane in the H2/CH4/C3H8/O2/Ar flame and the width of the zones of consumption of methane and propane in the CH4/C3H8/C4H10/O2/Ar flame differ significantly from each other. The causes of this phenomenon were determined by analyzing the simulation results. It has been found that in the presence of heavier compounds, lighter fuels, such as H2 and CH4, are formed which reduces the rate of their consumption and, hence expands the zone of their consumption in the flame. The influence of the presence of hydrogen in the fuel mixture on the concentration of C2 hydrocarbons has also been studied. It has been established that the addition of hydrogen reduces the maximum concentration of ethane, ethylene, and acetylene in the flame, while the fraction of unsaturated C2 hydrocarbons with respect to saturated ones also decreases.