The Effect of Hydrogen Concentration on the Flame Stability and Laminar Burning Velocity of Hydrogen-Hydrocarbon-Carbon Dioxide Mixtures

Syngas as a renewable energy source can be produced from Biomass gasification. Generally, syngas consists of H2, CO2, CO and C1-C4 hydrocarbons. The gaseous mixtures are also produced from many other chemical processes, such as coal gasification and methane reforming, as products or by-products. Also there is increasing interesting in the utilisation of Hydrogen-Hydrocarbon gaseous fuels as alternative energy sources instead of conventional fossil fuels. The gaseous mixtures can be used in burners and gas turbines involved in combustion processes. The utilisation of such gaseous mixture is able to reduce CO2 emission and fossil fuels consumption in combustion processes. However, the fluctuation in H2 concentration causes difficulties to predict the laminar burring velocity and flame stability characteristics of the mixtures. These issues lead to the challenges on combustion performance and safe handling. The objectives of this study are to experimentally determine the effect of H2 and CO2 addition on the flame lift-off and blow-out characteristics, and also numerically modelling the laminar burning velocity of the Hydrogen-Hydrocarbon gaseous mixtures to determine the effect of H2 concentration on the laminar burning velocity of the mixtures.