Among all the discoveries made by man, probably one of the most significant is that of fire. The fire has allowed our ancestors to cook food, to extend their activities until late, to protect themselves from predators and to warm up in the freezing winter nights.
Today, as then, the combustion processes are essential. It is thanks to these processes that we see a cheery fire in the fireplace, we can move in the car and we can produce electricity in large power plants.
In the branch of production of electricity, a lot have done (and still do) fossil fuels. Alongside the fossil fuels are increasing the importance the renewable sources, always used and now more important to meet global energy needs reducing environmental impact of pollution.
In particular, are emerging increasingly efficient technologies for the treatment of biomass. When it comes to combustion or gasification of biomass (or other solid fuels), the efficiency is crucial. Indeed the reactions which take place are extremely complex, and can provide as output a series of chemical species that do not represent the typical products of partial or total combustion (CO, H2, CO2, H2O). A careful control of the operating parameters allows to considerably increase the efficiency of the system, in terms of energy performance and in terms of production of polluting species.
What are these “operating parameters”? An important parameter, which has important implications in the formation of pollutants, is the fuel / air ratio.