Experimental investigation of the combustion properties of CO2 diluted CO-O2 mixtures with variation of initial temperature and pressure

With the increasing relevance of energy transition, synthetic fuels have arisen as an alternative to storage green energy. In the processing of this fuels, carbon monoxide is widely used. Understanding the behaviour of the combustion of this gas is of high importance. To date, very limited knowledge is available on how combustion of carbon monoxide behaves alone or diluted with carbon dioxide as much focus were given towards mixtures that included hydrogen and water. The focus of this work is to investigate the combustion of carbon monoxide in dry ambient and characterize the flame speed of the combustion through two different methods, the Shadowgraph Method and the Constant Volume Bomb Method. For this purpose, combustion experiments in an explosion bomb were conducted. An experimental matrix of nine different initial pressures-temperature combinations and five different mixtures of CO-O2-CO2 were tested.