Characterisation, analysis and comparison of multiple biomass fuels used in co-firing trials

The co-firing of biomass and coal is one method proposed for the reduction of CO2 emissions. This paper compares synthetic laboratory ash of hemp, coal and eucalyptus and their co-ashed blends with deposits formed during the co-combustion of hemp and coal and eucalyptus and coal. Results show that whilst the results are not in complete agreement a trend towards the formation of Ca-silicates, Ca-Mg silicates and K-Al-Silicates at high temperatures is present in both laboratory ashed samples. The morphology of the particles formed through the different methods differs with larger spherical agglomerates present in the deposits.