Blending biomass fuels for next-generation Power-BECCS plants

• Development of a reaction kinetics model for biomass combustion. • Base case analysis showing the impact of CCS for next-generation Power-BECCS. • Case study analysis of blending up to 30% alternate biomass feedstocks with wood chips. • Blending alternate fuels can generate more power with enhanced CDR potential. • Beneficial for utilising waste materials and strengthening security of feedstock supply. To meet future resource requirements for the uptake of bioenergy with carbon capture and storage (BECCS) technologies to meet Net Zero targets, a range of biomass feedstocks are required to ensure the security of supply, utilise waste materials, and promote the circular economy. This study investigates the potential for blending forestry/agricultural residues and waste wood products with woody biomasses in combustion-based Power-BECCS, using a process model developed in Aspen Plus and validated against literature data. The base case assessment highlights the key performance indicators (KPIs) and energy penalty associated with CCS for next-generation BECCS plants. The results of a comparative study show the impact of blending various biomass species on plant KPIs. This research provides the basis for decision making on feedstock selection and optionality. Several alternate fuels produce similar KPIs to the base case, in some cases generating more net power (Fuels B, D, E, F, H, and I) or capturing more CO 2 (Fuels C and G). Overall, blending biomass fuels is a promising option to utilise alternate feedstocks, improve plant performance, and enhance the Carbon Dioxide Removal (CDR) potential.