RETRACTED: Techno-economic assessment of coal and torrefied biomass co-combustion: A case study of oxy-combustion carbon capture power plants in Turkey

Abstract

Carbon capture and storage is one of the most important technologies to reduce CO 2 emissions. Oxy-combustion can be considered as the most energy combustion and cost-efficient CCS technology. In this study, a detailed techno-economic assessment of Turkish domestic coal, biomass and torrefied biomass (biocoal) as a fuel is conducted on 2 × 160 MW CFB units of ÇAN Power plant in Turkey. ASPEN HYSYS was used in this study to simulate oxygen enriched combustion and Oxy-Combustion atmosphere. The economic performance was characterized in terms of Levelised cost of electricity , Cost of CO 2 capture and Cost of CO 2 was avoided. The results showed that oxygen-enriched combustion from the point of view of carbon capture and storage application seems more economical than air combustion . It was found that cost of electricity, cost of CO 2 avoidance and cost of CO 2 capture are 50.5 €/MWh, 55.3 €/tCO 2 and 36.4 €/tCO 2 respectively. When coal is used in oxygen enriched atmosphere the costs are slightly lower than the air combustion. The results obtained in the techno-economic analysis showed that costs of biomass and biocoal oxygen enriched co-combustion case are very close to oxy combustion case. The difference in capture cost is 16% and in avoidance cost is 10%. Because of the difficulty of the Oxy-combustion retrofitting, 30% oxygen enriched co-combustion can be the short term economic retrofitting option for existing power plants. • Aspen Hysys was used in this study to simulate Oxygen-enriched combustion and Oxy-combustion atmosphere. • Techno-economic assessment of fueles was successfully conducted on 2 × 160 MW CFB units of power plant for all cases. • The economic performance was characterized in terms of Levelised cost of electricity, Cost of CO 2 capture and Cost of CO 2 avoided. • Oxygen-enriched combustion from the point of view of CCS application seems more economical than air combustion.