The effects of the above-mentioned parameters on exergy destruction, and CO2 emission of the power plant are determined for circulating fluidized bed power plant co-firing. The aim of this study is to perform thermodynamic analysis on can Circulating Fluidized Bed Power Plant (CFBPP) co-fired with olive pits. The results of this study also show that the total exergy damage of the plant is about 295 MW and the net exergy yield is 31.26%. The majority (252.40 MW) of exergy destruction occurs in the main boiler and accounts for 86.05% of the total exergy breakdown of CFBPP through exergy analysis. The results show that CFBPP has an effective feature of biomass supplement for exergetic performance and CO2 emissions. (C) 2017 Elsevier Ltd. All rights reserved.