In this study, a Portland-cement-based CO2 foam concrete (PC-CFC) with good thermal insulation performance and carbon fixation ability is prepared using carbonation pretreatment cement and a physical foaming method.  The effects of CO2 on the compressive strength, thermal insulation, and carbon fixation properties of PC-CFC are studied.  The internal relationship between the compressive strength, thermal insulation, and carbon fixation performance of PC-CFC is analyzed, and the feasibility of PC-CFC as a filling material to realize the in situ mineralization and storage of CO2 in the coal-electricity integration base is discussed.  Using CO2 as a foaming gas and the physical foaming method to prepare CFC can achieve improved thermal insulation performance.  The thermal conductivity of PC-CFC is 0.0512-0.0905 W/(m·K).  In addition, the compressive strength of PC-CFC increases by 19.08% when the thermal conductivity of PC-CFC increases by 1%.  On the premise of meeting the thermal insulation requirements, PC-CFC can achieve improved compressive strength. 
THERM