The use of solid acceptors for CO2 sequestration has been widely used in many new applications. Recent developments in the field are based in the use of synthetic CO2 acceptors for high‐temperature applications (400–700°C), which include compounds such as lithium zirconate (Li2ZrO3) and lithium orthosilicate (Li4SiO4). Sodium‐based oxides have been used in the past either as low‐temperature (<250°C) CO2 acceptors or as promoters for lithium‐based acceptors. In this study we report the use of Na‐based acceptors at high temperatures as an alternative for lithium based CO2 acceptors with the use of thermogravimetric (TGA), and X‐ray diffraction (XRD) analysis. Na‐based acceptors were prepared by the solid‐state method, and the sorption/desorption property was examined by TGA. In the first part of the study sodium acceptors prepared included: Sodium titanate (Na2TiO3), sodium antimoniate (Na3SbO4), and sodium zirconate (Na2ZrO3). TGA experiments at 600°C showed Na2ZrO3 to have the highest activity to...