Absorption of CO2 on CaSiO3 at high temperatures

The reduction of CO2 emission is essential. In the present work, CaSiO3 was prepared through a solid chemical reaction of CaCO3 and SiO2 at 800 °C and investigated as a CO2 sorbent via X-ray diffraction (XRD) and thermal gravimetric analysis (TGA) techniques, realizing that CaSiO3 commenced to absorb CO2 at 400 °C and ended at 800 °C with about 28.72% CO2 sorption efficiency while using 15% CO2, 85% N2 as flow gases. CO2 sorption–desorption cycles were also exhibited well. CaSiO3 can be regenerated by calcination at 800 °C for sufficient time; furthermore, the cheap CaSiO3 can also be used to capture CO2 eternally.