Absorption of CO2 on CaSiO3 at high temperatures

Abstract The reduction of CO 2 emission is essential. In the present work, CaSiO 3 was prepared through a solid chemical reaction of CaCO 3 and SiO 2 at 800 °C and investigated as a CO 2 sorbent via X-ray diffraction (XRD) and thermal gravimetric analysis (TGA) techniques, realizing that CaSiO 3 commenced to absorb CO 2 at 400 °C and ended at 800 °C with about 28.72% CO 2 sorption efficiency while using 15% CO 2 , 85% N 2 as flow gases. CO 2 sorption–desorption cycles were also exhibited well. CaSiO 3 can be regenerated by calcination at 800 °C for sufficient time; furthermore, the cheap CaSiO 3 can also be used to capture CO 2 eternally.