Influence of temperature for Li4SiO4 based CO2 capture

https://doi.org/10.3390/ijms20040928

“TGA curves of CO₂ absorption by Li₄SiO₄ at various temperatures are present in Figure 6, and weight gain of Li₄SiO₄ was used to evaluate its CO₂ absorption performance, which can be calculated according to Equation (4):

where W_N is the weight gain of Li₄SiO₄ material during the Nth cycles, wt.%; and C_N is the amount of CO₂ absorbed by Li₄SiO₄ material during the Nth cycles, mg/g. CO₂ absorption capacity of Li₄SiO₄ increases with the temperature rising from 460 to 560 °C. Li₄SiO₄ shows a fast CO₂ absorption stage in a short time and a slow CO₂ absorption stage in the following long time, which are controlled by the chemical reaction and diffusion, respectively [28].”

“Figure 6. Isotherms obtained in a CO₂ atmosphere at various temperatures [28].”