Cyclic CO 2 absorption/desorption property of Li 3 NaSiO 4 under the partial pressure of CO 2 for practical applications.

The temperature for realizing the cyclic CO2 absorption/desorption property of Li3 NaSiO4 by repetition of switching a CO2 /N2 gas mixture and N2 with a partial pressure of CO2 , P (CO2 ), of 0.1 bar was optimized using the pseudo van't Hoff plot of LiNaCO3 + Li2 SiO3 ↔ Li3 NaSiO4 + CO2 prepared by thermogravimetry at various P (CO2 ) values.