LiNaCO₃‐Containing Porous Carbon Composites for CO₂ capture

Abstract In this study, LiNaCO 3 ‐ and (Li‐Na‐K) 2 CO 3 ‐based porous carbon composites were synthesized from terephthalic acid, lithium hydroxide, sodium hydroxide, and potassium hydroxide at different calcination temperatures. These composite materials were characterized with X‐Ray diffraction, scanning electron microscopy, and nitrogen adsorption and desorption. According to their CO 2 capture performance measured, LiNaC‐700 °C had the largest CO 2 adsorption capacity of 66 mg CO 2 g −1 , while the CO 2 capture capacity of other materials doped with three metal ions was only up to 8.57 mg CO 2 g −1 . Additionally, the CO 2 adsorption capacity of each adsorbent was significantly higher than the N 2 adsorption capacity, showing their high CO 2 adsorption selectivity. Lithium‐containing carbonate‐based porous carbon materials (LiNaCO 3 ‐ and (Li‐Na‐K) 2 CO 3 ‐based porous carbon could effectively capture CO 2 with excellent reproducibility.