LiNaCO3‐Containing Porous Carbon Composites for CO2 capture

Abstract

AbstractIn this study, LiNaCO3‐ and (Li‐Na‐K)2CO3‐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 CO2 capture performance measured, LiNaC‐700 °C had the largest CO2 adsorption capacity of 66 mg CO2 g−1, while the CO2 capture capacity of other materials doped with three metal ions was only up to 8.57 mg CO2 g−1. Additionally, the CO2 adsorption capacity of each adsorbent was significantly higher than the N2 adsorption capacity, showing their high CO2 adsorption selectivity. Lithium‐containing carbonate‐based porous carbon materials (LiNaCO3‐ and (Li‐Na‐K)2CO3‐based porous carbon could effectively capture CO2 with excellent reproducibility.