Highly efficient and selective CO2 capture of Li2CO3- and (Li-K)2CO3-based porous carbon composites

In this study, Li2CO3- and (Li-K)(2)CO3-based porous carbon composites were synthesized from terephthalic acid, lithium hydroxide and sodium hydroxide through calcination at different temperatures. These materials were fully characterized through X-ray diffraction, Raman spectroscopy, and nitrogen adsorption and desorption. Results showed that the excellent CO2 capture capacities of LiC-700 & DEG;C and LiKC-600 & DEG;C were 140 and 82 mg CO2 g(-1) at 0 & DEG;C and 25 & DEG;C, respectively. Additionally, it is calculated that the selectivity of LiC-600 & DEG;C and LiKC-700 & DEG;C with a CO2/N-2 (15 : 85) mixture was about 27.41 and 15.04, respectively. Therefore, Li2CO3- and (Li-K)(2)CO3-based porous carbon materials could be used to effectively capture CO2 with high capacity and high selectivity.