Studies on the CO2 Adsorption of Li-Containing Porous Carbon Materials with Supported CuO

In this study, Li-containing porous carbon materials were prepared from terephthalic acid and lithium hydroxide, and then loaded with different contents of copper oxide. After these materials were fully characterized with X-ray diffraction, scanning electron microscope, Raman spectrum, nitrogen adsorption and desorption, and CO2-TPD, their CO2 capture performance was measured. Results showed that the CO2 capture capacity of CuO(0.75)/LiC at 0 degrees C under 1 bar was as high as 142.8 mg-CO2 g-1. However, excess CuO significantly reduced CO2 capture performance of the material. For example, the maximum adsorption capacity of CuO(2)/LiC was only 119.7 mg-CO2 g-1. Meanwhile, with CO2/N2 mixed gas, these materials had significantly and selectively higher CO2 adsorption capacity over N2. Additionally, all of these lithium-containing carbon-based porous materials with supported copper oxide, including CuO(0.75)/LiC, could effectively capture CO2 with high selectivity and reproducibility. In this study, Li-containing porous carbon materials with different CuO contents were successfully prepared by high-temperature thermal dispersion method, and it was found that CuO(0.75)/LiC-based porous carbon materials had strong CO2 capture ability, high selectivity and material renewability, indicating that the material has a good development and application prospect as a carbon dioxide capture and separation material. image