(557a) Study On the Capture of Carbon Dioxide with Porous Covalent Triazine-Based Frameworks

CO₂ emission leads to the serious global warming effect, which has become a seriously global  environmental, economic and political issue. CO₂ adsorption technique is a feasible and effective one to capture CO₂ from the industrial gas and eliminate the global warming effect, yet choosing a high-performance adsorbent is the key to the process. Recent years, a novel polymer named covalent triazine-based frameworks (CTFs) could be applied in gas storage because of their high porosities and surface areas (Kuhn et al, 2008). In this paper, CTFs were synthesized by the self-condensation of 1,4-dicyanobenzene (DCB). The samples were characterized by elemental analysis, thermogravimetric analysis and N₂ sorption measurements. Additionally, CO₂ adsorption and desorption were carried out by Intelligent Gravimetric Analyser (IGA-003). The results showed that the surface area of the sample (500 °C, 40h, DCB/ZnCl₂=1:5) is 1179m²/g and the adsorbed amount of CO₂ is 163mg/g at 25°C,15bar. It means that the CTFs show great potential as adsorbents for CO₂ capture and storage. By optimizing the synthesis conditions and raw materials, the CTFs materials with higher surface area and absorbed amounts are obtained.

References

 Kuhn, P., Antonietti, M., Thomas, A.(2008). Porous, Covalent Triazine-Based Frameworks Prepared by Ionothermal Synthesis. Angew. Chem. Int. Ed, 47, 3450-3453.