Poly(s-triazine) based porous carbon for CO2 sequestration

Nitrogen containing microporous materials are promising candidates for the efficient and selective CO2 capture. Triazine containing polyaminals are the potential precursors for the preparation of porous carbons. The various nitrogen moieties present in the materials are examined by XPS analysis. The FE-SEM and HR-TEM images of the materials and N-2 sorption profile exhibit abundant microporous structure. Pore size distribution reveals the existence of narrow micropores in the materials. The prepared materials exhibit surface area up to 684 m(2)/g, microporous surface area up to 441 m(2)/g and CO2 capture up to 154 mg/g. CO2 isotherm data is well fitted with Langmuir and Freundlich isotherm models. Spontaneity of the CO2 adsorption process are demonstrated by thermodynamic parameters. The high CO2/N-2 selectivity and considerable CO2/CH4 selectivity of the materials are calculated by initial slope method (Henry's law).