N- and S-Doped Carbons Derived from Polyacrylonitrile for Gases Separation

The CO2 capture using adsorption can reduce the carbon footprint, increasing sustainability of process without production wastes present in commonly used industrial operations. research work analyses effect doping-agents incorporation materials upon and separation gases, specifically for dioxide nitrogen. carbons precursor was polyacrylonitrile (PAN), which enabled nitrogen atoms structure, whereas sulphur doping reached pure after carbonisation step. influence several variables (such as temperature or pressure) characteristics synthesised (mainly corresponding to surface characteristics) on has been evaluated. Adsorption isotherms were determined each gas (CO2 N2) at different temperatures pressures. Different models evaluated fit experimental data. In general, Toth isotherm described better both gases. Important parameters such CO2/N2 selectivity heat IAS theory temperatures, respectively. Non-activated generated from PAN addition showed highest values (up 400) 40 kJ mol−1), mainly low pressures uptakes, Furthermore, thanks their high capacity, these be applied mixtures with