Abstract
The one-step synthesis of new tailored nanoporous carbons (NCs) from the common polypody (Polypodium vulgare) as feedstock for the first time was presented. The significance of nitrogen flow (2.25 – 30 dm3/h) and temperature (500 – 900 °C) during carbonization was investigated. KOH activated NCs have a high specific surface area (1994 m2/g), large total pore volume (0.998 cm3/g), and micropore volume (0.923 cm3/g). NCs displayed tailored textural properties for CO2 capture. The NCs showed superior CO2 adsorption at 1 bar equal to 5.67 and 9.05 mmol/g, for 298 and 273 K, respectively. The selectivity of CO2 adsorption in relation to N2 was also high. The selectivity coefficient was achieved to 23 and SIAST selectivity 59.5. The isosteric heat of adsorption calculated on the basis of the Clausius-Clapeyron equation and Sips model was ranged from 26 to 31 kJ/mol and suggested the physisorption mechanism of adsorption.
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