Synthesis of grape-seed derived carbon with high specific surface area for CO2 selective adsorption

Nitrogen-doped porous carbons with BET surface area of 1068.2–3314.5 m2/g and nitrogen contents 3.2–6.5% were prepared solid waste grape-seed as raw material, NaNH2 activator source at low activation temperature. Super The mechanism on hydrothermal carbon precursors was first explored by thermodynamic analysis TG-IR, which provided theoretical support for pore forming materials. Maximum CO2 CH4 adsorption capacity 273 K pressure 101 kPa 5.42 1.76 mmol g−1 respectively, are higher than those majority derived from most wastes reported in literature. IAST selectivities GS-3-450 the largest CO2/CH4 (40v/60v), CO2/N2 (15v/85v), CH4/N2 (50v/50v) found to be 20.3, 71.4, 6.0 under 298 respectively. competitive gases mixture examined through breakthrough experiments, results showed that time longer N2, beneficial separation mixture. Eight cycles adsorption–desorption studies revealed material exhibited excellent recycling stability. Low temperature preparation method, specific total volume, well ability make it have a very great potential capture CH4.