Microporous Carbons Obtained via Solvent-Free Mechanochemical Processing, Carbonization and Activation with Potassium Citrate and Zinc Chloride for CO2 Adsorption

In this study, the facile and sustainable synthesis of highly microporous carbons is explored to reduce extensive use harsh activating agents solvents. The role potassium citrate (PC) as a greener agent in addition conventional ZnCl2 investigated mechanochemical solvent-free preparation carbon materials from chestnut tannin (CT), biomass-type precursor. A small amount chemical activator coupled with CO2 activation at 700 °C afforded higher specific surface area (1256 m2 g−1) larger micropore volume (0.54 cm3 compared activated both PC ZnCl2. high microporosity PC-activated materials, significantly enlarged after 0.16 0.54 g−1, makes them favorable for adsorption, evidenced by adsorption capacity 3.55 mmol g−1 ambient conditions (25 °C, 1 bar). This study shows that processing presence promising method obtaining materials.