Nanocast nitrogen-containing ordered mesoporous carbons from glucosamine for selective CO2 capture

D-glucosamine is investigated as a non-toxic and sustainable carbon/nitrogen (C/N) source for the templated synthesis of nitrogen-containing CMK-8 ordered mesoporous carbons (NOMCs) conceived selective CO2 uptake. Pyrolysis temperature varied during nanocasting using KIT-6 silica hard template to tailor microporosity nitrogen inclusions. NOMCs exhibit large surface area (600–1000 m2 g-1) excellent pore ordering. The CO2/adsorbent interaction energy estimated by isosteric enthalpy adsorption (∼33–40 kJ mol-1) Henry's constants. role content (∼7–12 at.%) each type N-species on studied X-ray photoelectron spectroscopy, CO2/N2 selectivity attributed, being pyridinic functionalities most effective ones. are tested at different temperatures, gas flow compositions, reversibility, so on; in all conditions, they outperform homologous bare sucrose-derived carbon. Enhancing micropore volume allows achieving maximum capacity pure (1.47 mmol g−1 30 °C/0.9 bar), whereas increasing N-content accounts highest mixtures (20/80 v/v) 35 °C/1 bar (maximum uptake 0.82 g−1). combination suitable C/N precursor templating synthetic route obtaining high-performing, sustainable, reusable sorbents, without any activation steps or N-doping post-treatments.