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- W3215768969 endingPage "100089" @default.
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- W3215768969 abstract "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 for selective CO2 uptake. Pyrolysis temperature is varied during nanocasting using the KIT-6 silica hard template to tailor microporosity and nitrogen inclusions. NOMCs exhibit large surface area (600–1000 m2 g-1) and excellent pore ordering. The CO2/adsorbent interaction energy is estimated by the isosteric enthalpy of adsorption (∼33–40 kJ mol-1) and Henry's constants. The role of nitrogen content (∼7–12 at.%) and of each type of N-species on CO2 adsorption is studied by X-ray photoelectron spectroscopy, and CO2/N2 selectivity is attributed, being pyridinic functionalities the most effective ones. NOMCs are tested at different temperatures, gas flow compositions, reversibility, and so on; in all tested conditions, they outperform a homologous bare sucrose-derived carbon. Enhancing micropore volume allows achieving maximum adsorption capacity in pure CO2 (1.47 mmol g−1 at 30 °C/0.9 bar), whereas increasing surface N-content accounts for the highest selectivity in CO2/N2 mixtures (20/80 v/v) at 35 °C/1 bar (maximum CO2 uptake 0.82 mmol g−1). The combination of a suitable C/N precursor and the hard templating synthetic route is effective for obtaining high-performing, sustainable, and reusable selective CO2 sorbents, without any activation steps or N-doping post-treatments." @default.
- W3215768969 created "2021-12-06" @default.
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- W3215768969 date "2022-03-01" @default.
- W3215768969 modified "2023-10-18" @default.
- W3215768969 title "Nanocast nitrogen-containing ordered mesoporous carbons from glucosamine for selective CO2 capture" @default.
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- W3215768969 doi "https://doi.org/10.1016/j.mtsust.2021.100089" @default.
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