Exploring the chemical activation effects of CsHCO3 in preparing N-doped carbonaceous CO2 adsorbents.

[Display omitted] • CsHCO 3 is used as effective chemical activator to synthesize porous carbons. • The carbons exhibit S BET of 1251–2746 m2/g. • An impressively high CO 2 uptake of 4.64 mmol/g is achieved at 25 °C and 1 bar. • At 25 °C and 20 bar, CO 2 uptake of the carbons reaches 22.12 mmol/g. In the current work, highly porous carbons were prepared from CsHCO 3 activation of glucosamine hydrochloride derived hydrochar. Carbon materials with surface area of 1251–2746 m2/g were obtained at high yield of 42.5–49.9%. The carbons demonstrated remarkable CO 2 adsorption capabilities at both 1 and 20 bar. At 25 °C, an impressively high CO 2 uptake of 4.64 mmol/g was achieved, and it increased to 22.12 mmol/g at 20 bar. The current work shows that CsHCO 3 can be used as a highly effective activator in preparing porous carbons for CO 2 adsorption. [ABSTRACT FROM AUTHOR]