https://doi.org/10.1016/j.ccst.2022.100059 “Compared to nitrogen-containing functional groups, sulfur-containing functional groups have yet to be investigated in relation to CO2 adsorption (Saha and Kienbaum, 2019). Some researchers suggest that the
https://doi.org/10.1016/j.ccst.2022.100059 “Pyrones, chromenes and ketones of the oxygen-containing functional groups are basic groups that contribute to the alkalinity of the surface. However, most oxygen-containing functional groups are
https://doi.org/10.1016/j.ccst.2022.100059 “Biomass is composed of carbon, hydrogen, oxygen, sulfur, nitrogen, and small amounts of other elements, including alkali metals, alkaline earth metals, and heavy metals,
https://doi.org/10.1016/j.ccst.2022.100059 ” When biomass is pyrolyzed, dehydration and the release of volatile constituents from the carbon matrix form biochar pores and rudimentary pores (Bagreev et al., 2001).
https://doi.org/10.1016/j.ccst.2022.100059 “Compared to above solid adsorbents, biochar is a kind of material which is insoluble, stable, highly aromatized and carbon-rich (Y. Lee et al., 2020). The International Biochar
https://doi.org/10.1016/j.ccst.2021.100018 “Nitrogen atoms can replace carbon atoms in carbon materials as nitrogen atoms are close to C atoms in the periodic table. The covalent radius of carbon is
https://doi.org/10.1016/j.ccst.2021.100018 “Biochar from coffee grounds was reported to be treated by three methods as follows: (i) KSHC, dispersion of the biochar in an alcohol solution
https://doi.org/10.1016/j.ccst.2021.100018 “In-situ pyrolysis of N-containing functional groups and biomass are the most promising way to prepare N-rich biochar. It is required to mix the N-containing
https://doi.org/10.1016/j.ccst.2021.100018 “Compared to the N-containing functionalities, biomass derivatives as precursors are more sustainable and available (Zhao et al., 2010). Some biomass samples that have a high content
https://doi.org/10.1016/j.ccst.2021.100018 “Usually, ammonia, amine groups (including primary amine, secondary amine and tertiary amine), and polymer-based amine are used to introduce N into biochar. Amine groups strongly and
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