Abstract In the current study, microporous activated carbons (ACs) were synthesized from gum Arabic tree seed shells (GT) using a hydrothermal method, followed by activation of KOH (KOH to Biomass is 1:3) and carbonization at various temperatures. The resulting ACs were evaluated for their CO 2 adsorption capacity. Among all the prepared ACs, GTC‐750 exhibited a high CO 2 uptake of 3.49 mmol/g at ambient conditions. This superior CO 2 adsorption performance was primarily attributed to its high microporous surface area (1195 m 2 /g), substantial micropore volume (0.79 cm 3 /g), narrow pore size (0.75 nm), and the existence of more abundant basic oxygen functional groups. The textural properties of the ACs were characterized by using various kinds of characterization techniques, such as N 2 adsorption–desorption, X‐ray diffraction, Fourier‐Transform Infrared Spectroscopy, X‐ray photoelectron spectroscopy, Field Emission Scanning Electron Microscopy, Raman, and CHNS elemental analysis. Furthermore, the dynamic CO 2 adsorption behavior was evaluated using the Yoon‐Nelson model, Bohr‐Adams, and Thomas models. In addition to its high CO 2 uptake, GTC‐750 demonstrated excellent recyclability during adsorption–desorption up to ten consecutive cycles.
Shankaraiah et al. (2025) studied this question.