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Increasing levels of carbon dioxide (CO 2 ) emissions, which significantly impact climate change, necessitate the development of effective carbon capture materials. This study investigates the potential of sugar beet pulp (SBP), an abundant agricultural waste material, as a raw material for producing activated carbon (AC) for CO 2 adsorption. To our knowledge, this is the first comprehensive study specifically examining AC production from SBP for CO 2 capture applications. Four activation methods-one-step chemical, physical, physicochemical, and two-step physicochemical were employed at carbonization temperatures of 500, 600, and 700 °C. The resulting ACs were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET) surface area analysis, and scanning electron microscopy (SEM). The two-step physicochemical activation process significantly increased the porosity and surface area of AC to 903.49 m 2 /g. Among the tested conditions, AC produced at 700 °C with a 1:1 KOH/biomass ratio exhibited the highest CO 2 adsorption capacity of 7.45 mmol/g. CO 2 adsorption followed pseudo-second order (PSO) kinetics (q e = 128.77 mg/g, k 2 = 0.0045 g/mg.min, R 2 = 0.9738), confirming chemisorption dominance. These findings demonstrate the effectiveness of activation techniques in enhancing the CO2 adsorption performance of AC obtained from SBP, highlighting its potential as an environmentally friendly, sustainable, and cost-effective adsorbent.
Dönmez et al. (Tue,) studied this question.