CO₂ Adsorption on Pore-Engineered Carbons Derived from Jute Sticks

CO₂ capture is a practical approach to mitigating the impacts of global warming. Adsorption-based carbon capture is a clean and potentially energy-efficient method whose performance greatly depends on adsorbent design. In this study, we explored the use of jute-derived carbon as a high-performance adsorbent for CO₂ capture. The carbons were produced by pyrolyzing powdered jute sticks with NaHCO₃ as an activating agent at 500–700 °C. Impressive adsorption capacities of up to 2.5 mmol ⋅ g⁻¹ and CO₂/N₂ selectivities of up to 54 were achieved by adjusting the pore size distribution and surface functionalization. Based on the isotherm results, the working capacities, regenerabilities, and potentials for CO₂ separation were determined for a practical vacuum swing adsorption process. The adsorbent materials were characterized by XRD, FTIR, Raman, FESEM and N₂ sorption at 77 K. This study provides a general approach for designing adsorbents for various gas-separation applications.