Highly microporous carbons derived from jute sticks by a single step carbonization and activation showed high CO2 capacity (2.5 mmol.g−1) along with exceptional CO2 over N2 selectivity (>50) for post combustion CO2 capture application.
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.Zum Volltext