Henrique, AdrianoZafanelli, Lucas F.A.S.Aly, EzzeldinRodrigues, AlírioSilva, José A.C.2025-01-202025-01-202023Henrique, Adriano; Zafanelli, Lucas F.A.S.; Aly, Ezzeldin; Rodrigues, Alírio E.; Silva, José A.C. (2023). CO2 capture in 3D-printed carbon monolith by adsorption. In 6th International Conference Wastes: Solutions, Treatments, and Opportunities. Coimbrahttp://hdl.handle.net/10198/31031Hierarchically structured 3D-printed porous carbon monoliths were evaluated for their applicability in CO2 capture from post-combustion streams. Two materials of the same macroscopic shape were studied, which varied in the micro- and mesoporosity by changing the final CO2 activation time: activated at 1133 K for 6 h (M1) and 12 h (M2), respectively. Fixed bed breakthrough experiments with single (CO2 and N2) and multicomponent (CO2/N2: 15/85 v.%) feed mixtures were conducted, covering the temperature range of 313 - 373 K. Results demonstrated that both materials enable a thermodynamic-based separation of these components due to their strong interaction with CO2. While a higher burn-off during monolith activation enhances its adsorption capacity by increasing the surface area, the highest selectivities were obtained in M1, 18, against 10 in M2. The dual-site and standard Langmuir isotherm models conveniently fitted the adsorption equilibrium data, and a dynamic adsorption model suitably predicted the breakthrough curves.eng3D printed monolithsPost-combustion CO2 captureFixed bed adsorptionModellingconference object