Exploring CO2 Methanation Using 3D‐Printed Carbon Architectures

Abstract To demonstrate for the first time the potential of stereolithography‐printed, architected, bio‐based carbon‐supported Ni catalysts for CO 2 methanation, three honeycomb carbon structures with different textural properties were prepared, impregnated with 15 wt.% of nickel metal particles, and studied to correlate their catalytic performances with their textural properties and surface chemistry. Compared with the non‐activated monolith and the steam‐activated monolith, the CO 2 ‐activated monolith achieved a higher CO 2 conversion of 62 % with a CH 4 selectivity of 73 % at 460 °C. Our comparative study demonstrated that the CO 2 ‐activated carbon support, although having fewer basic sites on the surface, exhibits greater dispersion of the Ni phase, enabling an increase in H 2 chemisorption. These results are of interest for further studies related to the optimization of catalytic performance through the design of the architectural and textural properties of such macrostructures.