2.2.1. Materials

Three hydrochar types were tested, namely, HC\_200\_0 (non-activated, residence time 0 min), HCA\_200\_0 (activated, residence time 0 minute), and HCA\_200\_120 (activated, residence time 120 min). Grain size ranged from 106 μm to 355 μm. Nitrogen (grade 5.5), methane (grade 4.5), and carbon dioxide (grade 4.0) were used for dynamic adsorption tests (Rivoira Spa). Blank tests were performed, packing the column with glass beads (2500 kg/m3, 106–355 μm).
