Spherical Activated Carbons with High Mechanical Strength Directly Prepared from Selected Spherical Seeds.

In the present manuscript, the preparation of spherical activated carbons (SACs) with suitable adsorption properties and high mechanical strength is reported, taking advantage of the retention of the spherical shape by the raw precursors. An easy procedure (carbonization followed by CO₂ activation) has been applied over a selection of three natural seeds, with a well-defined spherical shape and thermal stability: (RA), (OL), and (CI). After the carbonization-activation procedures, RA and CI, maintained their original spherical shapes and integrity, although a reduction in diameter around 48% and 25%, respectively, was observed.