One word is not enough
The word “charcoal” covers products with different properties. Final use should drive process and controls.
For soil
Biochar may be considered as a soil amendment when it meets criteria suitable for agronomic use and contaminants.
For energy
Carbonized powder can be densified with a binder to make briquettes whose strength, moisture and combustion should be controlled.
For adsorption
Activated carbon targets high adsorption capacity. Performance depends on surface, pores, pollutant and contact conditions.