Activation de la tourbe de sphaigne par le dioxyde de carbone et agglomération du charbon actif produit

The physical activation of peat moss using CO 2 has been investigated with respect to the operational variables and the characteristics of the active carbon produced. Peat coke is produced during carbonisation with a 30% yield. The activated carbon accounts for 25% of the initial air dried peat moss. Analysis of the active carbon has revealed a surface area up to 600 m 2 /g and a chemical reactivity similar to commercial active carbon as measured by the iodine, phenazone and phenol indexes. The active carbon thus produced is a powdered material, with a weak abrasive resistance. Agglomeration of the carbon and subsequent pelletization has been done with ammonium ligno‐sulfonate, water, and the application of pressure. Resistant pellets can be obtained using 15–20% lignosulfonate and 3000 psi.