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Preparation of activated carbons from heavy-oil fly ashes
P Caramuscio1, L De Stefano, M Seggiani
1Enel Produzione Ricerca, Brindisi, Tuturano, Litoranea Salentina, Località Cerano 72020 (Br), Italy. caramuscio@crr.enel.it
Waste Management (New York, N.Y.)
|June 5, 2003
Abstract:
The use of heavy oil fly ash with high ash content (45 wt.%) as a precursor for the preparation of activated carbons has been investigated. The raw fly ash and the fly ash with lower ash content, obtained by a HCl/HF washing treatment, have been pyrolyzed at 900 degrees C and then activated with CO(2) in the temperature range of 800-900 degrees C for different times. The activated carbons have been characterised as regards the surface area and the pore volume. The evolution of the porosity has been related to the burn-off degree.