Preparation of activated carbons from heavy-oil fly ashes.
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.
Caramuscio
P
P
Enel Produzione Ricerca, Brindisi, Tuturano, Litoranea Salentina, Località Cerano 72020 (Br), Italy. caramuscio@crr.enel.it
De Stefano
L
L
Seggiani
M
M
Vitolo
S
S
Narducci
P
P
D002244:Carbon / Q000032:analysis / Q000737:chemistry*; D002245:Carbon Dioxide / Q000032:analysis; D017745:Incineration; D010578:Petroleum; D016062:Porosity; D012037:Refuse Disposal; D013696:Temperature
D010578:Petroleum; D002245:Carbon Dioxide; D002244:Carbon