The catalytic suppression of the pyrolytic onset temperature of Eucalyptus grandis using three fertilising agents is presented. K2CO3 and K3PO4 successfully decreased the onset temperature with a maximum suppression of -71 Â°C (10.2 % K2CO3) and -49 Â°C (10.5 % K3PO4). Higher loadings may achieve a maximum temperature suppression of Î”T(K2CO3)= – 94 Â°C and Î”T(K3PO4)=-55 Â°C. This implies that substantial energy savings for the synthesis of biochar via pyrolysis are to be expected as a result of this considerable temperature suppression. BET surface area, porosity and ion exchange capacity may have also been enhanced in-situ but is yet to be evaluated.
Keywords Catalytic pyrolysis, biochar, TGA, K2CO3, K3PO4, Ca(NO3 )2 Â· 4H2O