Influence of pyrolysis temperature on physicochemical properties of biochar obtained from the fast pyrolysis of pitch pine (Pinus rigida)

► Biochar was obtained as byproducts during fast pyrolysis of pitch pine at various temperatures. ► Yield of biochar decreased sharply from 60.7% to 14.4% with pyrolysis temperature. ► Carbons in the biochars were rearranged to highly ordered aromatic form.