Characterization of a bio-oil from pyrolysis of rice husk by detailed compositional analysis and structural investigation of lignin

► In total, 167 organic species were identified in the extracts from the RHO. ► A possible structure of lignin in RH was constructed based on the identification. ► PE is effective for extracting the benzene ring-containing compounds from the RHO. ► As a new type of linkage in lignin, Car-CH2-Car was found in a compound detected. ► The pyrolysis of lignin involved in the cleavage of CC and CO bridged bonds.