PMF and PKS produced more phenolic compounds in the bio-oil, possibly due to their higher lignincontents compared to that of EFB. Hence, when the ether bonds inthe lignin structure were hydrolyzed at 390◦C, a variety of phenolderivatives and methoxy phenols were produced Aromatic compounds were formed from the decomposition of lignin [15]whereas other compounds found in the bio-oil arose from thehydrolysis of hemicellulose, cellulose and lignin [