Bands range (cm-1) Functional group Compounds 3600-3200 O-H stretching EG, EG oligomers, EG derivatives, alcohols, water 3000-2800 C-H stretching Alkanes 1730-1650 C=O stretching Carboxylic acids, ketones , aldehydes 1465-1350 C-H bending Alkanes 1300-950 C-O stretching O-H bending Alcohols, EG derivatives Phenols, Esters, Ethers 900-750 Aromatic out-of-plane C-H deformation Aromatics

Table 4: Main signals in the FT-IR spectrum of the oily fraction obtained by solvolytic liquefaction using EG and catalytical amounts of Fe2O3/FeOOH nanoparticles.