Fig. 5 represents the 1H-NMR spectrum of the oil product
from the pyrolysis of corncob. The percentages of the hydrogen types that were calculated on the basis of the chemical devia- tion values obtained from the 1H NMR spectra are in Table 3. Resonances between 6.0 and 9 ppm were assigned to aromatic structures. Aromatic ring-joining methylene protons, so called HF, were observed in the bio-oil and their characteristic peaks are in the range of 3.0 and 4.0 ppm. bCH3, CH2, CHg or further from an aromatic ring protons (centered at 1.25 ppm) were indicated in the bio-oil. Moreover CH3, CH2 and CH protons a to an aromatic ring were present in the highest proportion in the bio-oil. The protons in the a and b positions to an aromatic ring (Ha and Hb) were indicated as the majority in the bio-oils of safflower seed press cake (SPC) [30,54].