Research Article
Hydrothermal Pretreatment of Date Palm (Phoenix dactylifera L.) Leaflets and Rachis to Enhance Enzymatic Digestibility and Bioethanol Potential
Table 1
FTIR absorbance bands in biomass study (adapted from [
41,
54–
56]).
| Wavenumber (cm−1) | | Polymer |
| 900 | Glycosidic bond | Cellulose (amorphous) [54] | 1035 | C-O, C=C, and C-C-O stretching | Cellulose, hemicellulose, and lignin [55] | 1045 | C-C, C-OH, C-H ring, and side group vibrations | Lignin [56] | 1098 | Glycosidic bond | Cellulose (crystalline) [54] | 1160 | C-O-C asymmetrical stretching | Cellulose, hemicellulose [55] | 1247 | C-O stretching | Hemicellulose, lignin [41] | 1465 | C-H deformation | Lignin [54] | 1510 | Aromatic ring vibration | Lignin [54] | 1595 | Aromatic ring vibration + C=O stretching | Lignin [54] | 2840, 2937 | C-H stretching | Lignin [54] | 3421 | O-H stretching | Lignin [54] |
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