Research Article
Spectroscopic Analysis of Heterogeneous Biocatalysts for Biodiesel Production from Expired Sunflower Cooking Oil
Table 4
FTIR wave numbers for different peaks of regular diesel.
| | Wave number diesel (cm−1) | Group attributed | Vibration type | Absorption intensity |
| | 2954 | C–H | Stretch | Strong | | 2922 | C–H | Stretch | Strong | | 2853 | C–H | Stretch | Medium | | 1770 | C=O | Stretch | Medium | | 1758 | C=O | Stretch | Strong | | 1456 | C=C | Stretch | Medium | | 1376 | C=C | Stretch | Medium | | 1246 | C–O | Stretch | Strong | | 1057 | C–O | Stretch | Medium | | 722 | C–H | Out-of-plane bend | Medium |
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