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| TAN (mg KOH g–1) |
|||
|---|---|---|---|
| crude oil sample | measured | predicted | % reduction in TAN values relative to the predicted untreated sample |
| untreated | 3.8 | 3.6 | |
| heat-treated (200 °C) | 1.36 | 62% | |
| heat-treated (350 °C) | 3.76 | –5% | |
| catalytic treatment | 0.54 | 85% | |
