Catalytic performance of PPM-SO3H and PSS waste fatty acids 5 g, methanol 5 g, reaction temperature 80 °C, reaction time 8 h.
| Trial number | Catalyst | Esterification rate (%) |
|---|---|---|
| 1 | PPM-SO3H (1 g) | 96.9% |
| 2 | PSS (1 g) | 29.0% |
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