### Summary of Catalysts for Transesterification and Biodiesel Production
#### 1. Homogeneous Catalysts
Homogeneous catalysts for transesterification are classified into base and acid catalysts:
- **Base Catalysts**:
- Commonly used base catalysts include NaOH, KOH, and sodium methoxide (NaOCH3).
- Advantages include low cost, high catalytic activity, and high yields of biodiesel (FAME) from vegetable oils.
- Limitations include the