4. CONCLUSION

Huskcatacid and Huskcatbase have been successfully developed from rice husk ash and employed as heterogenous solid support for the production of biodiesel from PFAD. The catalysts were conveniently prepared and employed in the esterification and transesterification reaction to afford high yield of biodiesel (>97% yield) with reusability up to three times. The biodiesel performance was demonstrated on alternative diesel engine with only small amount of smoke emission compared to the commercial diesel. This study indicated that rice husk demonstrated a good potential as solid support heterogeneous catalysts and feedstock for value-added products, which also assists to overcome agricultural waste management issues.