Comparison energy (kW h kg⁻¹) and time (min) consumption of biodiesel production from rubber seeds and rubber seeds oil.

Method	Energy consumption (kW h kg−1)	Reaction time (min)	References
Two steps
– Reflux	31.5	157.5	51
– Enzymatic	445.5	600	57
One step
– Reflux	120	120	58
– CDT	9	7	This study