RSM Based Optimization of Chemical and Enzymatic Transesterification of Palm Oil: Biodiesel Production and Assessment of Exhaust Emission Levels

Table 1

CCRD design summary of different levels of reaction variables used for transesterification of palm oil for chemical and enzymatic transesterification.

Factor	Name	Units	Low level	High level
𝐴^a	Catalyst concentration	%	00.25	01.25
𝐴^b	Enzyme concentration	%	00.25	01.25
𝐵^a	Reaction time	Minutes	30.00	90.00
𝐵^b	Reaction time	Hours	24.00	96.00
𝐶^a	Reaction temperature	°C	30.00	60.00
𝐶^b	Reaction temperature	°C	30.00	35.00
𝐷^a&b	Alcohol : oil molar ratio		03.00	09.00

aCCRD design for chemical transesterification of palm oil.
^bCCRD design for enzymatic transesterification of palm oil.