The study revealed that Hura crepitans oil is a good candidate for Hura crepitans methyl ester (HCME)
production. Two steps (esterification and transesterification) production stages influenced the high yield of
HCME. Three possible experimental runs were performed in each step, the best of the three conditions
were 1.45 (% v/v) for H2SO4 conc., 5:1 for methanol/oil molar ratio, 40 min for reaction time which gave
1.06 % for FFA in the first step, in the second step, 92.70 %(w/w) of HCME was obtained at 0.55% KOH,
5:1 methanol/oil molar ratio, 60 oC temperature and 30 min reaction time. The produced HCME had fuel
properties which satisfied both ASTME D6751 and EN 1424 standards. The fatty acid profile of the HCME
revealed the dominant fatty acids were linoleic (64.50%), oleic (17.54%) and palmitic (12.70%). Exhaust
emissions from an internal combustion (I.C.) engine revealed that there is 60% decreased in CO, 58%
decreased in NOx, 60% decreased in HC, 39% decrease in smoke opacity and 42% decreased in BSFC
at B20, respectively. Flue gas temperature increased by 12% at B20, 45% increased in BTE at B50 when
compared to pure diesel (AGO). Hence, it can be concluded that
B20 (20% HCME + 80% AGO) will provides the best emission reduction at the lowest cost