The study revealed that Hura crepitans oil is a good candidate for Hura crepitans methyl ester (HCME)udproduction. Two steps (esterification and transesterification) production stages influenced the high yield ofudHCME. Three possible experimental runs were performed in each step, the best of the three conditionsudwere 1.45 (% v/v) for H2SO4 conc., 5:1 for methanol/oil molar ratio, 40 min for reaction time which gaveud1.06 % for FFA in the first step, in the second step, 92.70 %(w/w) of HCME was obtained at 0.55% KOH,ud5:1 methanol/oil molar ratio, 60 oC temperature and 30 min reaction time. The produced HCME had fueludproperties which satisfied both ASTME D6751 and EN 1424 standards. The fatty acid profile of the HCMEudrevealed the dominant fatty acids were linoleic (64.50%), oleic (17.54%) and palmitic (12.70%). Exhaustudemissions from an internal combustion (I.C.) engine revealed that there is 60% decreased in CO, 58%uddecreased in NOx, 60% decreased in HC, 39% decrease in smoke opacity and 42% decreased in BSFCudat B20, respectively. Flue gas temperature increased by 12% at B20, 45% increased in BTE at B50 whenudcompared to pure diesel (AGO). Hence, it can be concluded thatudB20 (20% HCME + 80% AGO) will provides the best emission reduction at the lowest cost.
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