Coconut fatty acid distillate as novel feedstock for biodiesel production and its characterization as a fuel for diesel engine

The coconut fatty acid distillate (CFAD) was used as a novel feedstock for biodiesel production in this investigation. Its characterization as fuel in diesel engine was also studied. A maximum biodiesel yield of 92.6% was obtained, when esterification is performed with 10:1 methanol to oil ratio, 2.5% sulphuric acid at 60 degrees C for 90 min. This is followed by transesterification with optimized parameters of methanol to oil ratio 8:1, 1.5% potassium hydroxide at 60 degrees C for 90 min. 20%, 40%, 60% and 100% of CFAD biodiesel (CFAB) was added to diesel to form blends CFAB20, CFAB40, CFAB60 and CFAB100. Engine test results showed that the performance of CFAB20 is closer to diesel than the other CFAB blends. The brake thermal efficiency (BTE) of CFAB20 was found to be 4.7% lesser than diesel. Nitrogen oxide emission is higher for all biodiesel blends due to enhanced combustion characteristics. However, carbon monoxide, hydrocarbon and smoke were reduced by 50%, 36.6% and 42.9% respectively for CFAB100 when compared to diesel at full load. Thus it is inferred that the CFAD is a potential source for biodiesel production. CFAB20 can be used in diesel engines with acceptable BTE and reduced emissions without any engine modification. (c) 2020 Elsevier Ltd. All rights reserved.

Automated summary

The study utilized coconut fatty acid distillate for biodiesel production and investigated its performance in diesel engines. The optimal biodiesel yield was 92.6%, with CFAB20 showing the closest performance to diesel and lower emissions.