The Effect of Biodiesel Blends Made from Carica papaya L. Seeds on the Performance of Diesel Engine

Fuel oil is one of the important parts to support daily activities.
The demand for fuel oil is increasing every year. Therefore, the search for
the latest energy source is continuously conducted. Carica papaya L. seed
oil is investigated as a renewable energy source replacement part of
petroleum diesel fuel. C. papaya seed oil obtained through the extraction
process using soxhlet method with n-hexane solvent. Then produce methyl
ester by means of transesterification using 1 % NaOH catalyst and 20 %
methanol of the weight of the oil and stirred at 400 rpm for 1 h. A mixture
consisting of 10 % C. papaya seed biodiesel and 90 % petroleum diesel
fuel, called CPSB-10, produces fuel properties that meet the specified
standards by the Indonesian Directorate General of Oil and Gas. From the
result of the performance test in a diesel test engine, the maximum brake
power and brake thermal are consecutively 30.6 kW and 140.23 N m, the
lowest sfc is 268 g kW�1 h�1, and the highest brake thermal efficiency is
32 %.