PENGARUH KOMPOSISI MINYAK KELAPA DAN MINYAK NYAMPLUNG TERHADAP SIFAT BAHAN BAKAR DENGAN WAKTU REAKSI 30 MENIT DAN TEMPERATUR 90°C
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The need for resources in Indonesia from year to year continues to increase in line with the rapid growth of population and economic growth. The use of fossil energy sources increasingly depleted the year while the world population is always increasing, for alternative energy needs that can be used as energy (renewable) one of them is vegetable oil. Vegetable oil is an alternative fuel that can be renewed and environmentally friendly. The raw material used is a mixture of coconut oil and calophyllum inophyllum oil. This study examined the density, viscosity, flash point, and calorific value. Variations of mixed composition between coconut oil and calophyllum inophyllum oil 100.0, 90.10, 80.20, 70.30, 60.40, 50.50, 40.60, 30.70, 20.80, 10.90, and 0.100 (%) for 30 minutes with a temperature of 90°C. Then tested using a NDJ 8S viscometer and a digital balance sheet. In addition to the viscosity test, the heat value test is also performed to determine the amount of heat (heat) obtained by the combustion process with oxygen fuel. No density test results meet SNI 7182-2015 standard, 100% yielded coconut density of 890,690 kg/m3 and 100% calophyllum inophyllum oil density is 915,298 kg/m3. No viscosity test results meet SNI 7182-2015 standard, 100% coconut oil viscosity produced 23,128 cSt and 100% calophyllum inophyllum oil viscosity was 49,601 cSt. While the results of flash point test meets the standard SNI 7182-2015. Flash point of coconut oil 100% is 289,5°C and flash point 100% calophyllum inophyllum oil is 201,9°C. The calorific value obtained by 100% coconut oil is 8468,8623 Cal/g and 100% calophyllum inophyllum oil is 9227,7663 Cal/g. So the more the mixture of oil calophyllum inophyllum then the calorific value will increase.