The Role of Eucalyptus Oil in Crude Palm Oil As Biodiesel Fuel

Abstract

Article InfoUtilization of crude palm oils (CPO) as biodiesel faces difficulty due to their high level of viscosity. Mixing crude eucalyptus oils (CEO) with CPO may reduce the viscosity due to the presence of aromatic compounds in CEO. The single droplet analysis was performed to determine the characteristics of mixing CPO with the CEO. The results showed that the addition of CEO decreased the viscosity due to the presence of intermolecular attractions, thereby leading to more active molecules in the CPO-CEO mixture. Furthermore, the aromatic compound in the CEO helped in decreasing the CPO flash point, while the aromatic compound in the triglyceride molecule weakens the bonds between molecules. The addition of CEO to CPO tends to reduce the ignition delay due to the presence of cineol content in the CEO, which weakens the van der Waals bond in CPO. AbstrakMinyak sawit (CPO) sebagai bahan bakar biodiesel memiliki viskositas yang tinggi, sehingga perlu penanganan untuk mengurangi viskositasnya. Perpaduan minyak kayu putih (CEO) dengan minyak sawit dapat menurunkan nilai viskositas minyak sawit karena adanya senyawa aromatik di dalam minyak kayu putih. Analisa tetesan (single droplet analysis) telah dilakukan untuk menentukan karakteristik campuran dari minyak sawit dengan minyak kayu putih. Penambahan minyak kayu putih menghasilkan penurunan viskositas karena interaksi antar molekul yang saling tarik-menarik. Interaksi ini menghasilkan pergerakan molekul yang lebih aktif pada campuran minyak sawit -minyak kayu putih. Penambahan minyak kayu putih menurunkan titik nyala bahan bakar. Senyawa aromatik dalam minyak kayu putih menjadi faktor utama yang membantu mengurangi nilai titik nyala pada minyak sawit; senyawa aromatik dalam molekul trigliserida menyebabkan ikatan antar molekul menjadi lemah. Penambahan minyak kayu putih pada minyak sawit menghasilkan pengurangan waktu tunda pengapian karena adanya senyawa Cineol pada minyak kayu putih yang melemahkan ikatan van der Waals dalam minyak sawit. Kata-kata kunci: Minyak kayu putih, Minyak sawit, Biodiesel, Droplet

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