Purifikasi Biodiesel Menggunakan Deep Eutectic Solvent

Niawanti, Helda (2017) Purifikasi Biodiesel Menggunakan Deep Eutectic Solvent. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Purifikasi merupakan langkah penting dalam produksi biodiesel untuk memenuhi standar biodiesel. Biodiesel pada penelitian ini dipurifikasi menggunakan Deep Eutectic Solvent (DES). DES digunakan untuk mengurangi unreacted oil dan unsaponifiable matter pada biodiesel berbahan baku minyak dedak padi. Tujuan dari penelitian ini adalah untuk mempelajari pengaruh waktu ekstraksi, temperatur ekstraksi dan rasio molar crude biodiesel/DES terhadap kadar FAME dan biodiesel recovery. Minyak dedak padi yang digunakan dalam penelitian ini mengandung 16,49% dengan free fatty acid (FFA) sebesar 44,75%. Acid catalyzed methanolysis digunakan untuk mengkonversi minyak dedak padi menjadi biodiesel dengan kondisi operasi: T = 60 °C, t = 8 jam, rasio molar minyak terhadap metanol = 1/10, H2SO4 = 1% w/w minyak. Biodiesel yang diperoleh mengandung 89,05 % FAME dengan konten FFA sangat rendah (0,05%). DES dibuat dari campuran kolin klorida dan etilena glikol dengan rasio molar 1/2. Rasio molar crude biodiesel/DES adalah 1/2, 1/4 dan 1/8. Waktu ekstraksi divariasi dari 15 menit sampai 240 menit dengan temperatur ekstraksi 30, 45 dan 60 °C. Kandungan FAME tertinggi pada studi ini diperoleh setelah ekstraksi selama 240 menit pada suhu 60 °C dan rasio molar crude biodiesel/DES adalah 96,87 %, biodiesel recovery sebesar 89,13 % ± 0,0001 dan FFA 0,01 %. Biodiesel setelah purifikasi lebih stabil dalam penyimpanan, diamati dari rendahnya penurunan iodine value dibandingkan pada crude biodiesel setelah waktu penyimpanan 1 bulan. Penelitian ini menunjukkan bahwa DES memiliki potensi untuk memurnikan biodiesel dari bahan baku non edible oil, seperti minyak dedak padi. ================================================================================================================== Purification is a crucial step in biodiesel production to meet the biodiesel standard. This study purified biodiesel using deep eutectic solvent (DES). DES was used to reduce unreacted oil and unsaponifiable matter in rice bran oil based biodiesel. The objectives of this work were to study the effect of extraction time, extraction temperature and molar rasio biodiesel/DES on the content and recovery of fatty acid methyl ester (FAME). Rice bran used in this work contains 16.49% of oil with initial free fatty acids (FFA) of 44.75%. Acid catalyzed methanolysis was employed to convert rice bran oil (RBO) into biodiesel under following operation conditions: T = 60 oC, t = 8 h, molar ratio of oil to methanol = 1/10, H2SO4 = 1% w/w of oil. Rice bran oil based biodiesel obtained contain 89.05 % of FAME with very low FFA content (0.05 %). DES was made from a mixture of choline chloride and ethylene glycol with molar ratio of 1/2. Molar ratio of crude biodiesel to DES were 1/2, 1/4 and 1/8. Extraction time was varied from 15 minutes to 240 minutes at 30, 45 and 60 oC. The highest FAME content were obtained after purification for 240 min. at 60 oC and molar ratio crude biodiesel to DES 1/8 was 96.87%, biodiesel recovery and FFA at this condition were 89.13 % ± 0.0001 and 0.01 %, respectively. Purified biodiesel was more stable than crude biodiesel during storage, it can be seen from iodine value, purified biodiesel had lower iodine value decreasing than crude biodiesel. This work shows that DES has potential to purify biodiesel from non-edible raw material, such as RBO.

Item Type: Thesis (Masters)
Additional Information: RTK 660.284 2 Nia p
Uncontrolled Keywords: Biodiesel; Deep Eutectic Solvent; FAME; Purifikasi; minyak dedak padi
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Industrial Technology > Chemical Engineering > (S2) Master Theses
Depositing User: Mrs Ansi Aflacha
Date Deposited: 16 May 2017 03:48
Last Modified: 28 Dec 2017 08:27
URI: http://repository.its.ac.id/id/eprint/41278

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