Sintesis Senyawa Asilgliserol Dari Minyak Nyamplung Sebagai Bioaditif Peningkat Lubrisitas Minyak Solar Berkadar Sulfur Rendah.

Kahfi, Muhammad Salman Al (2022) Sintesis Senyawa Asilgliserol Dari Minyak Nyamplung Sebagai Bioaditif Peningkat Lubrisitas Minyak Solar Berkadar Sulfur Rendah. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Masalah pelumasan minyak solar berkadar sulfur rendah terhadap mesin diesel menjadi perhatian utama karena proses desulfurisasi yang turut menghilangkan senyawa polar pada minyak solar. Lebih lanjut, penggunaan senyawa aditif dari bahan bakar fosil memiliki degradabilitas rendah dan tidak berkelanjutan. Penggantian senyawa aditif konvensional dengan bio-aditif berbasis minyak nabati akan menjadi pilihan yang menjanjikan. Penelitian ini berfokus pada sintesis senyawa bioaditif asilgliserol dari minyak nyamplung (AG-CIO) melalui dua tahapan reaksi yaitu pembentukan metil ester minyak nyamplung (CIME) dan reaksi gliserolisis. Komposisi asam lemak minyak nyamplung diidentifikasi menggunakan kromatografi gas spektrometer massa (KG-SM) dan senyawa asilgliserol diidentifikasi fraksi asilgliserolnya menggunakan kromatografi gas (KG) dengan proses derivasi menggunakan reagen BSTFA dan MSTFA sesuai dengan acuan metode AOCS Cd 11b-91 tahun revisi 2003 dan ASTM D6584-17. Kinerja tribologi minyak solar, senyawa bioaditif asilgliserol minyak nyamplung (AG-CIO) dan campuran keduanya (0,2-1% v/v) dievaluasi menggunakan instrumen High Frequency Reciprocating Rig (HFRR). Hasil menunjukkan komposisi asam lemak minyak nyamplung terdiri dari 71,04% asam lemak tak jenuh dan 28,96 asam lemak jenuh dengan komposisi mayor asam linoleat (35,88%), asam oleat (34,88%), asam palmitat (17,64%) dan asam stearat (10,13%). Komposisi senyawa bioaditif asilgliserol minyak nyamplung terdiri dari 40,57% monoasilgliserol (MG) dan 8,87% triasilgliserol (DG) berdasarkan metode AOCS Cd 11b-91, revisi 2003. Lebih lanjut, fraksi asilgliserol berdasarkan metode ASTM D6079-18 sebesar 64,81% monoasilgliserol (MAG), 30,39% diasilgliserol (DAG) dan 0,048% triasilgliserol (TAG). Kinerja tribologi senyawa aditif asilgliserol minyak nyamplung memiliki diameter luka aus (DLA), koefisien gesek, dan ketebalan film secara berturut-turut sebesar 214,5 μm, 0,051, dan 86%. Lebih lanjut, penambahan 1% v/v senyawa aditif asilgliserol (AG-CIO) terhadap minyak solar menunjukkan sifat lubrisitas yang baik dibandingkan minyak solar murni tanpa penambahan bioaditif.
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The problem of lubricating low sulfur diesel oil for diesel engines is a major concern because the desulfurization process also removes polar compounds in diesel oil. Furthermore, the use of additive compounds from fossil fuels has low degradability and is not sustainable. Replacing conventional additive compounds with vegetable oil-based bio-additives will be a promising option. This research focuses on the synthesis of acylglycerol bioadditive compounds from nyamplung oil (AG-CIO) through two reaction steps, namely the formation of nyamplung oil methyl esters (CIME) and glycerolysis reaction. The fatty acid composition of nyamplung oil was identified using gas chromatography mass spectrometry (GC-MS) and the acylglycerol compound was identified its acylglycerol fraction using gas chromatography (GC) with derivation process using BSTFA and MSTFA reagent according to the reference method of AOCS Cd 11b-91 revised 2003 and ASTM D6584-17. The tribological performance of diesel oil, bioadditive acylglycerol nyamplung oil (AG-CIO) and their mixtures (0.2-1% v/v) were evaluated using the High Frequency Reciprocating Rig (HFRR) instrument. The results show the fatty acid composition of nyamplung oil consisted of 71.04% unsaturated fatty acids and 28.96 saturated fatty acids with the major composition being linoleic acid (35.88%), oleic acid (34.88%), palmitic acid (17.64%) and stearic acid (10.13%). The composition of the acylglycerol bioadditive compound in nyamplung oil consisted of 40.57% monoacylglycerol (MG) and 8.87% triacylglycerol (DG) based on the AOCS Cd 11b-91 method, revised 2003. Furthermore, the acylglycerol fraction based on the ASTM D6079-18 method was 64, 81% monoacylglycerol (MAG), 30.39% diacylglycerol (DAG) and 0.048% triacylglycerol (TAG). The tribological performance of the acylglycerol additive in nyamplung oil has a wear wound diameter (DLA), friction coefficient, and film thickness of 214.5 m, 0.051, and 86%, respectively. Furthermore, the addition of 1% v/v additive acylglycerol (AG-CIO) to diesel oil showed good lubricity compared to diesel oil without the addition of bioadditives.

Item Type:	Thesis (Other)
Additional Information:	RSKi 660.284 4 Alk s-1 2022
Uncontrolled Keywords:	minyak nyamplung, asilgliserol, bioaditif, peningkat lubrisitas, solar rendah sulfur. nyamplung oil, acylglycerol, bioadditive, lubricity enhancer, low sulfur diesel.
Subjects:	T Technology > TP Chemical technology > TP359.B46 Biodiesel fuels.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	06 May 2026 04:21
Last Modified:	06 May 2026 04:21
URI:	http://repository.its.ac.id/id/eprint/133009

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