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All Journal Jurnal Sains Materi Indonesia Kinetika Chemical Engineering Journal Storage (CEJS) Innovative: Journal Of Social Science Research Asian Journal of Social and Humanities Journal Serambi Engineering (JSE)
Martha Aznury
Politeknik Negeri Sriwijaya
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Public Health Other

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Journal : Serambi Engineering

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Pengaruh Variasi Enzim Lipase Amobil Terhadap Rasio Mol CPO: Metanol Pada Transesterifikasi Putri Dania, Elisabeth; Aznury, Martha
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Biodiesel is a renewable and environmentally friendly alternative fuel that can be produced from vegetable oils such as Crude Palm Oil (CPO). This study aims to evaluate the effect of varying the mass of immobilized lipase enzyme (12–16 grams) and the molar ratio of CPO to methanol (1:4 and 1:6) on the quality of biodiesel produced through a transesterification process using a Packed Bed Reactor. The process stages include degumming, neutralization, and transesterification at a reaction temperature of 40°C for 6 hours. Immobilized lipase was chosen as the biocatalyst due to its ability to operate under mild conditions and produce high-quality biodiesel without generating harmful waste. The best result was achieved at a 1:4 molar ratio and 15 grams of enzyme, producing biodiesel with a density of 875.67 g/cm³, viscosity of 3.97 mm²/s, saponification value of 177.65 mg KOH/g, acid value of 0.32 mg KOH/g, iodine value of 48.05 g I₂/100 g, cetane number of 66.21, yield of 90.20%, and methyl ester content of 97.31%. All parameters met the Indonesian National Standard (SNI 7182:2015).
Sintesis Gliserol Stearat Dari Gliserol Produk Industri Minyak Kelapa Sawit Untuk Proses Inhibitor Korosi Wijaya, Ariyanto Hadi; Aznury, Martha; Dewi, Erwana
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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This study aims to synthesize glycerol stearate from palm oil industrial products and test its effectiveness as a corrosion inhibitor on aluminum metal. The synthesis was carried out through an esterification reaction between glycerol and stearic acid using a sulfuric acid catalyst at a temperature of 120°C with a reaction time variation of 120–220 minutes. The synthesized products were characterized using Thin Layer Chromatography (TLC) and Gas Chromatography–Mass Spectrometry (GC-MS) methods. The inhibitor effectiveness test was carried out using a gravimetric method based on the ASTM G31-21 standard in 1 M HCl solution. The results showed an optimum reaction time of 180 minutes with a yield of glycerol monostearate of 16.36%. TLC showed the highest Rf value close to the glycerol monostearate standard, while GC-MS detected the main compounds in the form of glycerol monopalmitate and glycerol monostearate. Effectiveness testing showed that the coating method produced an inhibition efficiency of 76.89%, higher than the direct mixing method of 73.69%. These results indicate that glycerol stearate has the potential to be an effective and environmentally friendly corrosion inhibitor based on biodiesel waste.
Co-Authors ., Sofiah ., Yuniar Abu Hasan Ahmad Muhajir, Ahmad Elfrida Ratnawati Erwana Dewi Fadarina Fiyansah, Toni Okta H.C, Fadarina Hendra Putra, Erwin Ibnu Hajar Illahi, Satria Ridho Indah Purnamasari Marieska, Marieska Mawarni, Tri Muhammad Luthfi Mustain Zamhari Nurjanah, Rizki Puspa, Dilia Putri Dania, Elisabeth Rahma, Aulya Rahmaniar Rahmaniar, Rahmaniar Ramadhan, Akbar RATNA SARI, DEWI Resky, Resky Ripandi, Irfan Robert Junaidi Rosadi, Hengky Saddam Husen, Mohammad Sari, Rezki Prima Serlina, Ayu Siti Chodijah Syamsiar, Syamsiar Wahyu Tomo, Almira Chairunissa Wijaya, Ariyanto Hadi Yunanto, Isnandar Zaman, Muhammad