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All Journal Rekayasa Mesin JURNAL REKAYASA KIMIA & LINGKUNGAN
Nugraheni, Ika Kusuma
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Chemical Engineering, Chemistry & Bioengineering Energy Engineering Mechanical Engineering

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Acetylation of Glycerol Catalyzed by CaO as Octane Booster in Gasoline Fuel Nugraheni, Ika Kusuma; Sokheh, Sahidin; Artika, Kurnia Dwi
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 2 (2025): Jurnal Rekayasa Kimia & Lingkungan (December, 2025) In Press
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i2.45159

Abstract

Glycerol, a byproduct of biodiesel production, can be transformed into value-added compounds such as triacetin, which serves as an effective octane booster in gasoline. This study investigates the acetylation of glycerol with acetic acid using calcium oxide (CaO) as a heterogeneous catalyst. Catalyst concentrations of 1%, 2.5%, 5%, 7.5%, and 10% were tested under reaction conditions of 100C for 180 minutes. The resulting products were analyzed using gas chromatographymass spectrometry (GC-MS) to identify acetylated derivatives. Among the tested conditions, 5% CaO yielded the highest triacetin content. The acetylated product was then blended into gasoline at a 5% concentration. Fuel testing showed an increase in the Research Octane Number (RON) from 84 (pure gasoline) to 93 with the addition of triacetin, along with slight increases in fuel density and viscosity. These findings highlight the potential of CaO-catalyzed glycerol acetylation for producing high-performance fuel additives.
Impregnated Zeolite as Catalyst in Esterification Treatment from High Free Fatty Acids Palm Oil Mill Effluent Nugraheni, Ika Kusuma; Nuryati, Nuryati; Persada, Anggun Angkasa Bela; Triyono, Triyono; Trisunaryanti, Wega
Jurnal Rekayasa Kimia & Lingkungan Vol 16, No 1 (2021): Jurnal Rekayasa Kimia & Lingkungan (June, 2021)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v16i2.16378

Abstract

Although Palm Oil Mill Effluent (POME) can be used as a raw material for biodiesel production, the POME contains an excessive amount of Free Fatty Acids (FFA), necessitating a preliminary process and esterification. POME is degummed using phosphate acid and bleached with carbon active. Additionally, this study used KOH-impregnated zeolite to reduce FFA. The purpose of this study is to determine the effect of adding impregnated zeolite on esterification. POME was heated to 600C for 30 minutes, then degumming with 3 % of phosphate acid for 30 minutes, followed by bleaching with carbon active with a comparison ratio of 8:3 at 1000C for 1 hour, and finally, esterification with 3 percent impregnated zeolite from the POME weight at 600C for 4 hours. The analysis was conducted using titration methods to determine the FFA of each esterification. The data will be compared between zeolite and non-zeolite degumming, bleaching, and esterification. The results indicated that the most effective method for reducing FFA was degumming, bleaching, and esterification with zeolite.
PERAN KOMPOSISI MINERAL PADA AIR GAMBUT DALAM MEMPERCEPAT REAKSI PEMBENTUKAN GAS HIDROGEN PADA PROSES ELEKTROLISIS Musthofa, Imron; Artika, Kurnia Dwi; Hairiyah, Nina; Nugraheni, Ika Kusuma
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1635

Abstract

The existence of peatlands in Indonesia is quite extensive, but many peatlands in Indonesia are not utilized properly. So, peatlands are left as is. The low pH value of peatlands makes it very difficult to use peatlands as agricultural land and can only be planted with grass and other wild plants. Apart from that, the air from peatlands is also very abundant and of course cannot be used for consumption because the pH level is low, ranging from 3.2–4.7. Due to its low pH value, peat water also contains various metallic minerals such as Na, Mg, Al, Fe, Ca, K, and others. The mineral compounds contained in peat water indirectly produce electrolyte properties and can be used as a catalyst to speed up the reaction to produce hydrogen gas using the electrolysis method. The use of peatlands in South Kalimantan as a source of renewable energy, especially in its use as a source of hydrogen gas, is an innovative concept in providing alternative energy potential to support sustainable development. In the electrolysis process, peat water can produce an electrical voltage of 12 V which flows through the cathode and anode. From the results of research that has been carried out, the highest hydrogen gas productivity value in the M4 variable is 29 mL. This is influenced by the number of minerals in the composition of peat water. The highest electric current flowing was 0.17 A, and the highest power produced was 2.1 watts for an electrolysis time of 20 minutes.
Co-Authors Kurnia Dwi Artika, Kurnia Dwi Musthofa, Imron Nuryati Nuryati Persada, Anggun Angkasa Bela Sokheh, Sahidin Triyono Triyono Wega Trisunaryanti