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All Journal Jurnal Teknik Mesin Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)
Muhaji Muhaji
Universitas Negeri Surabaya
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Flame Behavior During the Combustion of Premixed Kapok Oil Influenced by Oxygen and Magnetic Field Dony Perdana; Muhamad Nur Rohman; Mochammad Khoirul Rosidin; Muhaji Muhaji
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 1 (2025): February 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i1.92-98

Abstract

This study aimed to determine effect of oxygen enrichment and magnetic field direction on the flame behavior kapok oil combustion. Experiment was carried out to obtain flame evolution, temperature and height. Kapok oil (600 ml) was put in the boiler, and heated to 300°C. A burner chamber is placed for the reaction between kapok oil vapor with air from compressor and oxygen. Two permanent magnets of neodymium nickel grade N52 with intensity 1.1 Tesla were placed on side of burner tip. Results showed the magnetic field produce more transparent, slimmer flames with highest temperature of 679°C, lowest flames height of 5 mm. Magnetic fields produce a Lorentz force that breaks the fuel chemical chain and creates magnetic pulses in the flames. Oxygen contained in air around the burner coupled with oxygen enrichment create excessive oxidizing gas to separate and release electrons. Excessive oxygen results in a higher flame temperature due to faster combustion reaction. The magnetic fields around flames induces flow air which magnetically cause heat transfer around the flame, resulted variable flame height. This combustion produces different flame evolution, temperature, and height. Keywords: Flames behavior, Flames colour, Kapok oil, Magnetic field, Premixed combustion.
Bioethanol Characteristics of Musa Paradisiaca Artocarpus Peel Muhaji Muhaji; I Made Arsana; Belina Yunitasari
Jurnal Teknik Mesin (Sinta 3) Vol. 22 No. 1 (2025): APRIL 2025 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.22.1.39-50

Abstract

The objectives of this research are to analyze the chemical and physical properties of bioethanol as well as production costs. Data were collected using experimental methods. The raw material, musa paradisiaca artocarpus Peel, was processed through saccharification, fermentation, and distillation. The experiment used 500 grams of peel, 25 grams of yeast, and 20 grams of urea, with fermentation lasting four days and five-stage distillation conducted at 78°C, utilizing pumice stone adsorbent with a 70-mesh size. Chemical properties of the bioethanol were tested using ASTM standards: ethanol content (D5501), methanol content (D5501), water content (D1744), copper (D1688), acidity (D1613), chloride (D512), sulfur (D2622), and gum content (D381). Physical properties were tested using ASTM standards: density (D1298), kinematic viscosity (D445), flash point (D93), heating value (D240), boil point (D2892), pH (D6423), and octane number (D976). The results of the chemical property analysis showed that the bioethanol contained 99.65%-v ethanol, 0.02% methanol, 0.01% water, 0.02 mg/kg copper, 19 mg/l acidity, 16.75 mg/l chloride, 0.01 mg/l sulfur, and 1.02 mg/100 ml gum. The physical property analysis results revealed a density of 0.787 g/cm³, kinematic viscosity of 1.28 cSt, flash point of 18°C, boiling point of 78°C, heating value of 6985 kcal/kg, pH of 6.9, and an octane number of 107. Production costs for producing 1 litre bioethanol from musa paradisiaca artocarpus Peel with 99.65%-v ethanol content costs Rp.47,782,. Overall, this bioethanol offers excellent performance and environmental benefits, making it a viable alternative to as a substitute or a mixture of gasoline fuels.
Co-Authors Belina Yunitasari Dony Perdana I Made Arsana Mochammad Khoirul Rosidin Muhamad Nur Rohman