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All Journal Jurnal Teknik Mesin Indonesia Scientific Contributions Oil and Gas
Maymuchar Maymuchar
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Industrial & Manufacturing Engineering Mechanical Engineering

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Pengembangan minyak jarak sebagai bahan baku gemuk lumas Milda Fibria; Catur Yuliani; Tri Purnami; M Hanifuddin; Rona Malam; Setyo Widodo; Cahyo S. Wibowo; Maymuchar Maymuchar
Jurnal Teknik Mesin Indonesia Vol 17 No 1 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i1.282

Abstract

Gemuk adalah sebuah kombinasi minyak pelumas dan agen pengental (thickener). Pengentalan memberikan sifat kaku dari gemuk lumas, sebagai pengukur resistansi terhadap deformasi oleh gaya yang bekerja. Pengental (thickener) di gemuk lumas dibuat dengan mereaksi 12-hydroxystearic acid (HSA) dan lithium hydroxide untuk menghasilkan gemuk lumas, yang memiliki resistansi tinggi terhadap air. Kebutuhan 12-HSA dinilai signifikan sebagai pengental gemuk lumas. Produk ini tidak dibuat di Indonesia, sehingga industri gemuk masih bergantung kepada produk impor. Minyak jarak adalah bahan baku untuk pembuatannya, namun sangat banyak diproduksi di Indonesia. Produksi ini diinisiasi untuk mengurangi upaya impor dari 12-HSA dan menggantikan produk impor tersebut. Berdasarkan hasil yang didapatkan, dapat disimpulkan bahwa formula produk bio-grease berbahan minyak jarak menunjukkan kinerja pelumas yang setara dengan kinerja produk dengan 12-HSA impor. Terkadang menghasilkan produk unggul dibandingkan dengan salah satu yang berbahan 12-HSA impor jika perlakuan yang sesuai ditetapkan. Kinerja pelumas akan meningkat dengan penambahan agen kompleks yang juga didapatkan dari minyak jarak. Pemanfaatan minyak jarak di kajian ini menghasilkan peningkatan Domestic Content Level (DCL) di dalam produk bio-grease sebesar lebih dari 95%.
Performance Test Of Calophyllum Inophyllum Biodiesel On a Small Mono-Cylinder 5 Kva Diesel Generator Riesta Anggarani; Cahyo S Wibowo; Maymuchar Maymuchar
Scientific Contributions Oil and Gas Vol 36 No 2 (2013)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.36.2.662

Abstract

Demand of diesel fuel for villagers in rural area of Indonesia is getting higher recently. Electricity and diesel fuel shortage are forcing them to find alternative energy sources for their activities. One of the promising energy sources is Calophyllum inophyllum, which commonly grow in low-land and coastal region. In present work, methyl ester obtained from Calophyllum inophyllum were used on a 5 kVA diesel generator, pure and in 50% blend with commercial diesel fuel which also used pure as reference. A performance test cycle for each fuel was conducted with the aim of taking data of cold and warm start up time, fuel consumption, and exhaust gas emission. In the analysis of cold and warm start up time test result, it revealed that 50% blended of diesel fuel and Calophyllum inophyllum increases both cold and warm start up time when compared to pure diesel fuel and the time got higher for pure Calophyllum inophyllum biodiesel. In the result of fuel consumption, 50% blended fuel increases fuel consumption for 10.8% whereas pure biodiesel increases 16.8% fuel consumption. Analysis on the exhaust gas emission resulted that the use of Calophyllum inophyllum biodiesel and its blend decrease the CO2 emission while CO and HC emission increases. The NOx emission and the opacity of exhaust gas increase for biodiesel blend, similar results were also obtained for pure biodiesel.
Comparision Deposit Formation On The Valve Diesel Engine Caused By Biodiesel And Petroleum Diesel Fuels Maymuchar Maymuchar; Ismoyo Suro Waskito
Scientific Contributions Oil and Gas Vol 35 No 1 (2012)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.35.1.775

Abstract

 The research on the infl uence of the biodiesel to the formation of deposits on the intake and exhaust valves diesel engine has been carried out by means analysis of merit rating. The fuels used on this study are FAME (B-100), a mixture of 50% (v)of FAME in diesel fuel 48 (B-50), and diesel fuel 48 (B-0). The objective of this research is to obtain data which represent the infl uence of the biodiesel to the formation of deposits on the intake and exhaust valve diesel engine. The test used a diesel engine driving 5 KVA generator which is operated for 100 hours with 1.000 Watt electrical load. The results of the study show that the use of either FAME or biodiesel as alternative fuel in the diesel engine generator 5 KVA has a positive effect on reducing the deposit on the intake and exhaust valves.
Study On The Impact Biodiesel Onto Fuel Pump And Nozzle Wear In 5 Kva Generator Diesel Engine Mardono Mardono; Maymuchar Maymuchar
Scientific Contributions Oil and Gas Vol 33 No 2 (2010)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.33.2.814

Abstract

One of diesel fuel functions is to lubricate fuel pump components. Wearing process on fuel pump causes fuel pressure to the combustion chamber will drop. The pump will not distribute the hydrocarbon well in to the combustion chamber, as result incomplete combution process will occur. The objective of this study is to observe the impact of biodiesel on fuel pump and injector of the diesel engine. A 5 KVA generator diesel engine was used in this study and was operated using 48 CN diesel fuel (“Minyak Solar 48”) (B0), biodiesel 50%-volume (B50) and biodiesel 100% (B100). Each of which was subjected to 100 hour running operation and 1000 Watt load. The results of this research show that biodiesel have a positive impact in reducing wear occurence in the generator diesel engine fuel pump components or injector nozzle.
Flame Stability And Fuel Efficiency Of Gas Diffusion Flame On The Backward Facing Step Harinaldi Harinaldi; Maymuchar Maymuchar
Scientific Contributions Oil and Gas Vol 32 No 1 (2009)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.32.1.835

Abstract

Propane and butane injection into the recirculation zone in the fuel area with backward-facing step has a significant effect to the diffusion flame with the characteristic stability which depends on the velocity of the free air stream, the injection position from the step and the injection position to step height ratio. The test result shows that there are two main stable diffusion flames: a stabilized flame in the recirculation zone and a stabilized flame in the shear layer region. There is a decrease of the fuel efficiency due to the effect of the greater ratio of the injection position to the step height and the farther injection position from the steps. The effect of the free air stream velocity is much more significant the injection location near the steps.
The Effect of Methanol-Gasoline (M20) and Ethanol-Gasoline (E20) Blends on Material Compatibility Nurmajid Abdurrojaq; Rizal Zaelani; Belva Adam Haley; Nur Allif Fathurrahman; Riesta Anggarani; Cahyo Setyo Wibowo; Maymuchar Maymuchar
Scientific Contributions Oil and Gas Vol 45 No 2 (2022)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.45.2.1183

Abstract

Alcohol has the potential to be used as an alternative to fossil fuels to reduce total emissions from spark-ignition (SI) engines. The impact of a mixture of 20% methanol and ethanol in gasoline on the compatibility of Ethylene Propylene Diene Monomer (EPDM) and polyamide materials, which are used as fuel hoses in SI vehicles, is presented in this study. The immersion test methodology was employed to study the influence of both types of alcohol on gasoline blend to compatibility properties i.e., hardness and weight change. Based on the result, EPDM and polyamide materials have different characteristics of material compatibility with E20 and M20. Tests on M20 and E20 fuel samples on EPDM material show a higher effect on hardness by 5-9% than pristine gasoline. Additionally, there was no change in the weight of the polyamide material in the RON 90, E20, and M20 test samples. However, there was a change in the hardness of the polyamide material by 6-11% in RON 90, E20, and M20 fuels. Moreover, there was no change in the FTIR spectrum, indicating that there was no dissolution of the EPDM and polyamide materials into the test fuel for 6 weeks of immersion.
Co-Authors Belva Adam Haley Cahyo S Wibowo Cahyo S. Wibowo Cahyo Setyo Wibowo Catur Yuliani Cecep Kusmana Harinaldi Harinaldi Ismoyo Suro Waskito M Hanifuddin Mardono Mardono Milda Fibria Nur Allif Fathurrahman Nurmajid Abdurrojaq Riesta Anggarani Rizal Zaelani Rona Malam Tri Purnami