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All Journal Jurnal Media Akademik (JMA) LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI Scientific Contributions Oil and Gas
Cahyo Setyo Wibowo
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Religion Humanities Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Social Sciences Other

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Analysis On Dimethyl Ether (Dme) Characteristics As A Liquid Petroleum Gas (Lpg) Fuel Substitution For Household Stove Cahyo Setyo Wibowo; Riesta Anggarani; Dimitri Rulianto; Lies Aisyah
Scientific Contributions Oil and Gas Vol 36 No 3 (2013)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.36.3.768

Abstract

Increasing growth of population will lead to increasing energy needs; therefore it is necessary to find alternative energy other than fossil fuel. Currently, energy sources in Indonesia are mainly derived from oil and natural gas such as LPG. Starting from 2008, LPG demand increased significantly for households and small industries as a result of government policy on conversion of kerosene to LPG. To meet this demand, the government imports LPG up to 2 million tons per year. In order to overcome LPG crisis, an alternative energy is required to be developed without changing either the distribution system, technical or commercial used. An option among others is dimethyl ether (DME) derived from low calori’s coal gasification. In this research analysis characteristics of DME is compared to LPG (as fuel reference) used. The test methods carried out refers to the specification of LPG issued by Directorate General of Oil and Gas. Based on the results, it shows that the characteristics of the fuel LPG mixed with DME 20% and 50% have some good results particularly on physical and chemical properties, stability and homogeneous of gas. Hence, LPG mixed DME 20% and 50% can be used as a substitute fuel for household stove.
Oxidation Stability Improvement For Jatropha Biodiesel To Meet The International Standard For Automotive Applications Rizqon Fajar; Cahyo Setyo Wibowo; Siti Yubaidah
Scientific Contributions Oil and Gas Vol 34 No 1 (2011)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.34.1.794

Abstract

Biodiesel from Jatropha oil has several advantages compared to which from Palm oil, among others better cold flow properties (lower cloud point, pour point and CFPP). However, Jatropha biodiesel has an oxidation stability that is too low (2-3 hours) so that its application in the diesel engine is not acceptable. This paper reports the effect of addition of Palm bodiesel and commercial anti-oxidant on the oxidation stability of Jatropha biodiesel. The objective of this research is to find the formulation for Jatropha biodiesel which will meet the oxidation stability determined by World Wide Fuel Charter 2009 (WWFC) of min.10 hours. The required addition of BHT into Jatropha biodiesel is more than 10000 ppm to meet the WWFC specification. The addition of BHT will decrease to less than 10000 ppm if the Jatropha biodiesel was blended with Palm biodiesel as much as 60% v/v. Addition of antioxidant should be limited to a minimum value because there are also concerns about the negative effects of antioxidants on the engine components
A Review Of Biodiesel Development In Indonesia: Current Status, Future Potential And Its Impact On The Environment Lies Aisyah; Cahyo Setyo Wibowo
Scientific Contributions Oil and Gas Vol 34 No 3 (2011)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.34.3.804

Abstract

Indonesian government issued National Energy Policy in 2006 that will reduce role of fossil fuels and increase role of renewable energy in 2025 as a target year. Bio-fuels are one of the renewable energy focuses in Indonesia. In 2009, biodiesel production capacity was 1.12 tons per year and expected to rise every year. Target of biodiesel usage increasesgradually from B-10 in 2006-2010, B-15 in 2011-2016 and B-20 in 2016-2025. The policy and its target are set by the government to diversification energy source, to boost economic growth (especially regional development and creation of employment) and to reduce greenhouse gas emissions. Currently the main feedstock of biodiesel in Indonesia is derived from palm oil. Some concerns arise related to palm oil biodiesel such as competition between food versus energy and environmental issue in particular replacing forest to oil palm plantations and biodiversity loss. Therefore, development of biodiesel feedstock from non-edible crops and can be grown in non-arable land are very important for future biodiesel development in order to eliminate competition with food and prevent deforestation and biodiversity loss.
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.
ANALISIS VOLUME ARUS LALU LINTAS PADA SIMPANG TIGA DI KAWASAN JALAN STASIUN-JALAN WIJAYA KUSUMA JEMBER Cahyo Setyo Wibowo; Amri Gunasti
Jurnal Media Akademik (JMA) Vol. 4 No. 1 (2026): JURNAL MEDIA AKADEMIK Edisi Januari
Publisher : PT. Media Akademik Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62281/6kcvn355

Abstract

Penelitian ini bertujuan untuk menganalisis perbedaan volume sepeda motor pada pagi dan sore hari di kawasan Jalan Stasiun menuju Jalan Wijaya Kusuma sebagai jam puncak di kawasan tersebut. Data yang diperoleh hasil dari observasi lapangan secara langsung pada jam tertentu pagi (06.30-8.00) dan sore (16.30-18.00) yang merupakan jam sibuk pengendara, dengan mendapatkan hasil 12 pasangan data pengamatan. Dengan fokus pengamatan pada pola arus kendaraan dan kepadatan arus lalu lintas (Musran and Massara n.d.-a). Data dianalisis menggunakan perangkat lunak SPSS untuk mengetahui apakah ada perbedaan yang signifikan antara kedua waktu tersebut. Sehingga mendapatkan hasil analisis rata-rata volume sepeda motor pagi sebesar 30,58 kendaraan dan pada sore hari sebesar 30,67. Uji Wilcoxon menghasilkan nilai signifikan sebesar 0,906 (p>0,05) yang mengidentifikasikan tidak terdapat perbedaan yang signifikan anatara volume lalu lintas pagi dan sore hari. Dengan temuan ini menunjukkan arus lalu lintas sepeda motor relatif stabil sepanjang hari bahwa kapasitas ruas jalan masih mampu melayani volume lalu lintas pada waktu tersebut. Hasil dari penelitian ini dapat digunakan sebegai evaluasi kinerja ruas jalan dan perencanaan manajemen lalu lintas di Kawasan tersebut.
Co-Authors Amri Gunasti Bambang Suryawan Belva Adam Haley Dimaz Warahadi Dimitri Rulianto Dimitri Rulianto Rulianto Dimitri Yulianto Emi Yuliarita Emy Yuliarita Faqih Supriyadi Hery Widhiarto I Made Kartika D Imansyah Ibnu Hakim Lies Aisyah Lies Aisyah Maymuchar Maymuchar Maymuchar Nanang H Nanang Hermawan Nandy Putra Nur Allif Fathurrahman Nurmajid Abdurrojaq Reza Sukaraharja Riesta Anggarani Rizal Zaelani Rizqon Fajar Siti Yubaidah Sugeng Riyono Sylvia Ayu Bethari Yogi Pramudito