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All Journal Swara Patra : Majalah Ilmiah PPSDM Migas Scientific Contributions Oil and Gas LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI (LPMGB)
Oberlin Sidjabat
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Energy Environmental Science Mechanical Engineering

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PROSES REFORMASI KATALITIK A.S. Nasution; Oberlin Sidjabat; Abdul Haris; Morina Morina
Swara Patra Vol 1 No 2 (2011): Swara Patra
Publisher : Pusat Pengembangan Sumber Daya Manusia Minyak dan Gas Bumi

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Abstract

Proses separasi minyak bumi adalah proses pertama untuk pemisahan minyak bumi menjadi fraksi-fraksinya. Proses ini meliputi proses distilasi atmosfer dan distilasi vakum, yang menghasilkan nafta, kerosin, distilat vakum dan residu (residu atmosferik dan residu vakum).Dalam rangka meningkatkan nilai tambah fraksi minyak bumi tersebut, maka dilakukan proses tahap kedua, yaitu: konversi, baik berupa proses termal maupun proses katalitik. Bensin mempunyai kisaran titik didih dari 40oC sampai 220oC yang mengandung grup hidrokarbon parafin, olefin, naftena, dan aromatik dengan variasi nilai angka oktananya cukup besar
CATALYTIC PYROLYSIS OF POLYPROPYLENE PLASTIC FROM MUNICIPAL SOLID WASTES INTO GASOLINE FRACTION COMPOUNDS USING THE MIXED NICKEL (Ni) AND CHROME (Cr) METALS AS THE CATALYST Morina Morina; Oberlin Sidjabat
Scientific Contributions Oil and Gas Vol 37 No 3 (2014)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.37.3.634

Abstract

Plastic wastes which come from municipal solid wastes, have been identi􀂿 ed as the worldwideenvironmental problem in the last decades. Chemical recycling is one of the alternative methods to solvesuch problem. Inorder to obtai appropriate liquid fuels, polypropylene plastic waste was degraded thermallyand catalytically in the presence of natural zeolite incorporated with chromium (Cr) and nickel (Ni) metals.The reaction was conducted in a 􀂿 xed bed reactor in the temperature range of 400-500°C. The dependenciesof process temperature and effect of catalyst on yield of the fuel fractions were determined and comparedto commercial gasoline fractions. The current study shows that the major product of thermal degradation(pyrolysis) and catalytic degradation is liquid (gasoline) fraction and the highest products obtained attemperature 450°C is approximately 77.84%. The use of chromium and nickel metals on activated naturalzeolite as a bi-functional catalyst enhance the yield of liquid fractions and the acidity of the catalysts. The liquid product obtained in this process was analyzed using GC for its composition. Synthesized catalysts, activated natural zeolite and natural zeolite were characterized by means of nitrogen physisorption (BET), porosity, X-ray diffraction (XRD), and acidity. Based on the obtained results, the catalyst containing 6% of chromium and 4% of nickel on activated natural zeolite is a good catalyst for conversion of polypropylene plastic wastes to liquid (gasoline) fuels. Catalytic conversion using such catalysts may applicable as an alternative method for recycling plastic wastes to more valuable commodities such as fuel oils. 
THE CHARACTERISTICS OF A MIXTURE OF KEROSENE AND BIODIESEL AS A SUBSTITUTED DIESEL FUEL Oberlin Sidjabat
Scientific Contributions Oil and Gas Vol 36 No 1 (2013)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.36.1.649

Abstract

Physicochemical properties characterization a mixture of biodiesel and kerosene were carried out toinvestigate their potential use as a substituted diesel fuel for domestic purposes. The characteristic assessmentswere done by comparing the standard requirement for diesel fuel. The properties characterization of thebiodiesel blends with kerosene were density, viscosity, pour point, cloud point, distillation, and cetane number,which is related to the cold fl ow properties of biodiesel. The characteristics fuel property of biodiesel blendswith kerosene in proportion at 2.5:97.5, 5:95, 10:90, 15:85, 20:80, 30:70, and 50:50 was found mostlymeet the requirement the specifi cation of diesel fuel. Biodiesel is mixed with kerosene to bring many of thebenefi cial characteristics to be a substituted diesel fuel. Overall physicochemical characteristics of blendingfuel were reduced by the increasing of kerosene concentrations. Kerosene can play a role as a diluent agentto reduce the characteristic of cold fl ow properties of biodiesel.
Influence Of Feedstocks In Biodiesel Production On Its Physico-Chemical Properties Of Product : A Review Oberlin Sidjabat
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.36.3.767

Abstract

 Biodiesel is attracting increasing attention worldwide as a substituted petroleum diesel fuel or a blending component in transport sector. Biodiesel also become more attractive because of its environmental benefits and the fact that it is made from renewable resources. Biodiesel feedstock can be divided into four main categories: (i). Edible vegetable oi; (ii). Non-edible vegetable oil, (iii); Waste or used cooking oil; and (iv). Animal fats. There are two major factors to take into consideration when dealing with feedstock for biodiesel production i.e the source and composition. Biodiesel feedstocks have three main types of fatty acids as the main compounds that are present in a triglyceride: saturated (Cn:0), monounsaturated (Cn:1) and polyunsaturated (Cn:2,3). The overall biodiesel physicochemical properties are strongly influenced by the properties of individual fatty acid esters in biodiesel. Fatty acid composition varies for all biodiesel feedstocks that affected the product quality. Important fuel properties of biodiesel that are influenced by the fatty acid composition are viscosity, cetane number, heating/ calorific value, cloud point,and oxidation stability. Oxidation stability is one of the major issues influencing the use of biodiesel or FAME (fatty acid methyl ester), due to the nature of biodiesel, makes it more susceptible to oxidation or auto-oxidation during long-term storage than petroleum diesel fuel. The oxidation stability values of the biodiesel range from 0.4 hr (for the most unsaturated biodiesel, linseed) to 35.5 hr (for the most saturated one, coconut).
Development Of Catalyctic Converter For Unleaded Gosaline Program In Indonesia Oberlin Sidjabat; E. Jasjfi
Scientific Contributions Oil and Gas Vol 21 No 1 (1998)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.21.1.952

Abstract

Recent economic development in Indonesia, as in other ASEAN countrie, has resulted in improved prosperity as reflected by the significant increase in the numbers of motor vehicles, particulary in big cities. This growth in car population and traffic is unfortunately accompanied by increase in not only of the country’s energy consumption but also increased air pollution. Almost 70% of atmospheric pollution in big cities is reported to be contributed by motor vehicles.In view of this situation, the Government of Indonesia has launched the “Blue Sky program” and introduced unleaded gasoline. Indonesia manufacturing industries have responded also by designing “nationalautomobiles” to be fabricated in Indonesia, and to run with unleaded gasoline. Some of these vehicles will be equipped with catalytic converters to reduce exhaust gas emissions.In support of this program, LEMIGAS R/D Center for Oil and Gas Technology is developingits-own catalytic converters that can be fitted into these cars. The work carried out toward this end is outlined briefly in this paper
Proses Polimerisasi Olefin dan Peranannya dalam Pembuatan Bensin Ramah Lingkungan A.S Nasution; Morina Morina; Oberlin Sidjabat
Lembaran publikasi minyak dan gas bumi Vol 40 No 3 (2006)
Publisher : BBPMGB LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/LPMGB.40.3.198

Abstract

F
Pengolahan Minyak Goreng Bekas (Jelantah) menjadi Bahan Bakar Setara Solar (Biodiesel) dengan Proses Transesterifikasi Oberlin Sidjabat
Lembaran publikasi minyak dan gas bumi Vol 38 No 2 (2004)
Publisher : BBPMGB LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/LPMGB.38.2.751

Abstract

Minyak goreng bekas atau yang sehari-hari disebut jelantah, merupakan salah satu sumber polusi apabila dibuang sembarangan. Pengertian istilah jelantah adalah sisa-sisa dari minyak goreng setelah digunakan beberapa kali. Pada umumnya minyak goreng bekas mengandung senyawa-senyawa antara lain: polimer, aldehida, asam lemak, senyawa aromatik, dan lakton. Untuk menghindari bahaya yang dapat ditimbulkan maka perlu dicari jalan keluar untuk memanfaatkan minyak goreng bekas tersebut. Salah satu cara adalah dengan mengolahnya melalui proses kimia, dalam hal ini transesterifikasi, yang sangat sederhana (Kac, 2003). Di sisi lain, bahan bakar minyak banyak menghasilkan gas buang yang dapat menyebabkan pencemaran lingkungan sehingga perlu dicari bahan bakar yang akrab lingkungan. Salah satu bahan bakar yang akrab lingkungan adalah biodiesel. Biodiesel adalah suatu nama generik untuk bahan bakar setara bahan bakar minyak solar yang diperoleh dari sumber yang dapat diperbaharui (renewable sources), minyak nabati dan lemak hewan, dengan proses esterifikasi yaitu dengan mereaksikan minyak dan alkohol dengan bantuan suatu katalis. Biodiesel mempunyai kelebihan bila dibandingkan dengan bahan bakar minyak diesel (solar) yang diperoleh dari minyak bumi, antara lain: mempunyai sifat pelumasan yang lebih baik sehingga memperpanjang umur mesin; merupakan bahan bakar yang aman karena mudah ditangani dan tidak beracun; mempunyai gas buang yang relatif bersih
Co-Authors A.S Nasution A.S Nasution A.S. Nasution Abdul Gafar Abdul Haris E. Jasjfi Ida Ayu Putu Sri Widnyani Morina Morina Morina Rasdinal Ibrahim Triyono Wega Trisunaryanti