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All Journal LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI Scientific Contributions Oil and Gas
A.S Nasution
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Environmental Science

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Hidrotreating A.S Nasution
Lembaran Publikasi Minyak dan Gas Bumi Vol. 14 No. 3 (1980): LPMGB
Publisher : BBPMGB LEMIGAS

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Abstract

Proses hidrotreating adalah proses katalitik untuk menghilangkan hidrokarbon tak jenuh dan senyawa non-hidrokarbon, dan tujuannya adalah untuk mendapatkan mutu produk minyak yang lebih baik. Contoh hidrokarbon tak jenuh adalah olefin dan aromat. Dan senyawa поп hidrokarbon yang juga dinamakan sebagai "impurities" atau kotoran adalah senyawa metal, senyawa non metal (S, O, N) dan asfalten, Lenyapnya kotoran-kotoran tersebut akan meningkatkan mutu dan stabilitas produk minyak, serta menghilangkan bau, sifat-sifat korosif dan juga mengurangi pencemaran udara.
Proses Hidrodesulfurisasi Asfalten A.S Nasution
Lembaran Publikasi Minyak dan Gas Bumi Vol. 18 No. 3 (1984): LPMGB
Publisher : BBPMGB LEMIGAS

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Abstract

Fraksi berat dari minyak sulfuris mengandung sulfur yang cukup tinggi, yaitu sekitar 85% berat dari total sulfur dari minyak mentah tersebut. Dan 30-50% berat sulfur di dalam fraksi berat tersebut di jumpai dalam senyawa asfalten.
Petrochemical Industries A.S Nasution; Abdul Haris; Morina Morina; Leni Herlina
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.33.2.818

Abstract

Petrochemical processes begin with relatively few basic raw materials, expand into a complex network of chemicals and converge into materials that serve specific functions as consumer products. Then raw material base for the petrochemical industry primarily depends upon the type of intermediates and final products required by industry and consumer. Almost all petrochemicals are derived from three sources: synthesis gas, olefin and aromatic. Production of those three petrochemical sources and the derivative chemicals are described briefly
Selective Hydrocracking Of Heavy Distillate To High Viscosity Index Lube Base Stock By Using Bi-Functional Catalysts A.S Nasution
Scientific Contributions Oil and Gas Vol 28 No 1 (2005)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.28.1.869

Abstract

Hydroprocessing is the catalytic reaction of hydrogen with petroleum or other hydrocarbon materials. It may be carried out for a variety of objectives, including: saturation of olefins or aromaties, molecular rearrangement, or removal of impurity (1).Selective hydrocracking is one of this hydroprocessing to convert higherboiling distillate to lube base stock using a bi-functional catalyst containing both acid site and metal site. Those two active sites of bi-functional catalyst should promote the correct combination of hydrogenation, isomerization and limited hydrocracking function, resulting in the maximum yield of product in the lube oil range (2). The kinetics of this selective hydrocracking greatly depends on the operating conditions: such as feedstock composition, type of catalyst, temperature, pressure, hydrogen to hydrocarbon ratio, and space velocity (6).The versatility of the hydroconversion process with respect to the variety of feedstock are case to study: i.e. the feasibility of the hydroconversion of obtaining lube base stock from heavy distillate.In order to gain more information, an experiment has been carried out to study the selective hydrocracking of vacuum distillate (paraffinic and non paraffinic) by using bifunctional catalysts with various acidity at the following operating conditions: temperature: from 380 to 410 ° C, pressure: 100 kg/cm2 and hydrogen to hydrocarbon ratio: 1000 l/lt. A catatest unit operated in a continuous system was used in this experiment.Gas and liquid product samples were taken from gas and liquid samples, respectively. Liquid product was fractionated to get the following cuts: IBP-380°C and>380°C with 30 theoretical plate fractionator, operating at 4/1 reflux ratio. The >380°C bottom product was treated by dewaxing, using methylisobutyl ketone as a solvent to obtain the lube base stock and wax.
Hydroisomerization Of Paraffin Wax Of Sumatran Light Waxy Residue For Lubricating Oil And Fuel Oils Production Using The BI - Functional Catalysts With Various Acid Supports A.S Nasution
Scientific Contributions Oil and Gas Vol 5 No 1 (1982)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.5.1.905

Abstract

Paraffin wax (average mol wt 750-850) of Sumatran Light Waxy Residue was hydroisomerized by bi-functional catalyst with various acidic com- ponents, using a catetest unit, operated at high temperature and pressure with continous system . The reaction products were distilled at at- mospheric pressure to 380°C and the residues subjected to a dewaxing treat ment at - 20°C. Based on this separation the reaction products were regarded as pseudo three component systems the component being lubricating oil, unconverted wax and cracked products. The lubricating oils obtained in the experiments have a-viscosity index of 122- 16S, With M/AI0-SIO2 type catalyst a maximal oil yield of 28,0 per cent wt was obtained with 25 per cent of cracked products. And at 50 percent by wt of feedstock conversion, the smoke point of kerosene and diesel index of gas oil are 34 and 87 mm respectively. The wux contents in the feedstock is an important source for high viscosity index lubricating oil produC tion obtained by hydroisomerization of this wax.
Co-Authors A. Gafar Abdul Haris Dessy Yoerdiartiny E Jasjfi E. Jasjfi Evita H Legowo Evita H. Legowo Hono Witono Ida Ayu Putu Sri Widnyani LENI HERLINA Morina Morina Morina Oberlin Sidjabat