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All Journal Swara Patra : Majalah Ilmiah PPSDM Migas Scientific Contribution Oil and Gas LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI
A.S. Nasution
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Energy Engineering Environmental Science Mechanical Engineering

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INFLUENCE OF THE CATALYST ACIDITY ON THE HYDROCRACKING OF MINAS VACUUM DISTILLATE INTO MIDDLE DISTILLATE. A.S. Nasution
Scientific Contributions Oil and Gas Vol. 9 No. 1 (1986): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.9.1.206

Abstract

Hydrocracking process is probably the most versatile of modern petroleum process. This versatility has been achieved by the development of specific families of catalysts, of processing schemes designed to allow these catalysts to function efficiently and optimal refining relationships between hydrocracking and other refinery processes. A study was conducted to determine the hydrochocking of Minas vacuum distillate into middle distillate with the operating conditions : temperature: from 390° to 410°C pressure : 100 kg/cm2 and H2/HC ratio = 1000 lt/lt. A catatest unit operated in a continuous system was used in these experiments. The experimental data show that the conversion of the feedstock, the actuation energy and the product characteristics of" Minas vacuum distillate hydrocracking depended on the operating temperature and the acidity of the catalyst, And low acidity of Ni-Mo/Al2 03SiO2 catalyst produce a high selectivity of middle distillare.
HYDROISOMERIZATION OF CYCLOHEXANE AND N-HEPTANE USING Ni-Mo AND Ni-W CATALYSTS SUPORTED ON SILICA-ALUMINA A.S. Nasution
Scientific Contributions Oil and Gas Vol. 10 No. 1 (1987): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.10.1.215

Abstract

An experiment has been carried out to study the influence of hydrogenating site of bi-functional and of butylamine on the hydroisomerization cyclohexane and n-heptane. The observed data show that a high activity of hydrogenating ste of bi-functional catalyst, tends to increase the cataly tic activity of hydroisomeri- zation reaction and n-butylamine acts as catalyst poison, which reduces the isomer products.
Gas Oil Components And The Effects Of The Changing Gas Oil Quality Requirement A.S. Nasution; E. Jasjfi
Scientific Contributions Oil and Gas Vol. 21 No. 1 (1998): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.21.1.254

Abstract

The survey of gas oil production and impact of more stringent specification on the catalyst performance of ASEAN refineries conducted in 1996 revealed that a total feedstock of 5,673 MBPSD are processed into 1,131 MBPSD gas oil. This consist of the following product distribution: straight-run gas oil 85.44%, thermal cracked gas oil 2.52% cat. Cracked gas oil 3.50% and hydrocracked gas oil 8.54% on total gas oil products. About 50% of this total gas oil is processed in hydrotreating processes to improve the performanceof diesel oil.This paper reviews the production of gas oil components in ASEAN and the effect of the changing gas oil quality requirement on hydrotreating catalyst performance.
Hydroconversion Of Heavy Distillate Into Lube Base Stock Using Bi-Functional Catalysts A.S. Nasution; E. Jasjfi
Scientific Contributions Oil and Gas Vol. 21 No. 2 (1998): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.21.2.260

Abstract

Hydroconversion process replaces the furfural stage and dewaxing part of conventional processs of lube base stock production. To study the ability of this hydroconversion process to weed low viscosity index component out of heavy distillate fraction to produce high viscosity index lube base stock, an experiment has been carried out on the hydroconversion of three feedstock types, I,e,: non-paraffinic vacuum distillate (NPVD), paraffinic vacuum distillate (PVD) and paraffin-wax (WAX), using three bifunctional catalysts having low, medium abd high acidities. The experiment was done at the following operating conditions: temperature from 380° to 420°C, pressure: 100 kg/cm² and H₂/HC ratio: 1000 L/L using a Catatest Unit operated in continuous system. The experimental data shows that at 50% by wt. feedstock conversion, the yields and viscosity index of lube base stock product are 20.7% by wt. and 118; 25.5% by wt. and 136; and 29.5% by wt. and 164 for NPVD, PVD and high acidity bifunctional catalysts, respectively. By conventional process, PVD feedstock produces 10-15% by wt. lube base stock with viscosity index lube 90 to 100. The high viscosity index of lube base stock product, obtained by hydroconversion process, suggest that a part of condensed aromatics is converted into naphthenes, which are then selectivity hydrocracked into single alkyl aromatics by both the metal site and acid site of the bifunctional catalysts. With medium and high acidity bifunctional catalysts, isomerization and cyclization of wax feedstock into isoparaffins and single ring alkyl-naphthene ring of vacuum distillate feedstock into single ring alkyl-aromatic is quite dominant with medium acidity catalyst.
INFLUENCE OF HYDROCARBON COMPOSITION OF NAPHTHA FEED ON THE YIELD AND OCTANE NUMBER OF REFORMATE A.S. Nasution
Scientific Contributions Oil and Gas Vol. 27 No. 1 (2004): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

Therapidly increasingdemandfor high octane num-ber gasoline and aromatic hydrocarbon as a petrochemi-cal feedstock has promoted refiners to seek methodsof improving yields of ihese valuable products.
DRIVEABILITY INDEX OF COMMERCIAL GASOLINE IN ASEAN COUNTRIES A.S. Nasution; E. Jasjfi
Scientific Contributions Oil and Gas Vol. 29 No. 3 (2006): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

Motor gasoline is essentialy a complex mixtureof hydrocarbons distilling between about 40°C and225°C and consisting of compounds generaly in therange C5 to C12. Small amounts of additives are alsoused to exchange various aspects of the performanceof the fuel.
INFLUENCE OF THIOPHENE ON THE CONVERSION OF METHYL-CYCLOPENTANE AND N. HEXANE TO BENZENE USING MONO-AND BI-METALLIC REFORMING CATALYSTS by A.S. Nasution
Scientific Contributions Oil and Gas Vol. 27 No. 3 (2004): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

Paraffin and naphthene hydrocarbons are usually themajor component in the naptha reforming feedstock.Thus the conversion of these hydrocarbon to high oc-tane motor gasoline and aromatic hydrocarbon is one ofthe important reactions of the catalytic reforming pro-cess.
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): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

Hydroprocessing is the catalytic reaction ofhydro-gen with petroleum or other hydrocarbon materials. Itmay be carried out for a variety of objeclives, including:saturation of olefins or aromatics, molecular rearrange-ment, or removal of impurity (1).
PRODUCTION OF UNLEADED GASOLINE IN ASEAN COUNTRIES A.S. Nasution; E. Jasjfi
Scientific Contributions Oil and Gas Vol. 29 No. 2 (2006): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

Worldwide crude supply is experiencing a mod-est trend towards heavier and high sulfur content.The Middle East, being traditionally the world’s ma-jor oil exporting region, will continue to be the princi-pal supplier of lower quality crude’s in the future1'1.
PRODUCTION OF CLEAN DIESEL OILS A.S. Nasution; E. Jasjfi; Evita H Legowo
Scientific Contributions Oil and Gas Vol. 28 No. 2 (2005): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

Cars and fuels have been developed simultaneouslyand nowadays cars deniand a very sophisticated fuelindeed. Environmental restriction and efforts to minimizethe pollution problem by exhaust gases are causing de-sign changes in cars that in turn are having some effectson fuel qualily.
Co-Authors Abdul Gafar Abdul Haris Chairil Anwar E. Jasjfi Evita H Legowo Evita H. Legowo Morina Morina Morina Oberlin Sidjabat Rasdinal Ibrahim