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Scientific Contributions Oil and Gas
Published by LEMIGAS
ISSN : 20893361     EISSN : 25410520     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Energy
The Scientific Contributions for Oil and Gas is the official journal of the Testing Center for Oil and Gas LEMIGAS for the dissemination of information on research activities, technology engineering development and laboratory testing in the oil and gas field. Manuscripts in English are accepted from all in any institutions, college and industry oil and gas throughout the country and overseas.
Arjuna Subject : Energi (semua kategori) - Teknologi Bahan Bakar
Articles 619 Documents
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INFLUENCE OF THE PARTICLE SIZE OF CATALYST ON THE HYDROCRACKING OF VACUUM DISTILLATE INTO MIDDLE DISTILLATE AND LUBRICANT BASE STOCK A.S. Nasution
Scientific Contributions Oil and Gas Vol 8 No 2 (1985)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.8.2.1160

Abstract

In order to obtain more data on the hydrocracking catalysts, an experiment has been carried out to study the hydrocracking of vacuum distillate into middle distillate with operating conditions: temperature: From 390 to 420°C: LHSV: from 0.45 to 0.90;  presRure: 125 kg/cm and HHC ratio: 1000 It/lt by using Two Ni-Mo/Al 03 SIO, catalysts with various particle stzes using a Catatest unit operated in a continuous sys- tem.Gas product sample was analyzed by using a gas-liquid chromatography, The liquid product were fractionated and bottom products were dewaxed by solvent dewaxing.Based on the experimental data show that :By increasing the operating temperature, LHSV, and decreasing of the particle size of the Ni-Mo/Al0Si0, cutalyst, the conversion rate, the quality of the middle distillate, and the lubricant base stocks products in  - crease, but the selectivity of these products will decrease.At operating conditions T= 400°C, P-125 kg/cm;  LHSV = 0.45;  and H/HC ratio : 1000 It/lt, the conversion rate, smoke point of kerosene, diesel index of gas oll, viscosity index of lubricant base stock decrease from: 54.08 to 50.08% by weight;  from 22 to 16 mm, from 62.0 to 57.7 and from 133 to 118 for the low particle size and high particle size of the Ni-Mo/Al 0rSiO, catalysts respectively.  The apparent activation energy of vacuum distillate is obtained 28,717 and 23,720 kcal/mol for the low par ticle size and the high particle size of the Ni-Mo/Al-0SIO2 catalyst respectively.
A COMPUTER PROGAM FOR COMPUTING SISMIC WAVE REFLECTION AND TRANSMISSION COEFFICIENTS OF A SINGLE INTERFACE Suprajitno Munadi
Scientific Contributions Oil and Gas Vol 8 No 2 (1985)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.8.2.1161

Abstract

Reflection and transmission properties of a single interface form the basic step in understanding and solving many problems of seismic waves propagation in multilayered media.  The computational procedure of these coefficients is an essential element for numerical modeling or simulation purposes.  A computer program for computing seismic wave reflection and transmission coefficients of a single interface has been effectively performed using the Gauss-Jordan elimination technique which is operated on a 4x 4 system of simultaneous linear equations with complex elements.  The simultaneous equations have been ar ranged in matribx from.  Elements of the matrix are obtained from the application of the boundary conditions to the solution of the seismic wave equations.  The reflection and transmission coefficients for the compressional and shear waves constitute the unknowns of the simultaneous linear equations.  Experiments using the program demonstrate the efficiency and the precislon of this procedure.
5th ANNUAL ASCOPE LABORATORY TEST CORRELATION PROGAMME ON CFR ENGINE (1983) Bustani Mustafa; E. Jasjfi
Scientific Contributions Oil and Gas Vol 8 No 2 (1985)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.8.2.1162

Abstract

A high precision CFR Engine Laboratory operating according to standard requirement is a must in the oil industry, It is also of very high importance within work of research activities on the use of hydrocarbon fuels. In ASEAN we have the ASCOPE correlation program on CFR engine laboratory to obtain precinion data in the gusoline by CFR test research method.  Member countries taking part in the 5 laboratory test correlation program for CFR engines are Indonesia as coordinator with six participating laboratories, Malaysia, Philippines, Singupore and Thailand with two laboratories each and USA with are laboratory. The 5th correlation program was started by sending sample by the program correlation in Jamuary, 1983 after being tested the participating laboratories, the test renilt were sent to the program coordinator who procured the result for the determination of standard deviation according to precision and statistics.  Based on result, conclusion can be drawn about the deviation of laboratory test results.
GENERATION AND MATURATION OF HYDROCARBONS IN CEPU AREA, CENTRAL JAVA B. Situmorang; Ludin Tambunan
Scientific Contributions Oil and Gas Vol 8 No 1 (1985)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.8.1.1163

Abstract

Production from the Cepu area occurs from the Tuban and Kawengan Formations. Studies of organie richness and thermal maturity of thirty eight comventional core sanples from four wells penetrating the units by use of Rock-esal pyrolysis method reveal that a high total organic content (>0.30%) occurs in part of the Tuban Formation whereas a low total organie content (0.170.07%) is observed in the Kawengan Formation. Thermal maturity range is immature to maature with T-max ranging from 339°C to 435°C with the mature stage being confined to the Tuban Formation. The main kerogen type is structured kerogen (type III), with limited occurrence of unstructured kerogen (type II).Those results muggest that generution of gas occurred probably in the Tuban Fomation, vertically mi- grated and trapped at relatively shallow depths. It also implies that the more mature source-beds with marine kerogen could be found in the deeper sedimentary 
CONVERSION OF NORMAL HEXANE AND METHYLCYCLOPENTANE INTO BENZENE BY USING REFORMING CATALYST A.S. Nasution; E. Jasjfi
Scientific Contributions Oil and Gas Vol 8 No 1 (1985)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.8.1.1164

Abstract

As the significant amount of paraffins and naphthenes in the reforming feedstock, the conversion of these hydrocarbons to aromatic in the catalytic reforming process thus plays an important role. An experiment has been carried out to study the reaction rate of normal hexane and methylcyclopentane into benzene by using reforming catalyst
1982 4th ASCOPE LABORATORIES TEST CORRELATION PROGRAMME ON C.F.R. ENGINE Bustani Mustafa; E. Jasjfi
Scientific Contributions Oil and Gas Vol 8 No 1 (1985)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.8.1.1165

Abstract

Member countries taking part in this correlation programme are Indonesia as coordinator with seven laboratories participating.
HYDROCRACKING OF VACUUM DISTILLATE AND LUBRICANT BASE STOCK PRODUCTION A.S. Nasution
Scientific Contributions Oil and Gas Vol 7 No 1 (1984)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.7.1.1166

Abstract

Hydrocracking of vacuum distillate for middle distillate and lubricant base stock production has been carried out with temperature (from 400° to 420°). Hourly Liquid Space Velocity (from 0.422 to 0.88), Pressure (100 kg/cm2) and H2/Hydrocarbon ratio (1000 It/lt), by using a Catatest unit apparatus.
DEHYDROCYCLIZATION OF NORMAL HEPTANE TO TOLUENE USING BI-METALLIC REFORMING CATALYSTS A.S. Nasution
Scientific Contributions Oil and Gas Vol 7 No 2 (1984)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.7.2.1167

Abstract

Dehydrocyclization of n-heptane and the influence of benzene on this reaction has been carried out with bi-metallic reforming catalyst at the operating temperature : (from 450° to 490C), pressure (from 10 to 30 kg/cm), H/lydrocarbon (from 4 to 12 mole/mote) by using a Catatest unit apparatur.
2nd Annual ASCOPE Laboratory Test Correlation Programme on CFR Engine (1981) Bustami Mustafa; E. Jasjfi
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.5.1.1168

Abstract

ASCOPE Work Programme for 1981 directed the Technical Committee to conduct the 2nd Annual Laboratory Test Correlation Programme for CFR Engines among petroleum laboratories in the ASCOPE member countries. Member countries taking part in this correlation programme are Indonesia with seven laboratories participating, Malaysia with two laboratories, Thailand and the Philippines with two laboratories each. LEMIGAS Laboratory of Indonesia, as coordinator in this correlation programme, provided the samples to be sent to each participating laboratory. After being tested by the participating laboratories, the test results on these samples were to be sent to PPTMGB "LEMIGAS" in Jakarta for processing, including the determination of the standard deviation. Based on these results, conclusions can be drawn about the deviations of laboratory test results and about outliers to be rejected. For proper analysis, the samples for correlation also require physical and chemical test such as specific gravity, RVP, distillation, and TEL content, in the receiving laboratories to take into account any possible changes in the sample properties which have occured during transportation and storage. abaot w bliy Also important to be observed are ambient and engire operating conditions during the men Jnlog lomt correlation tests. The results of this analysis can then be used as a base for diagnosis of the probable causes of deviations, the occurence of outliers and for recommendations of remedial steps to be taken. The method used for testing the samples is the Bracketing Procedure System, while for rounding the values of the numbers found during the tests the ASA rules for rounding are used. The Grubb's rejection criteria with the use of "T" factors are used in evaluating the possible outliers.
MICROBIAL CORROSION IN OIL INDUSTRY: A PRELIMINARY SURVEY OF THE PROBLEM NOEGROHO HADI HS
Scientific Contributions Oil and Gas Vol 5 No 2 (1982)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.5.2.1169

Abstract

In 1977 Warren Spring Laboratory was authorised by the Engineering Materials Require ments Board of the Department of Industry to carry out a limited survey on the extent and magnitude of microbial corrosion in British Industry. The need for the survey arose because, despite all the microbial corrosion work which has been carried out in the past and the protection techniques which have been developed, microbial corrosion incidents con- tinue to occur, often causing considerable financial loss to industry. A questionnaire which would enable as much information as possible on microbial corrosion to be obtained from a wide variety of firms and organisations conceined in the manufacture and use of metal equipment. Since microbial corrosion has been most com- monly encountered as a problem with buried ferrous metals, considerable work has been done to develop techniques for assessing soil aggressiveness, Several of the survey questions were therefore directed to determine whether the recommended techniques were being applied, how effective these techniques were and of further experimental work was required. The economics of microbial corrosion protection were another area for which infor- mation was sought since the ultimate aim of a soil aggressiveness assessment is to enable the degree of protection given to a buried structure to be directly related to the measured aggressiveness, Thus unnecessary protection would be avoided.

Page 46 of 62 | Total Record : 619

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