cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Wulandari
Contact Email
jurnal.lemigas@esdm.go.id
Phone
+6221-7394422
Journal Mail Official
jurnal.lemigas@esdm.go.id
Editorial Address
Jl. Ciledug Raya Kav. 109, Cipulir, Kebayoran Lama, Jakarta Selatan 12230
Location
Kota adm. jakarta selatan,
Dki jakarta
INDONESIA
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
 43   44   45   46   47 
WA INFLUENCE OF HYDROCARBON COMPOSITIONS OF THE HYDROCRACKING FEEDSTOCKS ON THE HYDROCRACKED PRODUCTS OF LUBRICANT BASE STOCK AND MIDDLE DISTILLATE A.S. Nasution
Scientific Contributions Oil and Gas Vol 10 No 3 (1987)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.10.3.1150

Abstract

An experiment has been carried out to study to influence of hydrocarbon composition of the hydrocracking feedstocks on the hydrocracked products of lubricant base stock and middle distillate with bi-functional catalyst.  The operating conditions are;  temperature: from 400° to 420°C pressure: from 100 kg/cm2 and H2/HC ratio: 1000 Ilt/lt using a Catatest unit, operated with a continuous system.  Experimental data show that the high content of paraffin hydrocarbon in the hydrocracked feedstock tends to increase the viscosity index of lubricant base stock, smoke point of kerosene and diesel index of gas oil products.
ATTENUATION ANALYSIS OF VSP DATA Suprajitno Munadi
Scientific Contributions Oil and Gas Vol 10 No 2 (1987)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.10.2.1151

Abstract

Attenuation is usually defined to include all types of frequency selective process wich contribute to the am- plitude decay of propagating waves. It depends on porosity of rock, grain size, over pressure zones and fluid saturation. Attenuation can at least double the information obtained from velocities alone.            The measurement of attenuation from a Vertical Seismic Profiles (VSP) has been carried out using two dif- ferent methods ie. the Spectral Magnitude Decay Method and the Pulse Broadening Method. The Spectral Magni- tude Decay Method is executed in the frequency domaiün, while the Pulse Broadening Method is entirely executed in the time domain.            Both methods have been tested using two shallow, high resolution VSP data. The deduced quality factor Q. obtained from the Spectral Magnitude Decay Method is slightly lower than those obtained from the Pulse Broadening Method. Thèse discTepancies can be attributed to reflection/transmission loses at layer boundaries which are lumped together with absorption in the frequency domain estimates.
THE EFFECTS OF FUSEL OIL BLENDING ON GASOLINE FUEL CHARACTERISTICS E. Jasjfi
Scientific Contributions Oil and Gas Vol 10 No 2 (1987)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.10.2.1152

Abstract

Fusel oil, which comprises a mixture of kigher alcohols, has prospective potentialirien for use at a conobrent in gasoline-methanol blends since ir can improve their water tolerance, Thie has been demonatrated in an earlier work by the author.            The present paper presents the reults of a serier of tests made to investigate the effects of funel oil addition to the actual gasoline fuel characterisies The resules indicated that such addition Could remult in improving the gsoline propertles s can be exemined through comparisom with the established specifications.
SURVEYS AND OIL POLLUTION IN THE ASEAN COUNTERIES Jaspar Billal
Scientific Contributions Oil and Gas Vol 10 No 2 (1987)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.10.2.1153

Abstract

The Sourheast Aslan Seas it a region having valuable and vulneruble marine and coattul resources and sinuated along denaely shipping router and oil uctiviries.            The concerm of the coastal countries in the repion on marine oil pollution has been pointed out in uriout regional meetings.            Many researchen and their institution started to look on the level of the contaminarion The author tummartzer and compare all information available and expose the g of knowledge on the extent of oil contamination tn the region.            A Regional Cooperation for the asseument and enaluarion af ol polhution it needed and being exrablished to ennure and obtain a compatible data and meaningful regional innerpretarion, 
OIL POLLUTION ABATEMENT Wahyudi Wisaksono
Scientific Contributions Oil and Gas Vol 10 No 1 (1987)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.10.1.1154

Abstract

To minimize the posibilities of oil pollution, preventive as well as represive action should be consider ed and eventually carried out simultaneousty. Preventive measures are considered in this case for offshore operations. Several repressive methods as well as clean up methods for oil-on-the waters are reviewed. Parameters partinent to the location of the spill related to the methods to be applied should be seriously consi dered.
CARBON DIOXIDE ADSORPTION CAPACITY OF INDONEIAN NATURAL ZEOLITE E. Jasjfi; Edi Janis
Scientific Contributions Oil and Gas Vol 10 No 1 (1987)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.10.1.1155

Abstract

Natural gas is an important commodity for the economy and development of Indonesia. In addition to its riches in petroleum resources, Indonesia is also endowed with other mineral resources, among which is na- tural zeolite.             This paper describes a study made to combine these two resources, the use of zeolite in natural gas processing, specifically for CO, removal by zeolite as solid adsorbent.            The experimental results presented in this paper indicate that this Indonesian natural zeolite has good CO, adsorp tion capacity, although the value is only about one half of that obtained from systhetic zeolite. Both zeolites were shown to follow the Langmuir adsorption iso therms and their parameters were established. These and other relevant data are presented in this paper.
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)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.10.1.1156

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. 
GASOLINE SPECIFICATIONS IN THE ASEAN COUNTRIES E. Jasjfi
Scientific Contributions Oil and Gas Vol 9 No 1 (1986)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.9.1.1157

Abstract

Gasoline is one of the most important petroleum products which is directly used by a large section of the general public. Countries of the Southeast Asia have been cooperating closely in many fields, including the petroleum industry.             In view of the facts, it would be of prime interest to examine and compare the gasoline specifications in the ASEAN countries.             This paper presents the results of the study, based on the official standard specifications in force in five ASEAN countries. The similarities and differences are emphasized, as well as their significance.  
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)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.9.1.1158

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.
THE 4th ASCOPE LABORATORY TEST CORRELATION PROGRAMME FOR FUELS BY SAMPLE CODES : A.2/X/82, D.2/Y/82 Subardjo Pangarso
Scientific Contributions Oil and Gas Vol 9 No 1 (1986)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.9.1.1159

Abstract

The properties of commercial products are measured by standardized laboratory test methods to check their Conformance to specification            Two or more measurements of some property of a specific sample by any given test method usually will not givee precisely the same answer.             Therefore, Laboratory test correlation of the specific sample is necessary to be done on the expected precision, accuracy of the test results and the uniformity of interpretative, to step on the credibility of the testing Laboratory.             This is a paper on the conduct and the results of the fourth ASCOPE (ASEAN Council on Petroleum) Cor mellation Programme for fuels were carried out on two kinds of samples.

Page 45 of 62 | Total Record : 619

 43   44   45   46   47 

Filter by Year

1982 2026


Reset
Filter By Issues
All Issue Vol 49 No 1 (2026) Vol 48 No 4 (2025) Vol 48 No 3 (2025) Vol 48 No 2 (2025) Vol 48 No 1 (2025) Vol 47 No 3 (2024) Vol 47 No 2 (2024) Vol 47 No 1 (2024) Vol 46 No 3 (2023) Vol 46 No 2 (2023) Vol 46 No 1 (2023) Vol 45 No 3 (2022) Vol 45 No 2 (2022) Vol 45 No 1 (2022) Vol 44 No 3 (2021) Vol 44 No 2 (2021) Vol 44 No 1 (2021) Vol 43 No 3 (2020) Vol 43 No 2 (2020) Vol 43 No 1 (2020) Vol 42 No 3 (2019) Vol 42 No 2 (2019) Vol 42 No 1 (2019) Vol 41 No 3 (2018) Vol 41 No 2 (2018) Vol 41 No 1 (2018) Vol 40 No 3 (2017) Vol 40 No 2 (2017) Vol 40 No 1 (2017) Vol 39 No 3 (2016) Vol 39 No 2 (2016) Vol 39 No 1 (2016) Vol 38 No 3 (2015) Vol 38 No 2 (2015) Vol 38 No 1 (2015) Vol 37 No 3 (2014) Vol 37 No 2 (2014) Vol 37 No 1 (2014) Vol 36 No 3 (2013) Vol 36 No 2 (2013) Vol 36 No 1 (2013) Vol 35 No 3 (2012) Vol 35 No 2 (2012) Vol 35 No 1 (2012) Vol 34 No 3 (2011) Vol 34 No 2 (2011) Vol 34 No 1 (2011) Vol 33 No 3 (2010) Vol 33 No 2 (2010) Vol 33 No 1 (2010) Vol 32 No 3 (2009) Vol 32 No 2 (2009) Vol 32 No 1 (2009) Vol 31 No 3 (2008) Vol 31 No 2 (2008) Vol 31 No 1 (2008) Vol 30 No 3 (2007) Vol 30 No 2 (2007) Vol 30 No 1 (2007) Vol 29 No 3 (2006) Vol 29 No 2 (2006) Vol 29 No 1 (2006) Vol 28 No 3 (2005) Vol 28 No 2 (2005) Vol 28 No 1 (2005) Vol 27 No 3 (2004) Vol 27 No 2 (2004) Vol 27 No 1 (2004) Vol 26 No 2 (2003) Vol 26 No 1 (2003) Vol 25 No 3 (2002) Vol 25 No 2 (2002) Vol 25 No 1 (2002) Vol 24 No 2 (2001) Vol 24 No 1 (2001) Vol 23 No 3 (2000) Vol 23 No 2 (2000) Vol 23 No 1 (2000) Vol 22 No 2 (1999) Vol 22 No 1 (1999) Vol 21 No 2 (1998) Vol 21 No 1 (1998) Vol 18 No 2 (1995) Vol 18 No 1 (1995) Vol 17 No 1 (1994) Vol 16 No 1 (1993) Vol 15 No 1 (1992) Vol 14 No 2 (1991) Vol 14 No 1 (1991) Vol 13 No 1 (1990) Vol 12 No 1 (1989) Vol 11 No 1 (1988) Vol 10 No 3 (1987) Vol 10 No 2 (1987) Vol 10 No 1 (1987) Vol 9 No 1 (1986) Vol 8 No 2 (1985) Vol 8 No 1 (1985) Vol 7 No 2 (1984) Vol 7 No 1 (1984) Vol 6 No 1 (1983) Vol 5 No 2 (1982) Vol 5 No 1 (1982) More Issue