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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 5 Documents
 1 
Search results for , issue "Vol 39 No 1 (2016)" : 5 Documents clear
PERMO-TRIASSIC PALYNOLOGY OF THE WEST TIMOR Eko Budi Lelono; L. Nugrahaningsih; Dedi Kurniadi
Scientific Contributions Oil and Gas Vol 39 No 1 (2016)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.39.1.529

Abstract

Fifteen surface samples were examined to analyze palynology of the Permo-Triassic sediments of West Timor. The studied samples were collected from the clastic sediment of Bisane Formation which is considered to be the oldest formation. It derives from the Australian continent (Gondwana) following thecollision with the Banda volcanic arc. The Bisane Formation generally comprises thick calcareous sandstone (0.3-5 meters) with shale alternation and abundant marine microfossil of Chrinoid. The appearance of Chrinoid may indicate Permian age and shallow marine environment. Meanwhile, other Bisane sediment shows different lithology in which it is composed of the intercalation of non-calacreous, dark gray to black shale and siltstone showing papery structure and rich in sulphur. Generally, palynological assemblage of the studied samples characterises Permo-Triassic age as indicated by the existence of common striate-bisaccate pollen including Protohaploxypinus samoilovichii, P. fuscus, P. goraiensis, Striatopodocarpidites phaleratus, Pinuspollenites globosaccus and Lunatisporites pellucidus. However, the appearance of trilete-monosaccate spores of Plicatipollenites malabarensis and Cannanoropollis janakii within the non-calcareous shale samples de􀂿 nes the age as Permian or older for these samples. Interestingly, marine dino􀃀 agellates appear to mark calcareous samples suggesting the in􀃀 uence of a marine environment. They disappear from the non-calcareous samples indicating a freshwater environment. By integrating this palynological analysis and Permian tectonic event which is marked by rifting, it can be interpreted that the non-calcareous samples were formed during early syn-rift as evidenced by the occurrence of freshwater deposit (may be lacustrine). Subsequently, following sea level rises during post rift, the depositional environment shifted to shallow marine as indicated by the existence of calcareous Permo-Triassic samples. If this is the case, the appearance of Permo-Triassic sediments provides an opportunity to 􀂿 nd a new petroleum system in the Paleozoic series of West Timor. Source rock is represented by black shale, whereas reservoir is represented by thick sandstone.
THE DEGRADATION OF THE PROTECTIVE SCALE ON BINARY FeCr ALLOYS (Fe-2.25Cr, Fe-10Cr, Fe-18Cr AND Fe-25Cr) IN CO2 AND IN CO2 + H2O ENVIRONMENT AT 600oC Bagas Pujilaksono
Scientific Contributions Oil and Gas Vol 39 No 1 (2016)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.39.1.530

Abstract

The oxidation behaviour of the binary alloys Fe-2.25, Fe-10Cr, Fe-18Cr and Fe-25Cr in dry and wet O2 at 600oC is investigated by isothermal exposures of carefully polished samples for up to 168 hours. The oxidized samples are investigated gravimetrically and the oxides formed are studied by X-ray diffraction. X-ray photoelectron spectroscopy is used for depth pro􀂿 ling of the thin oxides. The scale surface is imaged by SEM. Cross sections through the scale are analyzed by SEM/EDX for imaging and for measuring the chemical composition. The oxidation behavior of the four FeCr alloys is intermediate between those of iron and chromium. Fe-2.25Cr oxidizes in a way similar to iron in both environments, forming a poorly protective scale consisting of FeCr spinel at the bottom, magnetite in the middle and a hematite cap layer. In dry O2, Fe-10Cr, Fe-18Cr and Fe-25Cr form a thin and protective (Fe,Cr)2O3 oxide similar to the chromia 􀂿 lm formed on pure chromium. In wet O2, Fe-10Cr, Fe-18Cr and Fe-25Cr initially form the same kind of protective oxide 􀂿 lm as in dry conditions. After an incubation time that depends on alloy chromium content, all three alloys go into breakaway oxidation and form thick, poorly protective scales similar to those formed on Fe-2.25Cr. Breakaway oxidation in wet O2 is triggered by the evaporation of CrO2(OH)2 from the protective (Fe,Cr)2O3 oxide.
FORMULATION OF LUBRICATING GREASE FOR AGRICULTURAL EQUIPMENT APPLICATION Ratu Ulfi
Scientific Contributions Oil and Gas Vol 39 No 1 (2016)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.39.1.531

Abstract

The formulation of environmentally friendly greases based on castor oil have been developed for agricultural equipment application. In order to improve base oil and tribological performances, several additives such as sterically hindered phenolic type antioxidants (AO), liquid mixture of amine phosphate as an extreme pressure (EP) and disodium sebacate as a corrosion inhibitor (CI) additive were added. The objective of this study is to develop a lubricating grease formula for agricultural equipment applications having high oxidation stability, good wear and corrosion protection, and excellence in terms of water resistance. The results of physical-chemical and performance examination show that the product developed has the following speci􀂿 cations: NLGI grade is 2, dropping point is at temperature of 192.5oC, unworked and worked penetrations are 255 mm/10 and 307 mm/10 respectively. The copper strip corrosion is 1a, and scar diameter is 0.57 mm. The physical-chemical characterics of the grease developed still meet speci􀂿 cations, especially for agricultural equipment application.
BIOREMEDIATION IN PETROLEUM CONTAMINATED SOIL TREATMENT USING PLANT-MICROORGANISMS COMBINATION (Case Study: Reduction Level of TPH and BTEX in Bioremediation Process) Cut Nanda Sari; Tyas Putri Sativa; Setyo Sarwanto Moersidik
Scientific Contributions Oil and Gas Vol 39 No 1 (2016)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.39.1.532

Abstract

Oil spills, in both aquatic and terrestrial environments, are very detrimental to people and the environment due to hydrocarbon compounds that are contained in oil which are not only be harmful for the balance of the ecosystem and the environment but also carcinogenic to humans and animals. Therefore remediation needs to be done. One of the methods is by using a combination of microorganisms and plants. The aim of this research is to analyze the in􀃀 uences between several different treatments that are applied for TPH and BTEX removal in the process of remediation. In this research, bioremediation was conducted by using four different treatments which are: by adding compost (C), plants and compost (P), microorganisms and compost (B), and compost, plants and microorganisms (BP), to soil with oil content of 5% and 10%. The following test results of TPH in soil contaminated with 5% oil content are: 2.10% (C); 1.31% (B); 1.66% (P); and 0.68% (BP). The TPH test results in soil contaminated with oil content of 10% are: 3.30% (C); 2.54 (B); 3.91% (P); and 3.31% (BP). The highest percentage of TPH degradation in contaminated soil of 5% oil content was found in BP treatment (87.1%), while in the contaminated soil of 10% oil content the largest TPH removal percentage is by the treatment of adding bacteria (B) which is 76.19%. BTEX removal percentage in 5% oil contaminated soil in BP treatment is 68.35% while in 10% oil contaminated soil with B treatment the removal percentage is 84.91%. Based on statistical tests, both on contaminated soil with 5% and 10% oil content, TPH degradation signi􀂿 cantly affects the pH value as p < 0.05 but TPH degradation does not affect temperature values as p > 0.05.
OPTIMIZATION OF PHENOLIC WASTES TREATMENT IN ARTIFICIAL PRODUCED WATER BY PSEUDOMONAS AERUGINOSA Syafrizal Syafrizal
Scientific Contributions Oil and Gas Vol 39 No 1 (2016)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.39.1.533

Abstract

The purpose of this research is to obtain the optimum condition of phenol biodegradation in arti􀂿 cially produced water using Pseudomonas aeruginosa. The screening of medium in the highest phenol degradation at 99.85% in medium M5, followed by M1, M4, M3, and M2, at 99.83%, 28.47%, 27.64%, and 0.09%, respectively, during the 24 hours incubation time. Medium M5 and M1 are relatively expensive if applied in the 􀂿 eld, thus optimization of incubation time, temperature, pH, and the adding of oil is needed in the treatment parameters affecting the phenol biodegradation process using an easy and cheap medium, M4. This research resulted in phenol biodegradation percentage at optimum condition for 2 days incubation, pH 7, and temperature 30°C, was 99.98%.The adding of oil at optimum condition: 100 mg/L could degrade phenol waste to 28.01%.

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