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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 38 No 2 (2015)" : 5 Documents clear
THE INFLUENCE OF FUNGI CONTAMINATION ON THE AVIATION FUEL AND BIOCIDE INHIBITOR Mochammad Fierdaus; Yannie Kussuryani
Scientific Contributions Oil and Gas Vol 38 No 2 (2015)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.38.2.540

Abstract

Aviation fuel is one of the fractions of fuel oil containing hydrocarbons and trace materials in the form of organic salts. Distribution of aviation fuel to the aircraft allows the aviation fuel contaminated by water due to condensation. The presence of water, hydrocarbons and organic compounds are appropriate conditions for microbial growth. The growth of microbes among other fungi generates biomass that sould can be able block fi lter between fuel tank in aircraft to the engine and have fatal consequences for flight operation. An efforts to prevent the growth of fungi is to add biocides in aviation fuel, which is in this study using formalin. Fungi was used in this experiments consists of four species which were dominant in the aviation fuel that are: Paecilomyces sp.1, Paecilomyces sp.2, Aspergillus sp., Scytalidium sp., as will as a the of mixed cultures of four species of fungus. The concentration of formalin is used as biocide were 150 ppm, 250 ppm and 500 ppm. Parameter measured are dry weight of fungi and physical characteristic of aviation fuel including specific gravity, smoke point, freezing point, copper strip corrosion and flash point. Experiment result showed that the addition of formalin could prevent the growth of fungi in aviation fuel. For Paecilomyces sp.1 and Paecilomyces sp.2, formalin concentration of 150 ppm can prevent fungi growth in aviation fuel signifi cantly. It takes 500 ppm for Aspergillus sp. and 250 ppm for Scytalidium sp. The concentration of formalin 250 ppm and 500 ppm were inhibit the growth of mixed culture. Analysis of the physical properties of aviation fuel, showed that the use of formalin does not affect the quality of aviation fuel in all parameters tested and they meet the quality standards of aviation fuel issued by Ministry of Defence. This means that formalin can be used as biocide for aviation fuel.
BIODEGRADATION ENHANCEMENT OF OILY WASTEWATER BY OZONATION METHOD Syafrizal Syafrizal; Zulkifliani Zulkifliani; Fami Adetyas Maulana Pratama; Setijo Bismo
Scientific Contributions Oil and Gas Vol 38 No 2 (2015)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.38.2.541

Abstract

This research is aimed at improving the ability of oily wastewater biodegradation through the ozonation method, where ozone will oxidize organic compounds in the oily wastewater that are diffi cult to be degraded by bacteria so that the structure becomes simpler. The ozonation process is done by using a corona-discharge ozonator and semi-batch reactor, and the process is varied by ozone dose and pH value. The ozonation process is then followed by a biodegradation process, where the bacteria that is used is Pseudomonas sp. This study also observed the effect of surfactants in supporting the biodegradation processes. An indicator of research success is the increase in the biodegradation percentage of the sample, followed by an increase in the value of the constant rate of bacterial growth. The research results shows that the ozonation method and the use of surfactant can support the oily wastewater biodegradation process. This is shown by the value of the biodegradation percentage and the constant rate of bacterial growth results, in which respective values are able to reach 86,787% and 0,339 at the optimal operating conditions (ozone dose of 0.53 g/h; pH 7; Bios-H surfactant concentration 500 ppm).
THE INFLUENCE OF MOLYBDENUM DISULPHIDE-FRICTION MODIFIER (FM) ADDITIVE INCREMENT ON THE FRICTION AND WEAR PREVENTION BEHAVIOUR OF HVI 60 BASE OIL Muhammad Hanifuddin; Nofrijon Sofyan
Scientific Contributions Oil and Gas Vol 38 No 2 (2015)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.38.2.542

Abstract

Friction will always be found in a mechanical system. It is therefore necessary to minimize friction, so it becomes a more effi cient use of energy. This paper discusses the infl uence of MoS2 friction modifier (FM) additive in the form of powder with two different mesh sizes, i.e. 90 nm and 1.5 um, on the friction and wear characteristic of HVI 60 base oil. The variation of MoS2 were 0,05%; 0,1%; 0,5% weight whereas MoS2 1.5 um were 0,05%; 0,1%; 0,5%; 1% and 2% weight. MoS2 additive 90 nm was mixed with base oil and stirred with magnetic stirrer for 60 minutes at 50oC and homogenized in an ultrasonic homogenizer for 1 hour. For the MoS2 1.5 um, the additive was mixed with base oil and stirred with magnetic stirrer for 60 minutes at 75oC without using an ultrasonic homogenizer. Friction and wear characteristics of these mixtures were tested using four-ball and SRV test-rig. The wear scars were analyzed by using a scanning electron microscope (SEM). The results of the tests showed that the addition of 0.1% weight MoS2 additive, both in 90 nm and 1.5 um, resulted in an optimum increase in friction and wear characteristic of 23% and 11%, respectively. Observation on the wear scar showed that adhesive and abrasive wear mechanisms were involved in the wear process. The results of this research could be applied in the production of lubricating oils that can improve engine performance. Keywords: additive, friction, wear, molybdenum disulfi de, four-ball
PEPTIDE SURFACTANT FOR EOR APPLICATION Usman Usman
Scientific Contributions Oil and Gas Vol 38 No 2 (2015)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.38.2.543

Abstract

Motivated by recent advances on the peptides surfactants that capable of forming emulsion stabilization by lowering the interfacial tension, an extensive set of tests were carried out to further investigate the applicability of peptide molecules for enhanced oil recovery application. A designed peptide surfactant using protein biotechnology approach was laboratory tested at three samples representing the different oil characteristics, water formation, and reservoir rock. The best performance of peptide surfactant obtained is of sample A. Peptide surfactant is able to form microemulsion Type III at pH 11. It can lower the interfacial tension value until the range of 10-2 dyne/cm at 25°C, even though itsn’t reached the desired target yet which is 10-3 dyne/cm or even less. It can also change rock wettability from water wet into strong water wet. Sample A has relatively short hydrocarbon chain compared to samples B and C, it is classifi ed as intermediate oil, medium salinity for water formation, and rock mineral is dominated with quartz without gypsum that is very harmful to the fuction of surfactant. The developed peptide surfactant hasn’t been stable at high temperature yet. When tested at 70°C, the interfacial tension value increase to around 10-1 dyne/cm. Displacement effi ciency using oil sample A is less than 1%. Based on these results, the next peptide surfactant design will be focused on resistance capability improvement to temperature and peptide amino acid structure position to produce the better result of surfactant. The performance test results of peptide surfactant presented in this paper is valuable in designing specifi c peptide surfactant for certain oil fi eld.
HYDRATE MITIGATION FOR DEEP WATER AND LONG DISTANCE PIPELINE – FLOW ASSURANCE APPROACH Riesto Mundi Karono
Scientific Contributions Oil and Gas Vol 38 No 2 (2015)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.38.2.544

Abstract

The existence of gas hydrates is well known in the oil and gas production industry. The components are dominated by methane and naturally occur in deep marine sediment along continental margins. Although hydrates may be of potential benefi t both as a hydrocarbon resource and as a mean of storing and transmitting natural gas, traditionally their presence is considered to be an operational and a safety problem. They can form at the pressures and temperatures found in natural gas and oil pipelines causing blockages, especially when temperature falls signifi cantly, such as when closing in a well or fl owing gas through a choke. This could deliver a serious potential problem for oil and gas offshore production either for its equipment or personnel. Besides the variation of gas rate to avoid hydrates forming, currently there are two methods that have been used widely to prevent hydrates formation in production pipelines - thermal insulation and chemical inhibitor. Each method has its own benefits. PIPESIM software application can be used to evaluate both mitigation methods and to then fi nd which is the best scenario based on lowest cost, shortest period of application and less adversity.

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