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110 items
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Uticaj utiskivanja gas-lift gasa na prenos mase i toplote
Branko Grubač (2019)Nakon uvođenja kontinualnog gas-lifta, primećen je porast proizvodnje tečnog naftnog gasa, TNG, u postrojenju za preradu gasa, kao jednog od finalnih proizvoda dobijenog iz fluida gaso kondenzatnih i rastvorenog gasa iz naftnih bušotina. Pretpostavljeno je da se prisustvom gas-lift gasa uspostavlja drugačija ravnoteža faza u odnosu na slučaj bez gaslifta, te da je gas-lift gas stripovao propan i butane iz tečne u parnu fazu, što je dovelo do povećanja prinosa TNG-a. Napravljen je model bušotine koja radi u kontinualnom gas-liftu ...... on paraffin deposition was investigated. The results of the research have shown that the precipitation of paraffins begins at greater depths and that the amount of deposit is higher in the gas-lift well. Key words: gas-lift, well modeling, mass and heat transfer, paraffin deposition Scientific ...
... ion of two-phase oil/water paraffin deposition, Society of Petroleum Engineers, SPE paper, str 49- 55, (2008) [93] D. Danilovic, V. Karovic-Maricic, R. Sokolovic-Secerov, D. Ivezic, M. Zivkovic, Laboratory testing and simulation of the paraffin deposition in Turija field oil well in Vojvodina ...
... Euchner, Methods for predicting wax precipitation and deposition, Society of Petroleum Engineers, SPE paper, str 121-126, (1988) [96] W. Ming, Q. Shujuan, L. Jianfeng, Z. Ling, Prediction model based on the theory for tackling wax deposition in oil pipelines, Journal of natural gas chemistry, Vol ...Branko Grubač. Uticaj utiskivanja gas-lift gasa na prenos mase i toplote, Beograd : Rudarsko-geološki fakultet, 2019
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Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)
Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović. "Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)" in Challenges : Sustainable Land Management – Climate Change, Advances in Geoecology 43, Catena Verlag GMBH (2014)
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Fluid inclusion systematics in the Okoška gora polymetallic deposit
... lcedony rhythmically bandedsinte: reported (Mihael Ravnjak, verbal comm.), howeverit is not clear whether they re breccia infill or paleosurface deposition. The mineralized stockworks contain таг quartz, often in the form of sceptre, and amethyst, which is slightly pleocbroic umi polarised light of the ...Aleš Šoster, Miloš Velojić, Barbara Potočnik Krajnc, Matej Dolenec. "Fluid inclusion systematics in the Okoška gora polymetallic deposit" in 25th meeting of Slovenian geologists, Ljubljana, 2021, Univerza v Ljubljani, Oddelek za geologijo (2021)
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Analiza primenjenih metoda za transport parafinske nafte
Dunja Milojević (2024)Sadržaj parafina u nafti ima dominantan uticaj na svojstva parafinskih nafti. Taloženje parafina, odnosno taloženje čvrstih čestica parafinskog voska, predstavlja ozbiljan globalni problem tokom proizvodnje i transporta sirove nafte. Samo taloženje voska zavisi od termodinamičkih faktora, poput temperature, pritiska i sastava nafte. Transport nafte cevovodima je uobičajeni proces transporta u naftnoj industriji. Kada prilikom cevovodnog transporta parafinske sirove nafte, dođe do prekida protoka i hlađenja nafte ispod temperature stinjavanja, parafini će kristalisati, pri čemu će doći do, geliranja celokupne transportovane ...... Economic Analysis of Oil and Gas Engineering Operations. New York: CRC Press. 2. Alnaimat, F., Ziauddin, M., & Mathew, B. (2019, November 27). Wax Deposition in Crude Oil Transport Lines and Wax Estimation Methods. IntechOpen Journal. 3. BeoControl Logistic. (n.d.). Transport nafte i gasa. Preuzeto ...
... domaćih grejnih kablova i razvoj specifičnog za primenu u naftnoj industriji. Tehnika - Klektrotehnika, 60, str. 606-610. 9. Doeble, K. (2018). Wax Deposition as a Function of Flow Regimes. Norway: Norwegian University of Science and Technology. 10.Elmabrouk Ali Elhaddad, E. (2014). NOV!I MODEL ZA ...
... PROIZVODNJE NA NAFTNOM POLJU AMAL. Beograd: Univerzitet u Beogradu, Rudarsko geološki fakultet. 11. Guozhong, Z., & Gang, L. (2010). Study on the wax deposition of waxy crude in pipelines and its application. Journa! of Petroleum Science and Engineering. 12.iStock. (n.d.). Oil pipeline images. Preuzeto ...Dunja Milojević. Analiza primenjenih metoda za transport parafinske nafte, 2024
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Палеомагнетски резултати из Тимочког магматског комплекса, Источна Србија
... erent types of Proterozoic to Lower Cretaceous rocks. The sedimentation continued through Upper Cretaceous from Lower Turronian and ended by deposition of reef sediments and conglomerates and sandstones in Upper Campanian‐ Maastrichtian. The volcanic activity in the area started in Upper Tu ...Весна Лесић, Емо Мартон, Драган Лукић, Весна Цветков. "Палеомагнетски резултати из Тимочког магматског комплекса, Источна Србија" in Knjiga apstrakata 17. Kongres geologa Srbije, Vrnjačka Banja 17-20. maj 2018., Српско геолошко друштво (2018)
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Novi pristup proučavanju tekstura minerala značajnih za istraživanje rudnih ležišta
Aleksandar Pačevski (2022)... pyrite was prevented, and the porous character of this mineral was emphasized, what underlines the specificity in the conditions of ore material deposition. Further examination of the Fe isotope composition of pyrite by LA-MC-ICP- MS, but on well-defined textural varieties such as colloform and cuhedral ...Aleksandar Pačevski. "Novi pristup proučavanju tekstura minerala značajnih za istraživanje rudnih ležišta" in 18. Kongres geologa Srbije “Geologija rešava probleme” Divčibare, 01-04 jun 2022., Beograd : Srpsko geološko društvo (2022)
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Properties of fly ash and slag from the power plants
This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method... and physical properties that are dependent on the natural composition, quality of coal from basin, the manner of com- bustion and place of ash deposition. Article history: Manuscript received March 24, 2016 Revised manuscript accepted July 19, 2016 Available online October 20, 2016 Keywords: ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Properties of fly ash and slag from the power plants" in Geologia Croatica, Zagreb : Croatian Geological Survey (2016). https://doi.org/10.4154/gc.2016.26
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Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)
Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD... Pb-Zn-{+Cu,Ag,„Au,Sb,Bi,W) miner- alisations from the Šumadija–Kopaonik ore district, Serbia (Figure 1a,b), with different post-magmatic processes of deposition, mineral associations, crystallisation temperature, and chemical composition. Arsenopyrite is often present in the ores of this district and is ...
... different types of mineralisations in the Šumadija– Kopaonik ore area, no correlation was established regarding, its composition and different deposition conditions, i.e., different mineral paragenesis. - The average unit cell parameters measured by XRPD of near-stoichiometric arsenopy- rite from ...Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik. "Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)" in Crystals, MDPI AG (2023). https://doi.org/10.3390/cryst13020278
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Geochemical evaluation of dolostone deposits in Montenegro: Implications for potential industrial applications
Darko Bozovic, Vladimir Simic, Dragan Radulovic, Slobodan Radusinovic, Vesna Matovic, Anja Terzic (2024)This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...примарне сировине, минералогија, физичко-механичка својства, технолошка својства, наука о материјалимаDarko Bozovic, Vladimir Simic, Dragan Radulovic, Slobodan Radusinovic, Vesna Matovic, Anja Terzic. "Geochemical evaluation of dolostone deposits in Montenegro: Implications for potential industrial applications" in Science of Sintering, Bor, August 2024, National Library of Serbia (2024). https://doi.org/10.2298/SOS240701029B
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Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material
Borislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić (2022)Pyrophyllite, with the chemical formula Al2Si4O10(OH)2, is a naturally occurring and abundant van der Waals mineral belonging to the group of phyllosilicates. It is very soft, layered crystal used for sculpting and an excellent electrical and thermal insulator aimed for the operation at high pressure and temperature. Here, for the first time, two-dimensional (2D) pyrophyllite obtained by both mechanical and liquid phase exfoliation is presented and investigated at the nanoscale. The layered structure provides low friction coefficient of around ...Atomic force microscopy, Insulating properties, Nanofriction and wear, Natural two dimensional materials, Phyllosilicates, PyrophylliteBorislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić. "Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material" in Applied Surface Science, Elsevier BV (2022). https://doi.org/10.1016/j.apsusc.2022.155114
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New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"
Saša Ivanišević, Dejan Radivojević (2018)геофизички каротаж, депозиционе средине, лежишта угљоводоника, миоцен, пост‐ рифтнo, секвенциона стратиграфија... evel of depositional energy. Cylindrical shape of the GR log occurs against sand layers deposited in the environment where the relative deposition level has not changed, while the sediment yield has been considerable. RESULTS Since the extension of the Pannonian Basin did not ...Saša Ivanišević, Dejan Radivojević. "New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"" in 17th Serbian Geological Congress, Vrnjačka Banja, 17-20 maj 2018, Srpsko geološko društvo (2018)
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Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)
This paper presents the first data on the organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in the East Herzegovina region of the External Dinarides. Representative, organic-rich samples from outcropping sedimentary rocks of different ages in the area (Triassic to Neogene) were selected and analysed. The organic matter was studied by Rock-Eval pyrolysis and under the microscope in reflected non-polarized light and incident blue light. The results obtained show the presence of different types of organic ...... the end of the Late Cretaceous, which was due to the collisional processes and upli� of the Dinarides (Van Unen et al., 2019). �is led to the deposition of tectonically controlled turbidites near Nevesinje (Eocene carbonates and siliciclastics similar to the Promina Beds; Vlahović et al., 2012; ...
... while carbonate sedimentation continued only sporadically. �e youngest sediments in East Herzegovina belong to the in- tramountain system of lake deposition during Neogene times (i.e., in the Gacko Basin; Fig. 1C; Mandić et al., 2011). MATERIALS AND METHODS Samples Twenty representative outcrop samples ...
... at the end of the Late Cretaceous, which was due to the collisional processes and uplift of the Dinarides (Van Unen et al., 2019). This led to the deposition of tectonically controlled turbidites near Nevesinje (Eocene carbonates and siliciclastics similar to the Promina Beds; Vlahovic¢ et al., 2012; ...Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić. "Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)" in Annales Societatis Geologorum Poloniae (2021). https://doi.org/10.14241/asgp.2021.16
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Actual contamination of the Danube and Sava rivers at Belgrade (2013)
Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening... pollutants are emitted into rivers by for example runoffs and leaching from agricultural fields, direct discharge of waste water, by atmospheric deposition and shipping activities. In more detail, the contamination is caused by heavy metals, nutrients and many low-molecular weight organic compounds ...
... providing foodstuff for living organisms. They also serve as a sink and reservoir for a variety of environmental contaminants in accumulation or deposition areas. It has been recognized that aquatic sediments accumulate persistent and toxic chemicals.11 In the past years, tremendous efforts have been ...Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer. "Actual contamination of the Danube and Sava rivers at Belgrade (2013)" in Journal of the Serbian Chemical Society, National Library of Serbia (2014). https://doi.org/10.2298/JSC131105014A
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Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world
Bogoljub Vučković, Bojan Dimitrijević (2023)The Kostolac-Kovin coal basin with an area of 320 km2, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In this paper, we deal with the geochemical characteristics of coal seams and perform a comparative analysis of coal affectation on the environment. With ...... starting from the surface of the terrain to those in the deepest levels. This speaks in favor of the fact that the geochemical conditions during deposition, and subsequently diagenesis of coal, were different for coal compared to sediments. That is, the plant matter that formed the coal layers did ...Bogoljub Vučković, Bojan Dimitrijević. "Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world" in 9th International Conference Mining and Environmental Protection, 24–27. May 2023, Sokobanja, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet (2023)
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Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas
During construction of buildings in urban areas, sometimes there is a need to blast solid rock mass in the immediate vicinity of the surrounding buildings. In that case, the aim is not only to increase the efficiency of blasting, but also to reduce harmful effects of ground vibration induced by blasting. At the same time, it is very important to protect the buildings located in the safe zone from the blast site as well as remaining rock mass around ...Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović. "Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas" in 31st International Conference Ecological Truth & Environmental Research-EcoTER'24, Sokobanja, 18-21. jun 2024, Bor : Tehnički fakultet u Boru (2024)
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Callovian (Middle Jurassic) Sphriganaria (Brachiopoda) from the Jordan Valley (Middle East)
Howard R. Feldman, Barbara V. Radulović, Fayez Ahmad. "Callovian (Middle Jurassic) Sphriganaria (Brachiopoda) from the Jordan Valley (Middle East)" in Historical Biology (2023). https://doi.org/10.1080/08912963.2022.2122823
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Crystal structure of K3EuSi2O7
alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu... SUPPLEMENTARY MATERIAL The crystallographic data for this paper have been deposited with the Cam- bridge Crystallographic Data Centre under deposition number CCDC 2062974. Acknowledgements: The authors gratefully acknowledge financial support from the Ministry of Education, Science and Tec ...Sabina Kovač, Predrag Dabić, Aleksandar Kremenović. "Crystal structure of K3EuSi2O7" in Journal of the Serbian Chemical Society, National Library of Serbia (2021). https://doi.org/10.2298/JSC210218026K
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Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides
Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2022)oroklini, raspodela deformacija, transkurentna kretanja, Karpato-balkanidi, Cirkum-mezijski rasedni sistem... Vir, Sokobanja and Svrljig, Figs. 2 and 3g) were formed during a middle Miocene period of orogen-parallel extension, controlling their lacustrine deposition (Fig. 2; Krstekanić et al., 2020). 3. Methodology 3.1. The structural mapping approach We have performed a field structural and kinematic ...
... Fault is generally transtensive, documented by obli- que dextral-normal faults (S2, S5, S7, S8, Figs. 6 and 7e). The SZF bounds and controls the deposition in NNW-SSE oriented corridors filled with middle Miocene sediments (S2–7, Fig. 6), while truncating the Eocene deposits in the similarly oriented ...
... sediments of the Babušnica Basin (Figs. 3e, 6 and 7e). Transtensive kinematics along the fault created along-strike accommo- dation space for the deposition of early middle Miocene sediments in a narrow corridor along its strike (Figs. 3c, d, and 5). Based on map-scale observations of dextral dragging ...Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga. "Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides" in Global and Planetary Change, Elsevier BV (2022). https://doi.org/10.1016/j.gloplacha.2021.103714
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Analysis of the exhaust emissions inventory from auxiliary mining machines
Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović (2023)Open-pit coal mines are equipped with a large number of mining machines and vehicles with diesel engines. Due to common daily operation of these machines and vehicles large amounts of exhaust gases which contain numerous pollutants are emitted into the atmosphere. The demand to reduce air pollution induced the activities in developed countries to map and calculate all gases emitted by industries to formulate and select adequate preventive activities. In collaboration with machine manufacturers, emission standards for off-road machines ...Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović. "Analysis of the exhaust emissions inventory from auxiliary mining machines" in 9th International Conference Mining and Environmental Protection, University of Belgrade, Faculty of Mining and Geology (2023)
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Geochemical characterization of sediments from the archaeological site Vinča – Belo Brdo, Serbia
Gorica Veselinović, Dragana Životić, Kristina Penezić, Milica Kašanin-Grubin, Nevenka Mijatović, Jovana Malbašić, Aleksandra Šajnović (2020)Gorica Veselinović, Dragana Životić, Kristina Penezić, Milica Kašanin-Grubin, Nevenka Mijatović, Jovana Malbašić, Aleksandra Šajnović. "Geochemical characterization of sediments from the archaeological site Vinča – Belo Brdo, Serbia" in CATENA, Elsevier BV (2020). https://doi.org/10.1016/j.catena.2020.104914