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Упит dcterms_subject_txt:Gas Hydrate Formation

344 items

  • Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints

    Emő Márton, Vesna Cvetkov, Miodrag Banješević, Gábor Imre, Aleksandar Pačevski (2024)
    Apuseni-Banat-Timok-Srednogorie belt, danubicum, paleomagnetism, oroclinal bending

  • Geochemical study of U, Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area

    Jovan Kovačević, Maja Todorović, Marina Ćuk, Petar Papić (2016)
    jurski sedimenti, uran, torijum, elementi retkih zemalja, podzemna voda, istočna Srbija

  • Strain partitioning along a curved strike-slip fault system during indentation: inferences from analogue modelling

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)

  • Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains

    Renata Jach, Nevenka Đerić, Špela Goričan, Daniela Reháková (2014)
    carbon and oxygen isotopes, radiolarians, calcareous dinoflagellates, radiolarites, Krížna Nappe, West ern Carpathians, Tethys
    ... Sokolica Radiolarite Formation and Czajakowa Radiolarite Formation and proposed the Ždiar Formation as a new unit, comprising. thce entire radiolarite succession. In this study, the formal lithostratigrahy by Lefeld ef al. (1985) is used, with the exception of the Jasenina Formation. PREVIOUS RESEARCH ...
    ... hed: the Soltysia MarIstone Formation, com- prising the Čomy Limestone Member (spotted limestones with marls) and the Broniarski Limestone Member (cherty limestones); the Niedzica Limestone Formation (grey nodu- lar limestones); the Sokolica Radiolarite Formation (spotted and green radiolarites); ...
    ... (variegated and red radiolarites); the Czorsztyn Lime- stone Formation (red nodular limestones); and the Pieniny Limestone Formation (platy limestones). The last men- tioned limestones were assigned to a new formal unit, the Jasenina Formation (Michalik ef a/., 1990; Grabowski and Pszczotkowski, 2006) ...

  • Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)

    Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić (2021)
    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 ...
    nafta i gas, Rock-Eval, refleksija vitrinita, maceral, termička zrelost
    ... history of sedi- mentary basins, maturation indices, and kinetics of oil and gas generation. AAPG Bulletin, 71: 1445–1466. Tissot, B. P. & Welte, D. H., 1978. Petroleum Formation and Occurrence: A New Approach to Oil and Gas Exploration. Springer-Verlag, Berlin, 538 pp. Van Gijzel, P., 1981. Char ...
    ... history of sedi- mentary basins, maturation indices, and kinetics of oil and gas generation. AAPG Bulletin, 71: 1445-1466. Tissot, B. PR & Welte, D. H., 1978. Petroleum Formation and Occurrence: A New Approach to Oil and Gas Exploration. Springer-Verlag, Berlin, 538 pp. Van Gijzel, P., 1981. Charac ...
    ... and dolomites (Velaj, 2011; Pri�i and Muska, 2013; Cazzini et al., 2015). Strong tectonic deformation from Oligocene to Pleistocene led to the formation of structural traps, such as anticlinal belts in Albania: Berati, Kurveleshi and Cika (Velaj, 2011; Cazzini et al., 2015). Petroleum deposits in ...

  • Rift sequence stratigraphy and its contribution to source rock understanding – Serbian part of Pannonian Basin

    Filip Anđelković, Dejan Radivojević (2018)
    ... Tertiary, while the Lower Pontian shales were found to contain only gas-prone source rocks (Kostić, 2012). Since the Sarmatian sediments are mostly missing or have very restricted thickness in depressions close to the biggest oil and gas fields in Serbia (Ivanišević and Radivojević, 2018; Radivojević ...
    ... and Rundić, 2016) one can conclude that the main source rock is of Pannonian age. Those rocks correspond to the Endrőd formation hemipelagic marls, one of the source rocks at the largest hydrocarbon field in Hungary – Algyő field (Magyar et al., 2006). The marly limestones and limy marls of Lower ...
    ... (Eds). The Carpathians and their foreland: geology and hydrocarbon resources, AAPG Memoir 84, 619–632. Matenco, L. Radivojević, D. 2012. On the formation and evolution of the Pannonian Basin: Constraints derived from the structure of the junction area between the Carpathians and Dinarides. Tectonics ...

  • Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

    Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)
    MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii
    ... broth color change Microorganisms 2021, 9, 1691 4 of 20 (UBC), addition of CaCl2 in inoculated Urea broth (UBCA), CaCO3 formation on/in Urea- CaCl2 medium (MUC), and CaCO3 formation on/in YE-CaCl2 medium (MEC) present the normalized values of experimentally obtained variables, obtained using Equation ...
    ... mediate crystal formation as the center of nucleation, the number of viable and achievable bacterial cells did not determine in this experimental step. Furthermore, it can be noticed the impact of rapid and effective Urea hydrolysis in the first 72 h since the most intensive formation of precipitates ...
    ... soils, freshwaters found in lakes, reservoirs, ponds, rivers, streams, wetlands, and even groundwater and saline habitats has been related to the formation of different minerals around living cells under varied environmental conditions. Due to this fact, these bacteria represent resourceful bioagents ...

  • 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
    ... l details are collected in the Supplementary Information File). The published results on the formation of surface oxides based on Auger depth profiling suggest, upon 30 min air exposure, the formation of a total 5 nm thick surface structure composed of three layers, starting, with the top ~2 ...
    ... high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer formation upon air exposure. Our findings present the fundamental work on the prototype arsenopyrite structure and have further implications for studies ...
    ... FeOOH, followed by FexAsyO and Fei-x„.,AsnyS [23], which does not coincide with our observations. A longer oxidation of 25 days resulted in the formation of a thicker layer, starting, with 9 nm of oxygen and As-rich zone low in Fe and S, followed by 13 nm of an oxygen-deficient zone with a composition ...

  • 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 ...
    gas-lift, modelovanje bušotine, prenos mase i toplote, taloženje parafina
    ... sa okolinom, količina gas-lift gasa koji se utiskuje, sastav gas-lift gasa, kao i pritisak i temperatura gas- lift gasa. Pri modelovanju bušotine koja radi u kontinualnom gas-liftu uključeni su:  Tubing i kezing,  Fluid proizveden iz bušotine,  Gas-lift gas,  Razmena toplote fluida ...
    ... parnoj fazi, koja sadrži gas-lift gas, niži nego u fluidu bez gas-lift gasa, osim metana. Objašnjenje leži u činjenici da gas-lift gas sadrži više metana od ležišnog fluida – gasa. Promena u sadržaju etana je mala, jer je sadržaj etana u ležišnom fluidu i gas-lift gasu veoma sličan. Najveće razlike ...
    ... B - Proizvedeni fluid i gas-lift gas, za različitu vrstu gas-lift gasa, pritisak separacije 5,5 bar i tri različite temperature Tabela B1 - Sastav proizvedenog fluida sa CO2 kao gas-lift gasom bušotina B-1, 5.5bar i 10°C, Komponenta Proizvedeni fluid + gas-lift gas (kg/h) Parna faza Tečna ...

  • Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers

    Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović (2024)
    This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...
    korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd
    ... content on the formation of the gravelly material samples subjected to CBR,, testing, it was observed that CBR,, reached the highest value when the samples were compacted with water content close to w„„. Additionally, it was observed that, when the water con- tent for dry sample formation increased ...
    ... increased, CBRy „ decreased to 2.0% of the water content for formation, and then increased again as the water content increased from 2.0% to approximately 9.7% (SP) or 8.8% (MP), approaching w„ . Increasing the water content for formation above w„„ resulted in a decreasing trend for the measured CBR,„, ...
    ... water content for the formation of CBR, , was successfully predicted using polynomial functions: CBR, (SP)=-0.2216w* +3.8763w" —12.611w+28.471, R* =0.9581, (5) CBR,, (MP)=-0.1547w* +2.5276w" —7.9066w+50.122, R* =0.8999, (4) where w is the water content for sample formation. The correlation between ...

  • Praćenje karakteristika ulja za podmazivanje gas-motor kompresora u toku eksploatacije sa ocenom mogućnosti primene domaćih ulja

    Prvoslav Trifunović (1979)
    Gas-motor kompresori, ulja, podmazivanje

  • Određivanje graničnih parametara upotrebe prirodnog gasa u Beogradu

    Dejan Brkić (2005)
    Granični parametri, prirodni gas, Beograd

  • Mogućnost infracrvene termografije pri detekciji štetnih gasova

    Stevan Đenadić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2021)
    Curenje pojedinih gasova je opasnost koja može da izazove velike nezgode. Često je praćeno požarima i eksplozijama koji za posledicu mogu da imaju kako ljudske povrede, tako i štetan uticaj na ekologiju i ekonomiju. Da bi se izbegle takve situacije, preventivna inspekcija je od presudne važnosti. Curenje većine gasova se ne može uočiti golim okom a za otkrivanje i procenu stepena curenja može se koristiti tehnologija toplotnog snimanja (infracrvena termografija). U datom radu predstavljene su mogućnosti i ograničenja primene ...
    IC termografija, curenje gasa, termogram

  • Aлтерације перидотита контролисане карактером флуида на примеру харцбургита Рудника - Серпентинизација или талкизација?

    Стефан Петровић, Наталија Батоћанин (2020)
    У раду су приказани резултати испитивања серпентинисаних харцбургита Брђана (43°58'45.1" СГШ, 20°25'12.6" ИГД) и талкизираних харцбургита откривених у интервалу 429-559.8 m у истражној бушотини 330А/18 (44°07'33.2" СГШ, 20°30'28.5" ИГД) на Руднику. Узорци оба локалитета показују карактеристике резидуалних харцбургита из омотача, односно тектонита; лепидобластичне, бластозрнасте, или порфирокластичне структуре и масивне текстуре. Серпентинисани харцбургити и серпентинити Брђана су изграђени од серпентина, ретких реликата оливина и ортопироксена, акцесорног спинела, и веома ретког секундарног магнезита и магнетита. Најдоминантнији састојак (местимично гради и преко ...
    Рудник, Брђани, харцбургити, серпентинити, талк
    ... in a wide range of temperature, it is helpful in constraints as its formation is controlled by other factors, particularly silica activity in the fluid phase (MÉVEL, 2003). Acid fluids enriched by SiO2 and H+ led to talc formation yet on temperatures of about 300ºС (TROMMSDORF & EVANS, 1977; VELDE ...
    ... abundant constituent, talc, appears either in fibrous and radiating clusters or forms bands. Talc crystallizes in a wide temperature range but its formation only on account orthopyroxene following reaction: 3MgSiO3 + H2O + SiO2 = Mg3Si4O10(OH)2, requires silica-rich fluids that were brought most probably ...
    ... (TROMMSDORF & EVANS, 1977). Serpentinization process is autometamorphic or hydrothermally process that takes part within the range from <100ºC (formation of low-temperature lizardite) to about 500ºC, when antigorite forms (MARTIN & FYFE, 1970; MOODY, 1976). It is commonly presented by the following ...

  • Trace elements and garnet formation in a distal skarn zone: a case study of the Rudnik deposit, Central Serbia

    Bojan Kostić, Pavle Tančić, Natalija Batoćanin (2024)
    geohemija granata, retke zemlje, fluidne inkluzije, skarnovsko ležište Rudnik

  • Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)
    analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem
    ... 105 (B7), 16215–16227. Christie-Blick, N., Biddle, K.T., 1985. Deformation and basin formation along strike-slip faults. In: Biddle, K.T., Christie-Blick, N. (Eds.), Strike-Slip Deformation, Basin Formation, and Sedimentation. SEPM Spec. Publ. (No. 37). Society of Economic Paleontologists and ...
    ... Измењено: 2023-10-14 04:30:39 Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko ...
    ... Универзитета у Београду [ДР РГФ] Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides | Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, ...

  • FTIR Spectroscopic Study Of S-Metolachlor Sorption On Inorganic And Organically Modified Montmorillonite From Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... in the formation of a bond with the montmorillonite. Sorption of S-metolachlor molecules on PTMA-montmorillonite takes place through the interaction between the aromatic benzene ring of S-metolachlor and the aromatic benzene ring of the organic complex (π-π bonds). Also, the formation of a hydrogen ...

  • Ефикасност дистрибуције и коришћења природног гаса у домаћинствима

    Dejan Brkić (2010-03-30)
    Природни гас ће се у будућности све више користити као енергент за подмиривање грејних потреба становништва у српским градовима. Стога је потребно изнаћи најповољнији начин употребе природног гаса. Природни гас се може користити за подмирење грејних потреба становништва на два дијаметрално супростављена начина, и то директно, тако што би се гас директно уводио у зграде путем дистрибутивног система за снабдевање гасом и затим сагоревао у гасном котлу којим је сваки стан опремљен (гасни дистрибутивни систем), или индиректно, тако што ...
    prirоdni gаs, distribuciја gаsа,grејаnjе, cеvоvоdi, cеvоvоdnе mrеžе,fаktоr trеnjа pri prоtоku fluidа,urbаnizаm
    ... д. Овакав гас  се називао градским гасом, а уколико је процес вођен тако да се у саставу гаса добије и  нешто већи проценат водоника,  такав  гас  је био познат и као водени  гас. Ови вештачки  добијени  гасови  су  данас  само  од  историјског  значаја.  Гасоводи  за  дистрибуцију  гасова  добијени ...
    ...  вискозитет гаса који се транспортује η=1,0758·10 ‐5 Pa и густина гаса  ρ=0,84 kg/m3 , а густина ваздуха 1,28 kg/m3 . Проток гаса  је 2000 m3 /h. Претпоставља се да  је апсолутни притисак гаса у  цевоводу око р=4·105 Ра. Користити обрасце по Колбруку и по фон Карману.     Брзина  гаса  у  цевоводу  ...
    ... итет гаса који се транспортује η=1,0758·10‐5 Pa и густина гаса ρ=0,84 kg/m3 ,  а густина ваздуха 1,28 kg/m3 . Проток гаса  је 2000 m3 /h. Претпоставља се да је апсолутни притисак гаса у цевоводу око  р=4·105 Ра. Средња температура у цевоводу је 288,15 К а средњи фактор компресибилитета гаса Zavr=1 ...

  • Pannonian Basin, Pannonian Basin System and Pannonian realm - three different concepts

    Dejan Radivojević (2019)
    Centralni Paratetis, neogen, Panonski basen, Sistem panonskog basena, Panonska oblast
    ... continental, marine, lacustrine and again continental depositional stage. In general, it can be said that the initial phase of the accommodation space formation that will later occupy the Pannonian Basin corresponds to the paleogeographical element of that time - Central Paratethys. The Central Paratethys ...
    ... Pannonian Basin system should be used in complex research that would include not only the basin itself but also the surrounding areas that affect basin formation by eroding adjacent mountain areas and active tectonic movements, While the term Pannonian basin would be used as a sediment deposition area strictly ...

  • Poreklo asocijacije Ni, Ag i Sn minerala u polimetaličnom ležištu Rudnik

    Stefan Petrović, Aleksandar Pačevski, Viktor Bertrandson Erlandson, Rade Jelenković (2022)
    Rudnomikroskopska, SEM-EDS i LA-ICP-MS ispitivanja rudne mineralizacije iz Pb-Zn-Cu-(Ag) ležišta Rudnik, ukazala su na lokalno prisustvo specifične asocijacije minerala nikla, srebra i kalaja, deponovane u tektonskoj breči, arsenopiritsko-pirotinskim, piritsko-pirotinsko-arsenopiritskim i kvarcno-sulfidnim žicama u harcburgitima. U tektonskoj breči deponovan je polimineralni sulfidni agregat kojeg čine pirotin (50), galenit, sfalerit i halkopirit. Arsenopiritsko-pirotinske žice odlikuje dezintegrisani agregat arsenopirita cementovan sa pirotinom. U piritsko-pirotinsko-arsenopiritskim žicama masivni pirit (50%) prorasta sa arsenopiritom i cementovan je polimineralnim agregatom pirotina, galenita i sfalerita. Minerali nikla, srebra ...
    Rudnik, ferokesterit, argentopentlandit, harcburgit, rudne žice