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Упит dcterms_subject_txt:Stratigraphy,Economic Geology,Geology,Fuel Technology

1149 items

  • Distribution of major and trace elements in the Kovin lignite (Serbia)

    Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)
    geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...
    General Earth and Planetary Sciences, General Environmental Science
    ... – International Journal of Coal Geology, 58, 193–204. doi: 10.1016/jcoal.2003.10.009 HUGGINS, F.E., SHAH, N., HUFFMAN, G.P., KOLKER, A., CROWLEY, S., PAL­ MER, C.A. & FINKELMAN, R.B. (2000): Mode of occurrence of chromium in four US coals.– Fuel Processing Technology, 63, 79–92. doi: 10.1016/j.coal ...
    ... station, Turkey.– International Journal of Coal Geology, 61/(1–2), 35–63. doi: 10.1016/j. coal.2004.06.004 VASSILEVA, C. & VASSILEV, S. (2005): Behaviour of inorganic matter during heating of Bulgarian coals. 1. Lignites.– Fuel Processing Technology, 86, 1297–333. WARD, C.R. (2002): Analysis and ...
    ... Bulgarian coals.– Fuel Processing Technology, 55, 55–69. doi: 10.1016/S0378­3820(97)00079­9 VASSILEV, S. & VASSILEVA, C. (2009): A new approach for the combined chemical and mineral classification of the inorganic matter in coal. 1. Chemical and mine­ ral classification systems.– Fuel, 88, 235–245. doi: ...

  • Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability

    Marija Živković, Dejan Ivezić (2021)
    Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...
    рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија
    ... the intro- duction of more efficient technology with the same effi- ciency for consumers and level of comfort, • Reduction of carbon dioxide emission of 6.5% per year by introducing this alternative renewable energy source and substitution of coal, heavy fuel oil, and natural gas, • Reduction of ...
    ... dependencies of each energy carrier (fuel), as follows: Id,i [ ∕ ] Import dependency of the ith energy carrier/fuel utilized in DH systems is calculated by Eq. (4) pi [/] Fraction of the ith input energy carrier/fuel in the fuel mix ( ∑ pi = 1). Fuel mix diversification (H) is most commonly ...
    ... Ai Heating area of the ith consumer Id Import dependency pi Fraction of the ith input energy carrier/fuel in the fuel mix ( ∑ pi = 1) Id,i Import dependency of the ith energy carrier/fuel H Shannon–Wiener index FRES Share of renewable energy sources E i,RES Energy content of input to the ...

  • Micro- to nanoscale textures of gold in arsenopyrite and scorodite from the As-Au-Bi assemblage of Drenjak locality (Serbia)

    Ivana Jelić, Janez Zavašnik, Marina Lazarov, Alena Zdravković, Sabina Kovač, Jovica Stojanović, Aleksandar Pačevski (2023)
    Arsenopyrite and pyrite are important carriers of Au that is present in the form of microscopic and “invisible” gold. Such gold can be expected to be released upon the process of oxidation of these sulfides. In studied gold mineralization at Drenjak, related to the granitoids of the Oligocene-Miocene Kopaonik Ore District, the main arsenopyrite-pyrite-(bismuthinite) sulfide assemblage was formed in the quartz bodies and partly replaced by scorodite (FeAsO4·2H2O) and Bi-arsenate. With only up to 5 ppm of gold recorded ...
    Economic Geology, Geochemistry and Petrology, Geology

  • Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation

    Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović (2023)
    The integration of wastewater heat pumps (using purified water) in district heating systems is analyzed in this paper. The simulation procedure is proposed to analyze the impacts of stochasticity of purified water temperature and flow to heat pump integration and operation. The analysis includes calculation of the daily and seasonal coefficient of performance, as well as fossil fuel savings and CO2 emission reduction due to wastewater heat pump use. The proposed procedure is implemented for the case study in ...
    otpadne vode, toplotna pumpa, daljinsko grejanje, simulacija

  • Hydrogeochemistry of thermal groundwaters in the Serbian crystalline core region

    Tanja Petrović Pantić, Manfred Birke, Branislav Petrović, Jovana Nikolov, Veselin Dragišić, Vladimir Živanović (2015)
    Economic Geology,Geochemistry and Petrology

  • The State and Perspective of Belgrade District Heating System Development

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Fethi Silajdžić, Samra Arnaut, Goran Đelić (2019)
    District heating (DH) system in Belgrade provides energy for heating of more than 21 million m2 in households (app. 50% of all households), public, commercial and industry sectors. Public Utility Company “Beogradske elektrane” is responsible for all segments of the DH system operation. The system is fueled mostly by natural gas. The share of renewables is negligible. The research analyzes effects of implementation of two main projects proposed in the Development Strategy of the PUC - the introduction of ...
    daljinsko grejanje, Beograd, razvoj
    ... (600 MW) and in CHP waste incineration plant in Vinča (56.5 MW). These projects are analyzed from energy and environmental aspects. Projections of fuel mix in Belgrade DH system for the period until 2030 are presented supported with appropriate indicators (P/F ratio, import dependency, primary/final ...
    ... Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Dejan Ivezić is Professor in Energy and Sustainable Development at University of Belgrade – Faculty of Mining and Geology, Head of ...
    ... 1, Marija Živković1, Aleksandar Madžarević1, Fethi Silajdžić2, Samra Arnaut2, Goran Đelić 3 1University of Belgrade – Faculty of Mining and Geology 2 ENOVA, Sarajevo 3 Public Utility Company “Beogradske elektrane”, Belgrade dejan.ivezic@rgf.bg.ac.rs District heating (DH) system in Belgrade ...

  • 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 ...
    emissions, mining, auxiliary machines

  • Life Cycle Assessment of Individual Wood Biomass Heating Systems in Households

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    The use of solid fuels (wood biomass and coal) for heating of households continues to be common practice within European countries. Solid fuel combustion in households contributes more than 46% to total emissions of fine particulate matter. In this study, a life-cycle assessment (LCA) of firewood-based and pellet-based heating systems is performed. These two systems represent two different types of individual wood biomass heating systems. In the case of the firewood-based heating systems, it is analyzed a typical stove ...
    Grejanje, Analiza životnog ciklusa, Drvna biomasa, Individualni sistemi grejanja
    ... best available models in the European market. To estimate the amount of fuel needed for one heating season, it is used AERS’s data on the average efficiency of HSs and the lower heating value (LHV) (net calorific value) of each fuel. It is assumed that the period of use of the appliances is 20 years. ...
    ... their specifications that are mostly based on researches in laboratory conditions. Table 1. The estimation of the annual amount of fuel consumption [17], [18] Fuel Efficiency (%) LHV (MJ/kg) Annual amount (kg) Firewood 55 14.7 4,007 Pellet (wood) 80 17 2,383 The efficiency of HSs and LHV are ...
    ... Abstract: The use of solid fuels (wood biomass and coal) for heating of households continues to be common practice within European countries. Solid fuel combustion in households contributes more than 46% to total emissions of fine particulate matter. In this study, a life-cycle assessment (LCA) of ...

  • Possibilities for Reduction of Energy-Related Air Pollution in Serbia - Exploring Energy Scenarios

    Marija Živković, Boban Pavlović, Dejan Ivezić, Aleksandar Mijatović (2023)
    Fossil fuels and biomass account for almost 93% of the total primary energy supply in Serbia. Meeting the energy needs of consumers implies a transformation of the chemical energy of fuels through combustion processes to obtain heat that can be utilized as such, or further transformed into mechanical or electrical energy. These processes have an undeniable impact on air pollution, even in cases of biofuels or hydrogen combustion. Possibilities for air pollution reduction are identified, both on the supply ...
    загађење ваздуха, сценарији енергетског развоја, Србија

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)

    Nikita Bragin, Nevenka Đerić (2020)
    Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia
    ... Triassic shallow-water carbonate ramp and platform sediments, and are widespread in Jurassic times on the Adriatic margin. Their age determination, stratigraphy, and facies are important for the reconstruction of tectonic motion and the arrangement of palaeo­oceanic basins and continental blocks. Due ...
    ... January 24, 2020 Revised manuscript accepted July 29, 2020 Available online October 22, 2020 Keywords: Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia G eo lo g ia C ro a ti ca Geologia Croatica 73/3144 Figure 1. The main tectonic units of Serbia and adjacent territories (modified ...
    ... Formation could have started earlier than previously thought – in the early Bathonian or even in the late Bajocian. Further study of the bio- stratigraphy and detailed analysis of the sections would be needed to achieve a better understanding of the composition and nature of the Ljubiš Formation ...

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... outdated technology and equipment in every economic sector, as well as low energy efficiency and significant reliance on sulphur-containing lignite. Over 50% of household heating in Serbia is based on solid fuels and it has to be highlighted that this is accompanied by the use of inefficient fuel ...
    ... road transport fuel consumption (“Technology Roadmap: Delivering Sustainable Bioenergy. International Energy Agency (IEA)” 2017). The global bioethanol market has been dominated by the US and Brazil that jointly account for approximately 85% of the world production (“Technology Roadmap: Delivering ...
    ... Faculty of Mining and Geology for the subject “Coal deposits.” From 2009 to 2014 Dragana Životić hss worked as an assistant professor, since 2014 she has worked as an associate professor at the University of Belgrade, Faculty of Mining and Geology in the Department of Economic Geology and participated ...

  • Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

    Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)
    Polimeri i plastika, opšta hemija
    ... 1205–1208. [CrossRef] 57. Toscano, G.; Pedretti, E.F. Calorific Value Determination of Solid Biomass Fuel by Simplified Method. J. Agric. Eng. 2009, 40, 1–6. [CrossRef] 58. Boie, W. Fuel technology calculations. Energietechnik 1953, 3, 309–316. 59. Tsiamis, D.A.; Castaldi, M.J. Determining Accurate ...
    ... Germany, 1998. 62. Životić, D. Geology of Coal; University of Belgrade, Faculty of Mining and Geology: Belgrade, Serbia, 2018; pp. 10–13. (In Serbian) 63. Wong, S.; Ngadi, N.; Abdullah, T.; Inuwa, I. Current state and future prospects of plastic waste as source of fuel: A review. Renew. Sustain. Energy ...
    ... and Geology, University of Belgrade, DuSina 7, 11000 Belgrade, Serbia; nikoleta.aleksic@rgf.bg.ac.rs (N.A.); dragana.zivotic@rgf.bg.ac.rs (D.Z.) 4 Faculty of Chemistry, University of Belgrade, Studentski Trg 12-16, 11000 Belgrade, Serbia; snezanat@chem.bg.ac.rs Institute of Chemistry, Technology and ...

  • Depth estimation of archeological objects using Euler 3D deconvolution of magnetic data

    Vesna Cvetkov, Ilija Vasiljević, Mirko Petković (2015)

  • Selection demolition sylo technology

    Gligorić Miloš, Milojević Jelena (2015)

  • 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
    ... Beaumont, V., & De B. Penteado, H.L., 2001. Rock-Eval 6 Technology: Performances and developments. Oil & Gas Science and Technology – Revue d’IFP Energies Nouvelles, 56: 111–134. Bosellini, A., Morsilli, M. & Neri, C., 1999. Long term-stratigraphy of the Apulian Platform margin (Upper Jurassic – to ...
    ... Beaumont, V., & De B. Penteado, H.L., 2001. Rock-Eval 6 Technology: Performances and developments. Oil & Gas Science and Technology - Revue dIFP Energies Nouvelles, 56: 111-134. Bosellini, A., Morsilli, M. & Neri, C., 1999. Long term-stratigraphy of the Apulian Platform margin (Upper Jurassic — to Eocene ...
    ... tions, including vitrinite re�ectance. All investigations were carried out at the University of Belgrade, Faculty of Mining and Geology, in the Department of Economic Geology. Rock-Eval pyrolysis was performed using a Rock-Eval 6, Standard analyser. About 100 mg (25 mg for coal sample) of the pulverized ...

  • The rational technology model selection of the underground drivage development for the given conditions

    Tokalić Rade, Vidanović Nebojša, Savić Ljubinko (2013)

  • Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić, (2019)

  • Application of Membrane Technology for Separation CO2 from Natural Gas

    Lola Tomić, Dušan Danilović, Vesna Karović Maričić, Branko Leković, Miroslav Crnogorac (2020)
    Natural gas consists of a mixture of hydrocarbons with the largest share of methane, and non-hydrocarbon impure components such as N2, CO2 and H2S. In order to fulfill the gas market requirements, it is necessary to separate these unwanted components from the natural gas stream. There are several available technologies for the separation of CO2 from natural gas, such as: polymeric membranes, cryogenic distillation, absorption and adsorption. In this paper is presented the mechanism of CO2 separation using membrane technology, ...
    separacija CO2, polimerne membrane, membranski moduli

  • The analysis of the geothermal energy capacity for power generation in Serbia

    Jana Stojković, Goran Marinković, Petar Papić, Mihailo Milivojević, Maja Todorović, Marina Ćuk (2013)
    Renewable Energy, Sustainability and the Environment
    ... Palanka and Debrc. The geothermal flow rate is 2.5 l/s and the water temperature is 48 °C, about 7.5 tons of fuel oil or 82.6 MWh of heat en- ergy may be saved per heating season (assuming the fuel oil heat capacity was 40 MJ/kg. Methodology Samples of groundwater were collected for this research during ...
    ... Palanka and Debrc. The geothermal flow rate 1s 2.5 I/s and the water temperature is 48 °C, about 7.5 tons of fuel oil or 82.6 MWh of heat en- ergy may be saved per heating season (assuming the fuel oil heat capacity was 40 MJ/kg. Methodology Samples of groundwater were collected for this research during ...
    ... presence of a younger intrusion. Total electric power output from this geothermal resource is 6 MWe, equal to an amount of about 13 000 tons of liquid fuel [18]. According to an estimate by quartz geothermometer based on the expected groundwater temperature of 160 °C, the Vranjska Banja alone possesses ...