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Упит dcterms_subject_txt:Wadi ash-shati region

450 items

  • 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
    ... low ash (4–12%, dry basis) and relatively high carbon content (62–84%, dry, ash-free bases) [33,35,36], not on low-quality lignite with a high ash content (>40%) and, consequently, a low calorific value (net calorific value <15 MJ/kg). Our preliminary test on lignite having more than 30% of ash indicated ...
    ... is immature (huminite reflectance, 0.30 ± 0.03%Rr) and has a low organic carbon content (29.77% dry basis; 56.30 dry, ash-free basis), low net calorific value (12.1 MJ/kg), and high ash content (47.12%), allowing to study the influence of HDPE on the low-quality lignite. Lignite was crushed and pulver- ...
    ... with HDPE [42]. Therefore, the paper investigates lignite/HDPE co-pyrolysis as a possible method for utilization of lignite of extremely low quality (ash content > 40%; organic carbon content <30%). The objective was to examine and confirm the existence of a synergetic effect during low-quality lignite ...

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... transportation systems for slag and ash to landfills. Considering these benefits indicates how significant economic effects of the UCG application are. In parallel, environmental benefits are also exceptional. Utilization of UCG method does not generate any slag and ash, there is no degradation of the ...
    ... there is no need for storing about 50% of the total mass is waste material (slag and ash re- main underground), — there is no need to secure significant areas necessary for the collocation and disposal of slag and ash, Petrović, D. T., et al.: Valorization of Non-Balanced Coal Reserves in Serbia ...
    ... product (normalized to 1 MJ of energy), — there is no significant degradation of the terrain, since all the non-combustible substances (slag or ash) remain in the deposits bencath the surface of the earth, — there is no substantial pollution of the environment and the working environment, as there ...

  • Analysis and Calculation of MMRS and Primary Gas Distribution Network in Urban Environment – Case Study Kučevo

    Aleksandar Madžarević, Pavle Janković (2022)
    Oblast primene prirodnog gasa je veoma široka. Kao energent može se koristiti za proizvodnju energije u elektranama, toplanama i postrojenjima za kombinovanu proizvodnju energije ili za zadovoljavanje različitih toplotnih potreba u industriji i širokoj potrošnji. Gas se može upotrebiti i kao sirovina u hemijskoj i petrohemijskoj industriji, a tokom poslednjih decenija nalazi primenu i u saobraćaju kao pogonsko gorivo u SUS motorima. Sa ekološkog stanovišta, prirodni gas predstavlja najprihvatljiviji izvor energije u poređenju sa drugim fosilnim gorivima. Pri sagorevanju ...
    distribucija gasa, projektovanje gasovoda, analiza potrošnje

  • Conversion of land areas after coal mine closure and reclamation

    Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić (2023)
    Otkopavanje uglja površinski i podzemno praćeno je degradacijom zemljišta, promenom formiranja predela i izmenom flore i faune. Od velikog značaja je razvoj novih naučno utemeljenih pristupa obnovljanje antropogeno poremećenih predela zasnovanih na formiranju rekultivacionih i rudarskih tehnologija. Apsolutno je neophodno obezbediti sveobuhvatno kvalitetno očuvanje zemljišnih i vodnih resursa i odrediti rekultivisano zemljište za novu namenu. U ovom članku je dat pregled najpopularnijih metoda rekultivacije zemljišta i mogućnosti rekultivacije zemljišta nakon završetka rekultivacije i zatvaranja rudnika uglja.
    rekultivacija, melioracija, revitalizacija, otkopavanje uglja, održivi razvoj
    ... the greatest influence on the change in terrain morphology (PK "Novi Kostolac", "Klenovnik" and "Ćirikovac", with disposal sites for overburden and ash, i.e., slag from the thermal power plant). similar of the relief changes in the originally flat Stig - south and east of Drmno (PK "Drmno", with coal ...
    ... a vital role in improving the environment for residents and the ecological landscape, as well as contributing to the economic grow of the mining region. REFERENCES 1. 2. 10. 11. Ignatyeva, M., Yurak, V., Pustokhina N. Recultivation of Post-Mining Disturbed Land: Review of Content and ...

  • Investigation of Co0.9Ho0.1MoO4 Nanopowders Obtained by Glycine Nitrate Procedure

    Milena Rosić, Maja Milošević, Maria Čebela, Vladimir Dodevski, Vesna Lojpur, Radomir Ljupković, Aleksandra Zarubica (2023)
    ... Cyril and Methodius University, Skopje 26th Congress of Chemists and Technologists of Macedonia Keywords: Alkali activated materials, kaolin, fly ash, XPS, HR-TEM, natural radioactivity ICTM P-3 Investigation of CoooHoo. MoOu Nanopowders Obtained by Glycine Nitrate Procedure M. Rosić" , M. Milošević ...

  • Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije

    Jelena Majstorović-Necković, Vladimir Čebašek, Veljko Rupar (2023)
    Ispitivanja stena kao radne sredine, odnosno materijala sa kojim se gradi, na kome se gradi i u kome se gradi, svojom složenošću zahteva njeno svestrano izučavanje po velikom broju parametara. Zadatak Mehanike stena je da što bolje upozna ponašanje stenske mase i njenu otpornost na dejstvo pritiska, zatezanja i smicanja, kao i dinamičkih svojstava. Poznavanje navedenih parametara i njihova korelacija omogućavaju pouzdaniji izbor parametara za projektovanje danas sve zahtevnijih uslova kako podzemne, tako i površinske eksploatacije. U ovom radu ...
    mermer, jednoosna čvrstoća na pritisak, čvrstoća na istezanje, brzina longitudinalnih elastičnih talasa, korelacija

  • Hronološki pregled razvoja površinske eksploatacije lignita u Srbiji

    Bojan Dimitrijević, Radmila Gaćina, Bogoljub Vučković (2023)
    U ovom preglednom radu dat je istorijski pregled razvoja površinske eksploatacije lignita na teritoriji Srbije, uz kratak osvrt na geološki nastanak i kvalitet i rezerve uglja, kao i mogućnosti korišćenja za dalju upotrebu. Kolubarski, Kostolački i Kovinski ugljeni baseni lignita u Srbiji, ne računajući Kosovsko-Metohijski i Drenički u sastavu AP Kosovo i Metohija po Rezoluciji 1244 UN, su ležišta najrasprostranjenijeg uglja - lignita u Srbiji koji se eksploatiše od druge polovine 20. veka na velikom broju površinskih kopova ...
    površinska eksploatacija ugalja, lignit, Kolubara, Kostolac, Srbija

  • Determining seismic hazard in slowly deforming region: Can we gather enough information from karst caves?

    Ана Младеновић, Јелена Ћалић (2021)
    ... seismic hazard in slowly deforming region: Can we gather enough information from karst caves? Ана Младеновић, Јелена Ћалић Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Determining seismic hazard in slowly deforming region: Can we gather enough information ...
    ... calic@gi.sanu.ac.rs) Methods to determine seismic hazard in any region vary depending on the regional seismicity, butcan be roughly grouped into two main groups: one based on probabilistic methods that use dataabout known seismicity in the region, and another, which is based on data related to the faulti ...
    ... 2021© Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. Determining seismic hazard in slowly deforming region: Can wegather enough information from karst caves? Ana Mladenović1 and Jelena Ćalić2 1University of Belgrade - Faculty of Mining and Geology, Department ...

  • Seizmičnost Banjalučkog regiona i efekti zemljotresa na površini

    Drago Trkulja (1997)
    Seizmičnost, zemljotresi, Banjalučki region

  • U-Pb zircon geochronology of the Paleogene – Neogene volcanism in the NW Anatolia: Its implications for the Late Mesozoic-Cenozoic geodynamic evolution of the Aegean

    E. Yalçın Ersoy, Cüneyt Akal, Ş. Can Genç, Osman Candan, Martin R. Palmer, Dejan Prelević, İbrahim Uysal, Regina Mertz-Kraus (2017)
    The northern Aegean region was shaped by subduction, obduction, collision, and post-collisional extension processes. Two areas in this region, the Rhodope-Thrace-Biga Peninsula to the west and Armutlu-Almacık-Nallıhan (the Central Sakarya) to the east, are characterized by extensive Eocene to Miocene post-collisional magmatic associations. We suggest that comparison of the Cenozoic magmatic events of these two regions may provide insights into the Late Mesozoic to Cenozoic tectonic evolution of the Aegean. With this aim, we present an improved Cenozoic stratigraphy ...

  • Determining seismic hazard in slowly deforming region: Can we gather enough information from karst caves?

    Ana Mladenović, Jelena Ćalić (2021)
    Methods to determine seismic hazard in any region vary depending on the regional seismicity, but can be roughly grouped into two main groups: one based on probabilistic methods that use data about known seismicity in the region, and another, which is based on data related to the faulting processes and determination of seismically active faults. Both groups of methods are relatively good for seismically active regions. However, in regions of low seismic activity and slow deformations, there is neither ...

  • Landscapes and Landforms in the Toplica region (Southern Serbia)

    Aleksandar Valjarević, Natalija Batoćanin, Danica Srećković-Batoćanin, Tin Lukić (2022)
    U radu je prikazano 11 geomorfoloških oblika koji zaslužuju naziv objekata geonasledja. Rad razmatra genezu objekata, neophodnost geokonzervacije, tamo gde još nije pokrenuta, i položaj i distribuciua objekata unutar zona različitog turističkog interesovanja primenom metoda daljinske detekcije, terenskih osmatranja i geografskog informacionog sistema (GIS) .
    Toplica, GIS, analiza, geomorfološki objekat, objekat geonasledja, geneza, erozija

  • Preliminary regional landslide susceptibility assessment using limited data

    Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)
    In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...
    klizišta, podložnost
    ... representative of the particular region of in- terest. 3. LANDSLIDE SUSCEPTIBILITY MODELLING FOR THE POLOG REGION IN THE REPUBLIC OF MACEDONIA 3.1. Study area The Polog region is located in the northwest part of the Republic of Macedonia (Fig. 2). This region covers ~2420 km2 including the densely ...
    ... assigning so called rating points to the grid cells on which the region is divided. Values of the rating points vary from 0 to 3 and depend on the parameter’s character and importance for land- slide development within the region of interest. A so called Total Landslide Susceptibility Rating (TLSR) ...
    ... rating points of each parameter and divid- ing the region into five susceptibility zones according to Jenks natural breaks classification. Ver- ification of the TLSR model is then performed by overlaying the landslide inventory map of the selected region over the prepared susceptibility map. The sensitivity ...

  • Principal Metallogenic Featurs of Kerman Copper Region in Iran

    Halaviaty Jahangir (1972)
    Metalogenic featurs, Iran

  • Contents of potentially toxic elements in residual soils of a long-term mining region: a key study from Central and Western Serbia

    Milun Jovanović, Dejan Prelević, Vidojko Jović, Danica Srećković-Batoćanin, Snežana Branković (2022)
    Regional geochemical research of residual soil was conducted in an area of about 20,000 km2 in the region of Central and Western Serbia, where six metallogenetic zones and mining since ancient times have been documented. The geochemical background variation in the residual soil was established upon the contents, spatial pattern and natural background of potentially toxic elements (PTEs). The limits of natural background values (mg·kg-1) were determined by the integral method. Our data show that anomalous concentrations of As, ...
    prostorna distribucija, toksični elementi, rezidualno tlo, procena rizika

  • Metalogenija gvožđa i ocena potencijalnosti Demir Hisarskog rudnog regiona

    Jordan Manasiev (1981)
    Metalogenija, potencijalnost, gvožđe, Demir, Hisar

  • 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

  • Vodosnabdevanje podzemnim vodama u Srbiji-stanje i perspektive

    Dušan Polomčić, Zoran Stevanović, Petar Dokmanović, Petar Papić, Vesna Ristić-Vakanjac, Bojan Hajdin, Saša Milanović, Dragoljub Bajić (2011)
    ... malom izdašnošću izvora, najčešće do 1 l/s (lit. 9). Region centralne Srbije se u hidrogeološkom pogledu znatno razlikuje od okolnih regiona, pre svega regiona zapadne Srbije i regiona istočne Srbije. Najvažniji resursi podzemnih voda ovog regiona vezani su za moćne aluvijalne izdani većih vodotokova ...
    ... zahvataju, hidrogeološki regioni u Srbiji su klasi'kovani na sledeći način: 1. region Bačke i Banata (koji obuhvata severne i istočne delove Panonskog basena), 2. region Srema Mačve i Posavo-Tamnave (jugozapadni deo Panonskog basena i severozapadni deo Dinarida) 3. region jugozapadne Srbije (jugozapadni ...
    ... (jugozapadni deo Dinarida), 4. region zapadne Srbije (zapadni Dinaridi), 5. region centralne Srbije (srpsko-makedonski masa i šumadijsko-kopaoničko-kosovska zona), 6. region istočne Srbije (Dakijski basen i Karpato-balkanidi Srbijie) (slika 2). Slika 2: Hidrogeološki regioni Srbije (prema Vodoprivrednoj ...

  • The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system

    Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic (2016)
    The influence of additives (alkyl polyglucoside, Glucopon 600 CS UP and alcohol ethoxylate C18E100) on the behavior of the water/toluene/Lutensol ON 50 (technical oxoalcohol, i-C10E5) microemulsion system as a function of temperature and composition has been investigated. The phase behavior of the microemulsions was determined by vertical sections through the Gibbs phase prism (fish-like phase diagrams). Alkyl polyglucoside shifts the one phase region to lower temperatures compared with water/toluene/Lutensol ON 50 mixtures. This is contrary to the expectation, considering ...
    микроемулзија, толуен, алкил полиглукозид, оксоалкохол етоксилат, појачивач ефикасности, „fish“ дијаграми
    ... Microemulsion of water/tolune/Lutensol ON 50 and alcohol ethoxylate CigEioo was investigated • Strongly hydrophilic C+jEx+o shifted the one phase region to higher temperature Abstract The influence of aaditives (alky! polyglucoside, Glucopon 600 CS UP and alco- hol ethoxylate CysEto) on the behavior ...
    ... emulsions was determined by vertica! sections through the Gibbs phase prism (fish-like phase diagrams). A/ky/ polyglucoside shifts the one phase region to /ower temperatures comparedđ with water/foluene/Lutenso! ON 50 mikxtures. 7his is contrary to the expectation, considering the extreme hyarophilic ...
    ... system increases the solubiliz- altion capacity of the surfactant, even if the co-surfactant is used in small quan- tities, and shifts the one-phase region to higher temperature by a few "C. Keywordas: microemulsion, toluene, alky! polyglucoside, oxoalcoho/ ethoxylate, efficiency booster, “ish” diagrams ...

  • Ophiolites and related geology of the Balkan region (Editorial Material).

    Robertson H.F. Alastair, Karamata Stevan, Šarić Kristina (2009)