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Упит dcterms_subject_txt:fly ash

82 items

  • The effect of the content of unburned carbon in bottom ash on its applicability for road construction

    Trifunović Prvoslav, Marinković Slobodanka, Tokalić Rade, Matijašević Srdjan (2010)

  • The Perception Differences Between Expert and Non-expert Audience on the Enviromentally Undesirable Facilities – The case of “Cirikovac mine” Ash Landfill

    Knežević Dinko, Radivojević Sandra, Stefanović Milica, Drobac Jelena, Ravilić Marina (2013)

  • 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
    ... content, %; Adb – ash content, dry basis, %; Sdb – total sulphur content, dry basis wt.%; Vdb – volatile mat- ter, dry basis wt.%; Q daf g – gross calorific value, dry, ash-free basis, MJ/kg; Q daf n – net calorific value, dry, ash-free basis, MJ/kg; Cdaf – carbon content, dry, ash-free basis, %; Hdaf ...
    ... content, %; Adb – ash content, dry basis, %; Sdb – total sulphur content, dry basis wt.%; Vdb – volatile matter, dry basis wt.%; Q daf g – gross calorific value, dry, ash-free basis, MJ/kg; Q daf n – net calorific value, dry, ash-free basis, MJ/kg; Cdaf – carbon content, dry, ash-free basis, %; ...
    ... Hdaf – hidrogen content, dry, ash-free basis, %; Ndaf – nitrogen content, dry, ash-free basis; Odaf – oxigen content, dry, ash-free basis, %; X̅ – arithmetic mean value; Min – minimum; Max – maximum; s – standard deviation. Note: Values of parameters for individual samples are given in Table S-II ...

  • Evolution of coal ash solidification properties with disposal site depth and age, Gacko Thermal power plant case

    Knežević Dinko, Nišić Dragana, Beatović Sreten, Tomašević Aleksandra (2017)

  • Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag

    Nikolić Irena, Marković Smilja, Janković-Častvan Ivona, Radmilović V.Vuk, Karanović Ljiljana, Babić Biljana, Radmilović R.Velimir (2016)

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending

  • Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete

    Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović (2021)
    sagorevanje lignita, otpadna šljaka, zamena cementa, proizvodnja maltera i betona, fizičko-mehanička i fizičko-hemijska karakterizacija
    ... effect, soil or water contamination, etc.) [3]. The non-combustible part of lignite mainly consists of moisture and ash, of which about 85–95% is fly ash and about 10% is slag [7]. Fly ash Minerals 2021, 11, 925. https://doi.org/10.3390/min11090925 https://www.mdpi.com/journal/minerals minerals Article ...
    ... effect, soil or water contamination, etc.) [3]. The non-combustible part of lignite mainly consists of moisture and ash, of which about 85-95% is fly ash and about 10% is slag [7]. Fly ash Minerals 2021, 11, 925. https: / /doi.org/10.3390/min11090925 https: / /www.mdpi.com/journal/minerals Minerals ...
    ... of waste in the construction industry, previous research has largely been focused on finding the useful value of fly ash [9], blast furnace slag of different origins [10,11], or slag and ash from the metallurgical industry [12,13]. Additionally, there are some studies which described that the tailings ...

  • Surface functional groups and degree of carbonization of selected chars from different processes and feedstock

    Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)
    The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...
    Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS
    ... part ofthe ash. Consequently, Y is lower than Y„„x for AC2 in contrast to all other chars except PW700g, which seems to be most affected by the inhomogeneous distribution of ash components due to its high ash content. The higher values for Ya„h than Y„x are reasonable because some ash forming elements ...
    ... would be found for ash-rich HW500f resulting in an O/C ratio similar to SW500f. The largest relative standard deviations for the oxygen content were found for the biochars with the largest ash content HW500f (18.1%) and PW700g (19.4%). This might be an indica- tion that the ash components are i ...
    ... Gransmore Green, Essex, England) with automatic temperature compensation for 25 "C. Removal of acid soluble ash components. The chars were shaken for 24 h with 0.05 M HClin order to remove ash components [57]. Then they were washed twice with 1 M CaCl, and subsequently with deionized water (all at ...

  • Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља

    Бојан Земљак (2024)
    Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...
    Елементи ретких земаља, резерве, употреба, представници и методе опоравка елемената ретких земаља
    ... 2019. Progressive utilisation prospects of coal fly ash: A review. Science of the Total Environment, 672, p.951-989. [14] Mahandra, H., Hubert, B. and Ghahreman, A., 2021. Recovery of rare earth and some other potential elements from coal fly ash for sustainable future. In Cleanm Coal Technologies: ...
    ... gasification ash. Fuel, 87(6), p.857-869. [166] Panda, L. and Dash, S., 2020. Characterization and utilization of coal fly ash: a review. Emerging Materials Research, 9(3), p.921-934. [167] Wang, Z., Dai, S., Zou, J., French, D. and Graham, I.T., 2019. Rare earth elements and yttrium in coal ash from ...
    ... separation on the enrichment and recovery of rare earth elements from South African coal fly ash. [172] Kashiwakura, S., Kumagai, Y., Kubo, H. and Wagatsuma, K., 2013. Dissolution of rare earth elements from coal fly ash particles in a dilute H2SO4 solvent. Open Journal of Physical Chemistry, 3(02), p ...

  • Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes

    Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović (2016)
    menadžment, rudrastvo i energetski kompleksi, okruženje, održivi razvoj, mrežno planiranje
    ... 1 + 0 + 1 + 1 + 0 + 1 36 27 Ash dispersal into surrounding surface water due to wind 4 2 1 + 0 + 1 + 0 + 0 + 0 16 28 Ash-hole rinsing by atmospheric precipitation 3 3 1 + 0 + 1 + 1 + 0 + 1 36 29 Irregular ash dump sprinkling 4 3 0 + 1 + 0 + 1 + 0 + 1 36 30 Unfavorable ash and water ratio in the thick ...
    ... layer; a change in pedological and geological composition; disturbance of soil stability; land subsidence; disposal of tailings, ash, and slag; and delivery of coal dust and ash through airflow and gas emissions from coal combustion. Wastewaters in the abandoned surface mines and deep mines lead to pollution ...
    ... buried humus layer Emissions of heavy metals into the surrounding land Disposal of tailings, ash and slag Improper disposal of tailings A4 Inadequate disposal of sludge Irregular sprinkling of ash landfill Transportation of coal and tailings Exhaust gas emissions during the transportation ...

  • Approach to operational mine planning: Case study Tamnava West

    Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Ranka Stanković (2014)
    ... testing was conducted for Moisture, Ash, Lower (LVC) and Upper Calorific Value. After preliminary statistical analyses the 367 sample where rejected based on correlation between Ash and LCV (Figure 4). Figure 4. Preliminary statistic analyses of Ash/LCV corelation 2.1.2. Geological ...
    ... control between the mine site and the utility plant is a complex problem owing to the variable nature of coal properties (heating value, sulfur, ash), even within the same coal seam. In order to ensure a normal and efficient operation of the power plants fed with coal it is necessary to reduce ...
    ... black coal utilization, Callaghan 5 Galetakis M, Pavloudakis F, 2009, The effect of lignite quality variation on the efficiency of on-line ash analyzers, International Journal of Coal Geology, vol. 80, pp. 145-156 6 Beretta F, Costa J, Koppe J, Souza V, 2009, Reducing coal quality ...

  • Demise of the Wetterstein Carbonate Platform and onset of the Dachstein Carbonate Platform recorded in deep-water successions of the East Bosnian-Durmitor megaunit (Pliješevina, northern Montenegro, Dinarides)

    Milica Mrdak, Eva Wagerer, Milan Sudar, Nevenka Djerić, Martin Đaković, Hans-Jürgen Gawlick (2024)
    Triassic, Carnica event, clay mineralogy, conodont biostratigraphy, Neo-Tethys

  • The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia

    I. Kojic, J. Kus, D. Zivotic, K. Stojanovic (2021)
    ... (Kus et al., 2020). The contents of moisture, ash, sulphur, and total organic carbon (TOC) were determined. The biomarker compositions were evaluated using gas chromatography-mass spectrometry. TOC contents (48.17 – 57.20 %) associated with ash contents < 11.5 % indicate relatively stable ...

  • Mineralni i hemijski sastav čestica u atmosferi zone Kolubarskog basena i uticaj na životnu sredinu

    Željko R. Cvetković (2013-11-18)
    Čestice iz vazduha su prikupljane u blizini termoelektrane i površinskih kopovarudnika uglja u Kolubarskom basenu. Izmereni srednji sadržaji koncentracija rastvornih,nerastvornih i ukupnih taložnih materija na godišnjem nivou prelaze 200 mg/m2dan (K-1, K-3, K-4, K-5). Distribucija čestica na svim lokacijama klasifikovana je na česticeveličine veće od 10 μm, zatim na čestice veličine od 10 μm do 2,5 μm i klase česticaveličine ispod 2,5 μm. Ovakva podela je dala odnos koncentracija inhalatornih irespiratornih čestica po mernim mestima. Skenirajuća elektronska mikroskopija jepokazala ...
    mineral, četica, prašina, leteći pepeo, aerosediment, PM10, teški metali,koncentracija, veličina čestice, Kolubara
    ... data base of chemical, mineralogical and physical properties of North American fly ash to study the nature of fly ash and its utilization as a mineral admixture in concrete. In R.I, Day and F. P. Glasser, Eds. Fly Ash and Coal Conversion By Products: Characterization, Utilization and Disposal VI ...
    ... (1999) Petrology, mineralogy and chemistry of magnetically-separated sized fly ash, Fuel 78, 197-203. Hower, J. C. and Mastalerz, M. (2001). An approach toward a combined scheme for the petrographic classification of fly ash, Energy & Fuels 15, 1319-1321. Hubbard, F. H., McGill, R. J., Dhir, R. ...
    ... metals in fly ash and its effect on solubility, Fuel 83, 2286-5-2292. Kihong, P & Hung, D. D. (2010). Characterization of metal aerosols in PM10 from urban, industrial, and Asian Dust sources., Environ. Monit. Assess. 160, 289-300. Kutchko, G. B. and Kim, G. A. (2006). Fly ash characterization ...

  • 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 ...

  • Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања

    Бранко Костић, Ксенија Ераковић, Дејан Прелевић, Сабина Ковач, Драгана Животић (2023)
    геохемија, угаљ, продукти сагоревања, XRF, ICP-MS

  • 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 ...

  • 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 ...
    lignite, heavy metals, concentrations
    ... characteristics of coal seams and perform a comparative analysis of coal af}ectation on the environment. P/ith 155 analyzes of HM from coal, 45 from ash, 165 from gravel and 30 from soil, we perform analysis of horizontal and vertical distribution of HM and comparative analysis. B/hat interests us as ...
    ... II and II coal layers; as well as from the ashes after burning the same samples. A total of 155 samples were taken from coal and 45 from 179 ash. A total of 22 chemical elements were analyzed. Here is an overview of three. It can be concluded that there is a certain lateral zonation of the d ...

  • 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

  • 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 ...