Претрага
607 items
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Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules
The stability analysis of homogeneous rock slope following the Hoek–Brown failure criterion under the hypothesis of different flow rules is performed based on limit equilibrium and finite element methods. The applied failure criterion is the generalized Hoek–Brown that can be introduced as a shear/normal function in analysis applying different flow rules. The results are compared with those obtained by the application of equivalent shear strength parameters of the Mohr–Coulomb criterion, considering that this is still the most widely used ...Kružna klizna površ, Huk-Braunov kriterijum loma, Kriterijum popuštanja, Smičuća/normalna funkcija, Nivo napona, Verovatnoća i parametarska analizaSvetlana Melentijević, Zoran Berisavljević, Dušan Berisavljević, Claudio Olalla Marañón . "Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules" in Bulletin of Engineering Geology and the Environment , Springer (2024). https://doi.org/10.1007/s10064-024-03667-0
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Modeliranje disperzije dimnih gasova iz termoelektrane ,, Nikola Tesla”
Milica Kostić (2024)Termoelektrane na ugalj, iako značajan izvor električne energije, predstavljaju veliki izazov zbog zagađenja koje uzrokuju. Glavni uzrok zagađenja je neumerena ljudska potreba za energijom i resursima, što dovodi do emisije različitih zagađivača u atmosferu, uključujući okside ugljenika, sumpora, azota, kao i lebdeće čestice i toksine. Ove emisije imaju negativan uticaj na kvalitet vazduha, zdravlje ljudi i životnu sredinu. Procena uticaja termoelektrana na ugalj na životnu sredinu je zakonska obaveza i ključna za smanjenje tih negativnih efekata. Ovaj dokument analizira potencijalne ...... J_ _= +> . — 2 3 — — — — — — — 5, | . . , — — — — K c ı ı } : | | H“H H R G G Č O G R G J d U 8 B j g q u d u u d i r ć đ d u U ( J u EEE :1 | M u V g d W 3 1 d 3 S M V H W 3 A O N u V g d W 3 2 3 G Slika 6.3. Srednje mesečne vrednosti relativne važnosti vazduha ...
... ce oOjaBe MOJH HnHuHH mojlalH BC3aHH 3a JOOHjaHbe aKkajIĆMCKOT 3BaHba, KaO IITO Cy HME H Hpe3HMe, rojuHHa H MecTO poljetba H naTyM ojiOpaHe pajta. OBH JHHHH MOJalH MOTy Cc OOjaBHTH Yy cCJeKTpOHCKOM KaTamory H y nyOmHKanmHjaMa Pynapcko-reonomikor (pakyanrera. 17.09.2024. 'Y Beorpajny, Ilornuc ...
... JHcTpHOyuH|y H jaBHo caonurraBakbe Jena, H nipepa;te, ako ce HaBeJle HMe ayropa Ha HauHH ojipeljeH oji crpaHe ayropa HH JnaBaorma JIHIICHIIC, daK H y KOMepiHjanHe cBpxec. OBo je Hajca1o0o/HHja OJI CBHX JIHIICHIH. AyTopcrTBO — HeKoMepuuHja.Ho. /loxBojbaBaTe yMHoxaBaMe, HHcTpHOynu|y H |aBHO caommrraBakbe ...Milica Kostić. Modeliranje disperzije dimnih gasova iz termoelektrane ,, Nikola Tesla”, 2024
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Savremeni pristup rešavanja problema industrijskog otpada
Mariја Bošković (2024)Rad ukazuje na savremene metode rešavanja problema industrijskog otpada, sa posebnim fokusom na pećnu prašinu koja nastaje tokom metalurških procesa, poput proizvodnje čelika u elektrolučnim pećima. U radu se detaljno razmatra hemijski sastav pećne prašine, koja sadrži teške metale poput cinka, olova i kadmijuma, i naglašavaju ekološki izazovi koje predstavlja njeno zbrinjavanje. Takođe, analiziraju se metode tretmana i valorizacije pećne prašine, uključujući pirometalurške i hidrometalurške procese, pri čemu je poseban akcenat stavljen na reciklažu cinka iz pećne prašine. Dalje, ...... JIHCTpHOynHjy H jaBHO caormrTaBakhbe JIea, H ripepajie, aKO Ce HaBeJIC HME ayTOpa Ha HauuHH OJIpebeH oJ crpaHe ayropa H naBaona JIHIIeHIIe, MaK H y KOMCpIHJaJIHe CBpXc. OBo je Hajc-1000/HHja OJI CBHX JIHITCHIH. AyTOpcTBO — HeKOMePpiIHjaJIHO. J[O3BOJbaBaTC yMHO)KaBaMbc, JHCTpHOyHMHJy H jaBHO caontrraBabb ...
... mrkor (pakynrera H JIpyrHxX BHCOKOTNHIKOJICKHX ycTaHoBa; • na cy pe3yjrraTrH KOpČKTHO HaBCJIĆHH H • a HHCaM KpriHo/ma ayropckKa rIpaBa H KopHcTHO/JIa HHTeJIČKTyaJIHy CBOJHHy JIpyrux JIa. Y Beorpany, 24.9.2024. IIornuc cryneHrTa š1 H3JABA O HCTOBETHOCTH IIITAMIIAHE H EJIEKTPOHCKE BEP3HJE ...
... 06jaBe MOjl/I JiHuHH tIOJIalniH BeC3aHH 3a HOČHjaH)e aKaJIČMCKOT 3BaMb4a, KaO ITTO Cy HMEC H HIpe3HMe, rOJHHa H MecTO pobema H JaTyM OJIOpanHe pajla. OnBH JmuHu nojaru Mory ce oOjaBHTH y eJIeČKTpOHCKOM KaTajIlory H y IyOnaHKaruijaMa Pynapcko-reomomikor (bakynrerTa. V Beorpany, 24.9.2024. IIornuc ...Mariја Bošković. Savremeni pristup rešavanja problema industrijskog otpada, 2024
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BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties
Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition... magnetoelectric coupling, in single-phase BaTiOs-BiFeOy system. J. Appl. Phys. 2013, 113, 144101. [CrossRef] Patil, D.; Kim, J.-H.; Chai, Y.S.; Nam, J.-H.; Cho, J.-H.; Kim, B.-I.; Kim, K.H. Large Longitudinal Magnetoelectric Coupling, in NiFe>»Oa-BaTiOy Laminates. Appl. Phys. Express 2011, 4, 73001 ...
... 20 18|- 16| 144| s | —— ~ Ž 12 - Pl J·\–T··J–r–n–w?–r·)?–«_»–&i%,_ —H;\Jf , 10[ —— BaTiOJNiFe,O, R i s= s . i —c— — BaTiO„/ZnFe,O, a | —— BaTiO,„Ni, Zn,.Fe,O, \·“\ 4l 2|- -a yO OO \ o \HŽ·;·C«_–()–(A')–(H OO Oy-C—CxoO| 0 100 200 300 400 500 600 t["C] 20 . LAA 1300 •C 16| c ...
... Zhou, L.; Cao, H.; Cruz, C.; Yang, J.; Dai, J.; Yin, Y.; Yuan, Z.; Zhang, S.; et al. Observation of Magnetoelectric Multiferroicity in a Cubic Perovskite System: LaMnaCraOy. Phys. Rev. Lett. 2015, 115, 87601. [CrossRef] [PubMed] 14. Takahashi, Y.; Shimano, R.; Kaneko, Y.; Murakawa, H.; Tokura, Y. ...Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković. "BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties" in Inorganics, MDPI AG (2023). https://doi.org/10.3390/inorganics11020051
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Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit
Sanja Bajić, Dragoljub Bajić, Branko Glušćević, Radmila Gaćina. "Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit" in 9th International Conference Mining and Environmental protection MEP, 24 – 27 May 2023, Sokobanja, Serbia , Belgrade : University of Belgrade-Faculty of mining and geology (2023)
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Mineragenija i potencijalnost karbonatnih sirovina rudnog reona Bjelopavlića (Crna Gora)
Darko M. Božović (2016-09-28)Karbonatne sirovine, obzirom na geološku građu Crne Gore predstavljaju jednu od najznačajnijih nemetaličnih mineralnih sirovina. U Crnoj Gori postoje brojna leţišta karbonatnih sirovina (arhitektonsko - građevinskog i tehničko - građevinskog kamena) koja su istraţena ili su u eksploataciji, među kojima rudni reon Bjelopavlića zauzima najznačajnije mjesto.Dosadašnja istraţivanja karbonatnih sirovina na ovom području imala su, međutim, prevashodno uzak istraţivački cilj, utvrđivanje rezervi arhitektonsko - građevinskog i tehničko - građevinskog kamena određenog leţišta, ili preliminarna ispitivanja kvaliteta krečnjaka u njima, sa ...karbonatne mineralne sirovine, arhitektonsko - građevinski kamen, tehničko - građevinski kamen, karbonatna punila, rudni reon Bjelopavlića, potencijalnost.... 3 7 ,7 4 F e O / H K L -1 / 2 2 ,4 9 7 4 ,5 3 6 ,6 2 0 ,1 1 0 ,2 4 1 6 ,0 1 F e O / H K L -1 / 3 1 ,5 5 7 0 ,6 5 1 0 ,7 8 1 7 ,0 3 F e O / H K L -1 / 4 1 ,4 0 ...
... 2 0 ,4 7 F e O / H K L -1 / 5 1 ,1 1 4 6 ,5 8 1 7 ,1 2 3 5 ,1 9 F e O / H K L -1 / 5 0 ,9 9 4 9 ,0 7 1 9 ,6 6 3 0 ,2 7 F e O / H K L -1 / 6 1 ,1 2 6 ...
... 1 9 ,1 7 F e O / H K L -5 / 1 3 ,5 8 1 ,2 4 7 7 ,2 1 0 ,4 8 3 ,2 8 0 ,2 0 1 4 ,0 2 F e O / H K L -5 / 2 2 ,9 3 8 2 ,0 2 7 ,6 7 7 ,3 8 F e O / H K L -5 / 3 4 ,5 ...Darko M. Božović. "Mineragenija i potencijalnost karbonatnih sirovina rudnog reona Bjelopavlića (Crna Gora)" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-09-28)
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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)... coal properties on HulunBuir lignite pyrolysis. Fuel Process. Technol. 2017, 156, 415–420. [CrossRef] 53. Hosokai, S.; Matsuoka, K.; Kuramoto, K.; Suzuki, Y. Modification of Dulong’s formula to estimate heating value of gas, liquid and solid fuels. Fuel Process. Technol. 2016, 152, 399–405. [CrossRef] ...
... 116.2 × mass proportion of H + 6.3 x mass proportion of N + 10.5 x mass proportion of S − 11.1 × mass proportion of O [40,56]; Qg8 = 971 + 323.6 × %C + 711 × %H [57]; Qg9 = (145.44 × %C + 620.28 × %H + 40.5 × %S − 77.54 x%O)/0.429923 [53,55]; Qg10 = (151.2 × %C + 499.77 × %H + 45 ×%S − 47.7 × %O + 27 ...
... of C + 84.9 × (mass proportion of H − mass proportion of O/8)— 0.62 [53]; Qn2 = 34.1 × mass proportion of C + 121.4 × mass proportion of H − 15.3 × mass proportion of O + 10.5 × mass proportion of S [53]; Qn3 = 33.9 × mass proportion of C + 121.5 × mass proportion of H − 12.7 × mass proportion of O + 9 ...Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović. "Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal" in Polymers, MDPI AG (2021). https://doi.org/10.3390/polym13050759
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A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers
Effectiveness evaluation is one of the basic components of engineering asset management and maintenance engineering in general. Effectiveness is an overall concept representing a measurement of quality of service level for the analyzed engineering system. This concept contains a series of partial indicators relating to time in operation and time for maintenance activities, as well as functional properties of the system. This article describes the analysis and structuring of partial indicators, as well as the development of a model ...Miloš Tanasijević, Predrag Jovančić, Dejan Ivezić, Uglješa Bugarić, Radiša Đurić. "A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers" in International Journal of Industrial Engineering: Theory, Applications and Practice (2019)
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Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content
Nina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović (2019)Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped ...Sol-gel synthesis, Doped titania nanopowders, XRPD, Raman spectroscopy, Adsorption and photocatalytic degradation, Psychiatric drugsNina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović. "Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content" in Journal of Sol-Gel Science and Technology, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s10971-019-04925-4
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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... degradation. Decarboxylation and decarbonylation result in lower O/C and higher H/C, dehydrogenation in lower H/C and demethanization in lower H/C and higher O/C. Evolution of other volatile compounds also affect O/C and H/C. The largest deviation from the linear fit is found for CS180h and PW700g ...
... hydrothermal carbonization at 180 "C for typically 8-12 h. M200h was produced by hydrothermal carbonization of Mis- canthus x giganteus biomass at 200 "C by Schlitt GmbH (Antrifttal-Ohmes, Germany) using HTC at 200 'C for typically 4-8 h. Other materials. Sand F36 with 97% of the material having ...
... 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 a 50/1 solution/char ratio) until the filtrates had an electrical conductivity < 10 HS /cm. Finally, the samples were dried for > 60 h at 50 'C ...Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann. "Surface functional groups and degree of carbonization of selected chars from different processes and feedstock" in PLOS ONE (2022). https://doi.org/10.1371/journal.pone.0277365
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P-T analiza RMU Bitola – krupne klase
Nemanja Dobrosavljević (2024)Cilj ovog diplomskog rada je bio ispitivanje mogućnosti i tehnologije čišćenjauglja, kao i predstaviti rezultate pliva – tone analize koja ima za cilj ocenu mogućnosti čišćenja uglja - krupnih klasa posmatranog uzorka. Da bi se ispitivanje i analiza mogućnosti čišćenja rovnog uglja u REK Bitola uspešno priveli kraju, moralo se uraditi uzorkovanje reprezentativnog uzorka iz koga se potom izdvaja prvi deo koji služi za određivanje sadržaja vlage. Pored tog dela iz uzorka se izdvaja i drugi njegov deo koji će ...ugalj, lignit, Bitola, PT analiza, pliva-tone analiza, čišćenje uglja, suvi ugalj, vlažan ugalj, pepeo, donja toplotna moć, čist ugalj, jalovina, bilans... pc3yjnrTaTrH KODCKTHO HaBC/JICHH H • a HHCaM KpimHo/ma ayTopcka npaBa H KopHcTHO/Ja HHTCJIČKTyaJIHy CBOjJHHy JIpyrHx Jmuua. y Beorpaay, _C. 9. 2274. O60pasaij 2 H3JABA O HCTOBETHOCTH IIITAMIIAHE H EJIEKTPOHCKE BEP3HJE 3ABPIIIHOT PAJIA MHwe (HMe poziiTeJba) H rpe3HMe cTy/leHTa u·ew AbA [ roivM ...
... ce OOjaBe MojH nHuHH mo/lalnH Be3aHH 3a JoOHjambe akaJieČMCKOT 3BaMba, KaO IIITO Cy HMČC H TIpC3HMC, rOJHHa H MCCTO pobjePba H JlaTyM O/1GpaHc pajta. OBH nuHH moamM MOTy Ce OOjaBMTH y CJIČKTpOHCKOM KaTajlOry H y myOnmMKamujaMa Pynapcko-reojtoniKkor (bakyurrera. Y Beorpajny, 6 %· : ]297„ lf O6pasau ...
... JuHcTpHOynHjy H jaBHo caontmrraBalbe Jlena, H npepajie, ako ce HaBe/te HMe ayTopa Ha HauHH O/IpebeH ol crpaHe ayTopa HH naBaonma JiHIeHIIC, uak H y KOMCpLHHJjaJIHC CBpXc. OBo jc Hajca1o6o/iHHja OJ CBHX JIHILCHLH. AyTopcrBo — HeKoMepilijajno. Jlo3BoJbaBaTe yMHo;KaBame, JHCTpHOyanHjy H jaBHO caonmraBalbe ...Nemanja Dobrosavljević. P-T analiza RMU Bitola – krupne klase, 2024
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Optimizacija vodosnabdevanja podzemnim vodama u Srbiji
Dušan Polomčić, Zoran Stevanović, Petar Dokmanović, Vesna Ristić-Vakanjac, Bojan Hajdin, Saša Milanović, Dragoljub Bajić (2012)... 08 T zah h 6 3/ 3/s. Ia za a S a Sa a a a a za p a za a h . a za a a h a z a a . U z a a az a h a a a a a s sa a a sa a a h s s a a a a a a a h a a sa za a a a a a. Za az a a h, s a a a h a h a . a a h a a a a ...Dušan Polomčić, Zoran Stevanović, Petar Dokmanović, Vesna Ristić-Vakanjac, Bojan Hajdin, Saša Milanović, Dragoljub Bajić. "Optimizacija vodosnabdevanja podzemnim vodama u Srbiji" in Zbornik radova XIV srpskog simpozijuma o hidrogeologiji sa međunarodnim učešćem, Zlatibor, 17-20. maj 2012. godine , Beograd : Rudarsko-geološki fakultet (2012)
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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... Technology M. Mihailescu, M. Monkenbusch, H. Endo, J. Allgaier, G. Gompper, J. Stellbrink, D. Richter, B. Jakobs, T. Sott- manmn, B. Farago, J. Chem. Phys. 115 (2001) 9563-9577 A. Kabalnov, U. Olsson, H. Wennerstrom, Langmuir 10 (1994) 2159-2169 C. Frank, H. Frielinghaus, J. Allgaier, D. Richter ...
... Surfactants and polymers in aqueous solution, John Wiley & Sons, Chichester, 2003 A. Kabalnov, U. Olsson, K. Thuresson, H. Wennerstrom, Langmuir 10 (1994) 4509-4513 H. Endo, J. Allgaier, G. Gompper, B. Jakobs, M. Monken- busch, D. Richter, T. Sottmann, R. Strey, Phys. Rev. Lett. 85 (2000) ...
... M. Brandt, B. Jakobs, T. Sottmann, in Studies in Surface Science and Catalysis, Vol. 132, Y. Iwasawa, N. Oyama, H. Kunieda (Eds.), Elsevier Science, Amsterdam, 2001, pp. 39-44 H. Endo, M. Mihailescu, M. Monkenbusch, J. Allgaier, G. Gompper, D. Richter, B. Jakobs, T. Sottmann, R. Strey, l. ...Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic. "The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system" in Chemical Industry and Chemical Engineering Quarterly, National Library of Serbia (2016). https://doi.org/ 10.2298/CICEQ141105015I
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Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery
... ples and on oriented mounts in three preparations, namely: nat- ural air dried (AD), treated with ethylene glycol (EG) and heated at 550%C for 1 h (H). The mineral phases were identified using the Rigaku PDXL software and the PDF-2 database (International Centre for Diffraction Data). The chemical ...
... (AD), solvated with ethylene glycol (EG) and heated at 550"C (H). Clay Minerals Sample CIMx Fig. 3. The SEM and EDX analysis of the investigated CIMx and CIBd samples. XRD - sample CC C - calcite Q- quartz c || š 5 H rl -a : s responsible for the high LOI (31.88%) (Milheiro ...
... Mitteilungen der Bodenkunde, 1, 4–37. Baccour H., Medhioub M., Jamoussi F. & Mhiri T. (2009) Influence of firing temperature on the ceramic properties of Triassic clays from Tunisia. Journal of Materials Processing Technology, 209, 2812–2817. Baccour H., Medhioub M., Jamoussi F., Mhiri T. & Daoud ...Maja Milošević, Biljana Đorđević, Mihovil Logar. "Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery" in Clay Minerals (2020). https://doi.org/10.1180/clm.2020.20
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Regulacija nivoa tečne faze u vertikalnim separatorima
Katarina Šoštarić (2024)Ovaj diplomski rad bavi se regulacijom nivoa tečne faze u vertikalnim separatorima u industriji nafte i gasa. U radu su istraženi različiti metodi merenja nivoa, uključujući plovke, ultrazvučne i radarske senzore. Radarski senzori su se pokazali kao najefikasniji u teškim radnim uslovima, zahvaljujući njihovoj visokoj preciznosti i pouzdanosti. Rad uključuje teoretski pregled metoda merenja nivoa, detaljno poređenje prednosti i nedostataka različitih senzora, kao i studiju slučaja implementacije radarskog senzora u vertikalnom separatoru. Analiza rezultata i preporuke za buduća istraživanja ...... KOLIČINE (ZAPREMINE) tečnosti ili usitnjenog materijala V u rezervoaru – na osnovu podatka o nivou hi ı poznatog poprečnog preseka rezervoara S: V= JS(h)·h Ukoliko je poznata i gustina tečnog ili usitnjenog materijala p moguće je izračunati njegovu masu: m=V·p 2.5. Primene merenja nivoa u industriji ...
... y cnojMMy JipyrHx TMIMA, V Beorpaay, Hormuc cryAemnra 32 (Oopavay 2 M3JABA O HCTOBETHOCTH IIITAMITAHE, H EJIEKTPOHCKE BEP3HJE Š3ABPIIIHOT PAJLA MMe (ue pojiirezba) H rpe3ne cryielrra Ld];}& a (“eu:už lo\ GQH Bpoj Mnexca __?{[02 / + Crymanjeku nporpau UHMteIbe (C7000 Jtadj7e u VAC ...
... werTopa Tlornmnce cryaenra 34 Ay1opcrso. Jloxpovkasarc yvoycanarye, /JMcTpq0yajy H }anHO caonmrranaW< JIe/na, M npcpajuc, ako ce Hapejic HMe ayYopa M4 awM o/pežyeH oyji crpatic ayropa u manaoria MMIICHIC, MAK H y kOMeEpujanHe chpxe. OBO jc Hajcio60nHyja o,1 CaMX 10MHCIHIUMH. Ayropcrso — Heko ...Katarina Šoštarić. Regulacija nivoa tečne faze u vertikalnim separatorima, 2024
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Sorpcija herbicida na neorganski i organski modifikovanom prirodnom montmorionitu iz Bogovine
Lazar M. Kaluđerović (2018-01-17)fikasnost prilikom sorpcije S-metolahlora i klomazona od strane neorganskih iorganski modifikovanih montmorionita sa lokaliteta Bogovina odreĎena je metodombach adsorpcije. Uzorci montmorionita su tretirani prvo rastvorom NaCl a zatim irazličitim koncentracijama organskih kompleksa. Adsorpcione izoterme su dobijenetretiranjem uzoraka različitim koncentracijama herbicida. Detaljna mineraloškakarakterizacija uzoraka uraĎena je metodom rendgenske difrakcije. Rezultati interakcijemontmorionita sa organskim kompleksima i herbicidima dobijeni su primenomrendgenskih, optičkih, termičkih i spektroskopskih metoda.Na osnovu rezultata rendgenskih ispitivanja uzoraka, utvrĎeno je prisustvoorganskih kompleksa i herbicida u meĎuslojnom prostoru montmorionita.Montmorioniti modifikovani ...adsorpcija, montmorionit, heksadeciltrimetilamonijum bromid,feniltrimetilamonijum hlorid, S-metolahlor, klomazon... drugog derivata prikazani su na slici 16. Naročito značajni regioni za proučavanje predstvljaju spektralni region H–O–H deformacionih vibracija sorbovane vode (1600–1700 cm−1) i region O-H valentnih vibracija (3100–3700 cm−1) (He et al., 2004). Na FTIR spektru Na-montmorionita moţe se videti traka ...
... 4320–4325. Liu W., Liu H., Zheng W., Lu J. 2001. Adsorption of chloroacetanilide 435 herbicides on soil (I). Structural influence of chloroacetanilide herbicide for their adsorption on soils and its components. Journal of Environmental Sciences, 13: 37–45. 143 Liu,H. B., Xiao H. N. 2012. Investigation ...
... nakon sorpcije na površinu minerala glinovite frakcije. Izvori protona za proces protonizacije su: 1) Izmenljivi H+ ili NH4+ koji zauzimaju poloţaj izmenljivog katjona: H+— glina + B = BH+— glina NH4 +— glina + B = BH+— glina + NH3 2) Voda koja je vezana za ...Lazar M. Kaluđerović. "Sorpcija herbicida na neorganski i organski modifikovanom prirodnom montmorionitu iz Bogovine" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-01-17)
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Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite
Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...... (Figures 4, A1 and A?2). Table 2 summarizes the phases identified. The FTIR spectra of asbestos in the O-H and H»O stretching, range (3000–4000 cm !) only show narrow peaks characteristic of O-H vibrations [43]. In our case, strong and broad ~3200 and 3400 cm-! bands are dominant, which are typical ...
... other hand are rather similar, but sample d appears to be more heterogeneous. The narrow O-H stretching,; modes at ~3670 cm-! (Figure 4) are very specific and fit well with asbestos. On the contrary, the broad O-H band peaking at ~3400 cm~! with a d shoulder at 3200 cm~! is assignable to water traces ...
... WJE — Y | ___ \ 3) T T T T ı 3000 3250 3500 3750 4000 Wavenumber / cm" Figure 4. FTIR ATR spectra of samples (a-d) (see Figure 1) in the O-H/H»O spectral range; (dy) spectrum recorded on extracted asbestos fibers. Materials 2020, 13, 3597 6of18 Differences between samples are evident; ...Philippe Colomban, Aleksandar Kremenović. "Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite" in Materials, MDPI AG (2020). https://doi.org/10.3390/ma13163597
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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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Optimizacija dužine strele rotornih bagera u funkciji stabilnosti kosina i efektivnosti rada na površinskim kopovima lignita Srbije
Branko M. Petrović (2016-07-12)Rotorni bageri su mašine koje se u današnje vreme najviše primenjuju uprocesu masovne eksploatacije uglja zahvaljujući, pre svega, nizu tehničkoeksploatacionihprednosti u odnosu na druge vrste bagera. Raznovrsnirudarsko-tehnički zahtevi otkopavanja doprineli su razvoju nekoliko tipova ovihmašina, tako da svaki od njih ima svoje prednosti i nedostatke u odnosu nadrugi tip.Predmet istraživanja u disertaciji odnosi se na izbor optimalnekonstrukcije strele bagera i njene usaglašenosti sa uslovima radne sredine kojiće vladati na površinskim kopovima lignita Srbije, imajući u vidu složene usloveeksploatacije (velika ...površinski kop, parametri bloka, kapacitet, rotorni bager, strelabagera, geomehanika, stabilnost kosina, ekonomija... sledeći način: 𝑄𝑏 = 𝑄𝑡�1+𝑡𝑚𝑡𝑑 �𝑓𝑠 (bm3/h) (2.4) gde su : 𝑄𝑡 – teoretski kapacitet (rm³/h), 𝑡𝑑 – neto vreme kopanja bloka (h), 𝑡𝑚 – vreme manevrisanja tokom kopanja bloka (h), 𝑓𝑠 – faktor bubrenja iskopanog materijala. P ...
... C-700 (P.K. POLJE B) Godin a Ostvarena proizvodnja Efektivno vreme rada, h Ostvareni kapacitet Vrem. iskorišć. ηT Kapac.is korišć ηQ ηTη Q Ugalj, t Otkriv.,m3 Ugalj Otkr. Ugalj t/h Otkrivka, m3/h 1987 / 2404000 / 2352 / 1080 0.27 0.44 0.12 1988 / 3598002 / 3574 / 1006 0.42 ...
... odlikuju kratkom strelom i konstrukcijom strele od punih zidova, klase B sa rešetkastom strelom i kapacitetom do 6.000 m3/h i klase C sa rešetkastom strelom kapacitetom preko 6.000 m3/h i pretovarnim mostom. Svaki od ovih tipova bagera ima svoje prednosti i nedostatke koji se ogledaju u mogućnosti o ...Branko M. Petrović. "Optimizacija dužine strele rotornih bagera u funkciji stabilnosti kosina i efektivnosti rada na površinskim kopovima lignita Srbije" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-07-12)
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Polyhedral characteristics of the cosalite-type crystal structures
Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus. "Polyhedral characteristics of the cosalite-type crystal structures" in The Canadian Mineralogist, Mineralogical Association of Canada (2019). https://doi.org/10.3749/canmin.1900017