Претрага
862 items
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A new copper(II) arsenate, Na2Cu3(AsO3OH)4·4H2O containing discrete [Cu3O12]18− units: Synthesis, crystal structure and magnetic properties
Single crystals of the new disodium tricopper(II) tetrakis(hydrogenarsenate(V)) tetrahydrate, Na2Cu3(AsO3OH)4·4H2O were grown under hydrothermal conditions. The compound was characterized by room-temperature single-crystal X-ray diffraction, SEM-EDS analysis, Raman spectroscopy and magnetic susceptibility measurements. Na2Cu3(AsO3OH)4·4H2O represents a new layered structure-type [space group P21/c, a = 8.7089(17), b = 9.7452(19), c = 9.3353(19) Å, β = 92.63(3)°, V = 791.4(3) Å3, Z = 4]. The layers are normal to [100] and are composed of the isolated Cu3O12 units interconnected by AsO3OH coordination ...Na2Cu3(AsO3OH)4•4H2O, хидротермална синтеза, кристална структура, хидрирани хидрокси-арсенати, магнетна својстваTamara Đorđević, Ljiljana Karanović, Zvonko Jagličić. "A new copper(II) arsenate, Na2Cu3(AsO3OH)4·4H2O containing discrete [Cu3O12]18− units: Synthesis, crystal structure and magnetic properties" in Journal of Solid State Chemistry, Elsevier BV (2018). https://doi.org/10.1016/j.jssc.2018.05.024
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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, ...... vazduh-voda. Iz tih studija, proces pucanja mehurića može se podeliti na tri koraka koji dovode do formiranja dva tipa kapljica (slika 17) [7]. jet drops film drops \ Ć B • 0 e e K_ o 0 O liquid bubble cap o O N i \ o o o - KOA liquid gaS bubble a) bubble emerging b) rupture of the ...
... po mehuriću, raste kako se veličina matičnog mehurića smanjuje [7]. 40 * experimental results — Nja = 43.4 exp (-0.58dn) _ n u m b e r of ej ec te d je t dr op s pe r bu bb le (N ji e) G 0.5 bubble diameter (mm) Slika 21. Koeficijenti su izračunati regresijom iz ek ...
... vrstama elektrolu, ŠI ržaj te: Tabela 2. Sadr radovima [9] L60'%0-160' |P10'0-100'0>| eZT'0-Z60'0 | 960'0–1/0%0 9 7 0 OLE-btI #89-ZES 6E-ZC 2688 0Z6-088 9 0 0 5 0 0 8 6 1 ojdures c Stb-CO O S / — 6 9 6 6bc-L61 SOL-IZI SIS-ZSZ b 68-IS bLEI-S6 (9-09 ...Mariја Bošković. Savremeni pristup rešavanja problema industrijskog otpada, 2024
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Планирање – функција менаџмента пројекта минералне индустрије
Жељко Вучић (2024)Просторно планирање је комплексан мултидисциплинаран процес утврђивања оптималног распореда људи, добара и делатности на одређеној територији ради његове оптималне употребе. Циљ просторног планирања је распоредити и најбоље користити садржаје у простору што је неизводљиво без детаљних анализа потенцијалних, штетних агенаса на целокупно подручје и његово становнисштво. Утицај рударства на окружење вишеструко се повећао након увођења технологије површинске експлоатације минералних сировина, али и свеукупног лошег дејства на животну средину. Под појом животне средине подразумевамо природне и радом створене вредности у ...... HJOM, ČKOHOMHJOM H CKOJIOTHJOM (ŽKHBKoBHh H MuiiteHKoBHh, 2012). b. Hcropuja npocropnor njiaHupama IIpocropHo nmaHMpame MMa moceOaH 3Hauaj 3a CBaKy MOJIĆDHO OpraHM3OBaHy RnpyutTBeHy 3ajeJHHIy jep nonpuHHocuH O,1pxkaBab»>y pe/ta Ha ojpebeHoj reparopuju H oMoryhanBa 3amrrHTy Ba)KHHX JaBHHX HHTepeca ...
... NpHMCHOM IHpHHIHHIHa penurponurera H cyrcuH)uHjapHOcTH H KOHIIeI!Ta yripaBJbaPba Ha BHIIIC HHBO4, yCJIOBHO Og aHauuino rnojteJty oOaBe3a JIy)KHOCTH H IIpaBa H3MCl)y OCHOBHHX HHBO24 IIpOCTOpHOr rutaHHpatba (JTaOoBuh, 2011). b. HauuoHajiHo ripocTopHo rjianupame OcHOoBHH IIpHHIHHH OJIpokHBor pa3Boja ...
... HHBOa Oy\yhe eKcrimoaTanuHje, HHCy KOHCTATOBaHČ TIOJG3eMHČ BOJIe, TO Ce H3y3eB OOOJHHX KaHajla 3a a3anmrrHTy OJL HHTC3HBHHJHX mMajaBHHa HHCy ypaDeHHM, HHTH ce HpenpBHDajy MpyrH o0jekTH OJIBOJUbaBaMba Oy/yher IOBpIIHHCKOT KoOma. b. OcnonBHu yciuoBu ripurnpeMe u ıpepajte cipoBuHe CHpoBHHa OBOTr ...Жељко Вучић. Планирање – функција менаџмента пројекта минералне индустрије, 2024
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Анализа рада дисконтинуалног система на основу симулације утовара и транспорта целог површинског копа
Милош Јовановић (2024)У овом раду анализира се рад дисконтинуалног система утовара и транспорта на површинским коповима користећи софтверски пакет Haulsim. Циљ истраживања је побољшање ефикасности процеса транспорта и оптимизација коришћења ресурса. Симулација је спроведена за различите сценарије утовара и транспорта, укључујући варијације у броју возила, њиховој брзини, капацитету, као и рутама транспорта. Добијени резултати су показали значајне могућности за унапређење постојећих процедура и смањење трошкова. Дисконтинуални системи су сложени и захтевају пажљиву анализу како би се постигла максимална продуктивност и смањење ...... KOJH Ce MO)KE OJIpe/iHTH H3 OJIHOCa: n = 60/t, t. — Tpajabbe IHKJIyCa t =t y+to+ti+te rne je: tk— BpČMe KOHIaĐ52, CeK. to— BpeČMĆ OKpeTaM5a ITyHC KaILIIIHKEe, CEK. ti— BpeMĆ HCTOB2AP42 KaIIIHKE,CECK. to' — BpDEMe OKpeTaM5a IIpa3He KamIHKe,CeK. 17 AHajmina pajta JUHCKOHTHHyaJIHOr CHCTEMA ...
... Ha OCHOBy CHMyJalHje yroBapa H TpaHcnopTa IIeJIOr IIOBpHIHHCKOT KOIa Bpewme nHkartyca KaMHoHa (7«) pauyHa ce no cejreheM o0pacity: To =ta +t, +tmu t+tni +ti + te [s] rne je: fu — BDeMe yTOBapa KaMHOHA, (5S) fy — BDČMC BO)KEbEĆ KaMHOHA (TTIyHor H Ipa3Hor), (s) tinu — BDEMeE MaHeBpHCahMba IIpH ...
... 3aBHcu OJ Opoja KaniKka noTpeOMx 3a HyMeMC caH)UyKa KaMHOHa H BpeMecHa TpajaMba IHMHKJIyCa KaIHIHKC HDHMCH5cCHOT yTOBapHOor cCpejicTBa. tu =n't.o+ty Te Je: te— HHKJIyC KamIHKe Oarepa, s n — norpe0OHu 0poj KanriKa, ty— BpeMe 3aMeCHC KaMHOHA, S BpeMe B0;KIbe KaMH0H12: JI6JIH Ce Ha BDEMC BO;KHC ...Милош Јовановић. Анализа рада дисконтинуалног система на основу симулације утовара и транспорта целог површинског копа, 2024
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Coal homogenization stockyard sizing “Tamnava – Zapad” case study
... pit filling takes 18 to 30 hours (net), meaning a gross value of 1 to 2 days, while emptying takes twice as long. The variability of pile size moves this rule, because filling a shorter pile will take a shorter amount of time, and conversely, a longer pile takes longer to fill. Of course, planning ...
... presents considerations relating to coal stockyard sizing at the "Tamnava - Zapad" pit. The strata stacking method was selected. Approximately 50 layers need to be stacked for the entire deposit; however, depending on quality the number of layers will be variable, from 16 to over 150. The number of piles ...
... run-of-mine coal or other ore or material. In order to restrict the time necessary for homogenization activities, stockyards are divided into smaller units, piles, used for homogenization of coal delivered in a relatively short period of time. Viewed on stockyard level, each pile contains coal ...Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer. "Coal homogenization stockyard sizing “Tamnava – Zapad” case study" in Proceedings of 13th International Symposium Continuous Surface Mining, ISCSM 2016, / (2016)
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The different approaches in seismic stratigraphy interpretation
Dejan Radivojević (2018)U tekstu su prikazana dva osnovna pristupa u seizmostratigrafskoj interpretaciji. Prvi kao polaznu osnovu ima seizmičke sekcije, čija se interpretacija u kasnijoj fazi koreliše sa bušotinskim podacima. Drugi u prvoj fazi analizira podatke dobijene dubokim bušenjem koji se kasnije korelišu sa seizmičkim sekcijama. Prikazan je hronološki redosled i objašnjen postupak pri seizmostratigrafskoj interpretaciji oba pristupa. Ovakav način interpretacije omogućio je naftnim kompanijama detaljnije i preciznije sagledavanje geoloških odnosa, smanjenje rizika istraživanja i racionalnije projektovanje razradnih bušotina.seizmostratigrafija, istraživanje nafte i gasa, karakteristične seizmičke sekvence, seiz-mofacijalna analiza... 1859-1867, Houston, Texas, 1979. [9] Sangree, J. B. & Widmer, J. M, Seismic Stratigraphy and global changes in sea level Part 9: seismic interpretation of clastic depositional facies. In: Pay- ton (Eds.), Seismic Stratigraphy: Application to Hy- drocarbon Exploration, AAPG-Mem., 26, p 165-184 ...
... reflektovanja je: R 1122 1122 1,2 VV VV (1) Vi - brzina prostiranja talasa u i-tom sloju i - gustina (zapreminska masa) u i-tom sloju i Vi - akustična impedanca i-tog sloja Kada su u bušotini mereni i akustični karotaž i karotaž gustine, moguće je sračunati akustične ...
... dvodimenzionalno kartiranje seizmičkih facija po- znatu kao „A, B, C tehnika“. Ova tehnika se zasniva na opservaciji tri osobenosti svakog seizmičkog paketa: završetaka na povlatnoj granici (A), završetaka na po- dinskoj granici (B) i unutrašnjoj konfiguraciji refle- ksija (C) (slika 4). Slika ...Dejan Radivojević. "The different approaches in seismic stratigraphy interpretation" in Tehnika – rudarstvo, geologija i metalurgija, Savez inženjera i tehničara Srbije, Beograd (2018). https://doi.org/10.5937/tehnika1802211R
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Crystal structure of K3EuSi2O7
alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu... Eu2O3 and SiO2 in a molar ratio of 1:4 was added to 1 g of KF. The resulting mixture was homogenized in an agate mortar, transferred to a platinum crucible covered with a platinum lid and placed in a resistance-heated furnace. The mixture was heated to 1173 K at a rate of 200 K/h and kept for 10 h ...
... temperature was lowered to 973 K at a rate of 2 K/h and then the furnace was switched off. After cooling to room temperature, the resulting material was manually removed from the crucible, washed with distilled water and dried in air. Bow-tie aggregate colorless crystals up to 300 μm size embedded ...
... can be attributed to the environment of the Eu1O6 octahedron. All oxygen atoms from Eu1O6 octahedron are common to all adjacent polyhedra around the K1 and K2 atoms for which BVS shows slightly undersaturated values. This means that slightly deviating bonds are formed in order to satisfy the local ...Sabina Kovač, Predrag Dabić, Aleksandar Kremenović. "Crystal structure of K3EuSi2O7" in Journal of the Serbian Chemical Society, National Library of Serbia (2021). https://doi.org/10.2298/JSC210218026K
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Is the Sava-Vardar zone a remnant of an Upper Cretaceous ocen? Pro et contra
... godynamic events is closely related to the accurate understanding of the origin and evolution of the Sava-Vardar Zone (SVZ) [1]. This zone stretcthes WNW-ESE from Zagreb to Belgrade and then N-S from Belgrade to Thessaloniki. It is composed of Upper Cretaceous to Palaeogene flysch-like sediments ...
... Figenschuh, B., Matenco, L., Schefer, S., Schuster, R., ... & Ustaszewski, K. (2008). The Alpine-Carpathian-Dinaridic orogenic system: correlation and evolution of tectonic units. Swiss Journal of Geosciences, 101, 139-183. 3. Prelević, D., Wehrheim, S., Reutter, M., Romer, R. L., Boev, B., Božović ...
... believed to be true ophiolites that originated at the ocean floor. The most ophiolite-like rocks occur at North Kozara in the form of Campanian pillow basalts and sheeted dyke dolerites of tholeiitic composition. In terms of rock petrography, these rocks are indeed quite similar to adjacent ...Vladica Cvetković, Dejan Prelević, Ana Mladenović. "Is the Sava-Vardar zone a remnant of an Upper Cretaceous ocen? Pro et contra" in Fifth Congress of Geologists of the Republic of North Macedonia, Ohrid, 2024, Macedonian Geological Society (2024)
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A new polymorph of Ba(AsO3OH): Synthesis, crystal structure and vibrational spectra
Tamara Đorđević, Ljiljana Karanović (2010)A new monoclinic polymorph of Ba(AsO3OH) was synthesized under hydrothermal conditions. It represents a previously unknown structure type. Its crystal structure was determined from a racemic twin using single-crystal X-ray diffraction data collected at 120 and 293 K [space group P21, a=7.2149(14)/7.2370(2), b=7.7028(15)/7.7133(2), c=21.7385(43)/21.8079(5) Å, β=95.95(3)/96.073(1)1, V=1201.6(4)/1210.51(5) Å3, Z=12]. The crystal structure of P21-Ba(AsO3OH) has a layered character and is built up of four types of regularly alternating layers parallel to (0 0 1). Every AsO3OH tetrahedron is chelating to two Ba atoms and ...Ba(AsO3OH), хидротермална синтеза, структурна анализа монокристала, Раманска спектроскопија, инфрацрвена спектроскопија, водоничне везе, хидрогенарсенати земноалкалних металаTamara Đorđević, Ljiljana Karanović. "A new polymorph of Ba(AsO3OH): Synthesis, crystal structure and vibrational spectra" in Journal of Solid State Chemistry, Elsevier BV (2010). https://doi.org/10.1016/j.jssc.2010.09.027
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Utvrđivanje Bondovog radnog indeksa Pb-Cu-Zn rude rudnika Rudnik
Jovana Jović (2024)Završni rad sa temom ,,Utvrđivanje Bondovog radnog indeksa Pb-Cu-Zn rude rudnika Rudnik” sastoji se iz opšteg i specijalnog dela. OPŠTI DEO sadrži: U opštem delu dato je: Uvod, Geografski položaj i istorijski razvoj rudnika "Rudnik", kratak prikaz geologije ležišta i eksploatacije rude kao i opis tehnološkog procesa flotacije rudnika “Rudnik”. SPECIJALNI DEO sadrži:U specijalnom delu dato je:Cilj istraživanja, teorijske osnove usitnjavanja, Bondov radni indeks, metode ispitivanja uzoraka, uzorkovanje i obrada uzorka; Metode ispitivanja; Rezultati ispitivanja po standardnom Bondovom postupku i po ...Bondov radni indeks, standardni postupak, skraćeni postupak, ruda olova, bakra i cinka, rudnik „Rudnik“... Proces mlevenja počinje transportom rude iz bunkera definitivno izdrobljene rude, i to trakastim dodavačem pa potom transportnom trakom poz. 20 (slika 9), kapaciteta Q = 39,29 t/h i dužine L = 17,0 m. Širina trake je B = 650 mm. Traku pokreće elektromotor snage N = 5, 5 kW, pri čemu se traka kreće ...
... dovodi u kondicioner. To je uređaj za kondicioniranje pulpe pre ulaska iste u flotacijske mašine. U kondicionere se dodaju odgovarajući flotacijski reagensi, u zavisnosti od toga koji metal izdvajamo. U procesu flotiranja rude rudnika „Rudnik“ postoje tri kondicionera 25 i to za kondicioniranje ...
... iz serije izdvajaju se uske klase krupnoće, koje su ograničene dimenzijama otvora sita (di) i (d>), označava se sa (-di + d»>, di > d»). To znači da Jje ta klasa krupnoće sitnija od dimenzije (di) ı krupnija od dimenzije (d»). Krupnoća najvećeg zrna u uzorku označava se sa (dmax). Krupnoća najsitnije ...Jovana Jović. Utvrđivanje Bondovog radnog indeksa Pb-Cu-Zn rude rudnika Rudnik, 2024
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Ionothermal synthesis and crystal structure of a new organic–inorganic hybrid compound:catena-poly[bis(1-ethyl-3-methylimidazolium) [hepta-μ-bromido-pentacuprate(I)]]
A new organic-inorganic hybrid compound, catena-poly[bis(1-ethyl-3-methylimidazolium) [μ5-bromido-tri-μ3-bromido-tri-μ2-bromido-pentacuprate(I)]], {(C6H11N2)2[Cu5Br7]}n, has been obtained under ionothermal conditions from a reaction mixture containing Ba(OH)2•8H O, Cu(OH)2•2H2O, As2O5 , 1-ethyl-3-methylimidazolium bromide and distilled water. The crystal structure consists of complex [Cu5Br7]2- anions arranged in sinusoidal {[Cu5Br7]2-}n chains running along the a axis, which are surrounded by 1-ethyl-3-methylimidazolium cations. Three of the five unique Br atoms and one of the three Cu(I) atoms occupy special positions with half-occupancy (a mirror plane perpendicular to the b ...кристална структура, органско-неорганско хибридно једињење, бакар(I) бромид, јонотермна синтеза, 1-етил-3-метилимидазолијум бромид, Cu•••Cu интеракцијеLjiljana Karanović, Dejan Poleti, Tamara Đorđević. "Ionothermal synthesis and crystal structure of a new organic–inorganic hybrid compound:catena-poly[bis(1-ethyl-3-methylimidazolium) [hepta-μ-bromido-pentacuprate(I)]]" in Acta Crystallographica Section C Structural Chemistry, International Union of Crystallography (IUCr) (2014). https://doi.org/10.1107/S205322961402172X
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Могућности и значај коришћења појава природног лековитог фактора на територији Србије у дермокозметици
Сава Вуковић (2024)Сведоци смо да је данас потражња усмерена ка ефикасним производима које нуди дермокозметика јер употреба дермокозметичких производа носи много мање ризике и има далеко мањи токсични потенцијал у односу на дерматолошке лекове. Важно место у дермокозметици заузимају појаве природног лековитог фактора - термалне воде и лековита блата. Термалне / термоминералне воде садрже макро-, микро- и фармаколошко-терапеутске елементе, тј. eлементе у траговима који су доказали своју ефикасност у нези и заштити коже и у побољшању одређених кожних поремећаја. То се ...природни лековити фактор, термоминералне воде, лековито блато, дермокозметика, Луковска бања, Бања Риђица... OuminoBuh B. a Jlasah M. (1988): EaaGopar o peaepBaMa TepMOMHHePaJIHHX BOJIA JIyKoBcke Oame, oJ Pynapcko-reo:momrkor pakyanrera, Beorpajt 48. OuminoBuh B. m JlasaMh M. (1990): MapBemrraj O H3BCJIĆHHM TCOJIOHIKHM H XHJIDOTeCOJIOIIIKHM HcTpa;xKMBaMbHMa y 3OHH JIyKoBcKe Oame y ToKy 1990. Toj., Đon ...
... KapoTeH - HpOBHTaMHH A, BHTaMHHH B rpynme - BI (rwaMuH), 52 (pu6oQ)nmaBuHH), 53 (HHamuuH), 56, 57 (OHoTHH), 59 ( oonHa KHcenuHa) H B512, BHTaMHH [], BHraMHH K - MuHepanH — CKOpO CBH MHHCPpaJIH HCOTMIXOJIHH 34 Jby}ICKM OpraHM3aM TIpHCyTHH Cy TOKOM pacTa cHHpyHHc, Te HMa 23 myTa BHHIC TBO)XDa OJL ...
... JepMOKO3MeTHuku ripenaparH oOBHuHO HM4aJy MHHHMAaJIHCTHUKH JH3aJH H OHO ITTO Je HaJBa)KHHJe — CaMH IIpOH3BOJUH Cy Oc3 MHPHCca, Te Cajlp)*Xe MHHHMAaJIaH Opoj aJtepreHa. Va3 TO, nepMOKo3sMeTHKa mocce/iyje H Npyre KapaKTepHCTHKe HO KOJHMA CC pa3nakyJe oJ TpajiiriMOHaJIHHX KO3MeTHUKHX IIpenapaTa, Kao IITO ...Сава Вуковић. Могућности и значај коришћења појава природног лековитог фактора на територији Србије у дермокозметици, 2024
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Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)
Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeLjiljana Vasić, Saša Milanović, Anita Puskás-Preszner, Laszlo Palcsu. "Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)" in Environmental Earth Sciences, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s12665-020-08910-x
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Procena poroznosti i litologije na osnovu geofizičkih merenja u severoistočnoj Rumuniji
Manja Grifatong (2024)Geofizička karotažna merenja imaju važnu ulogu u određivanju fizičkih i geoloških svojstava delova Zemljine kore. Cilj ovog rada je da se prikaže procena poroznosti i litoloških karakteristika formacije na osnovu rezultata geofizičkih karotažnih merenja. Na osnovu dostupnih podataka izrađeni su dijagrami promene poroznosti sa dubinom i krosplot dijagrami neutronska poroznost – srednja gustina za dve bušotine koje se nalaze na Moldavskoj platformi, u severoistočnoj Rumuniji. Na osnovu ovih dijagrama određene su zone povećane poroznosti i litologija formacija kroz koje ...... Novi Sad, 201-203. 5. Niculescu, B., M., Andrei, G., Mocanu, V., Pene, C., 2017. Gas Accumulations in Shallow-depth Sarmatian Reservoirs from Moldavian Platform (Romania), 79th EAGE Conference & Exibition, Paris, France, 12-15 June 2017, Tu C2 04. 6. Niculescu, B., M., Andrei, G., 2018. Geophysical ...
... SGEM, 447-454. 7. Niculescu, B., M., Andrei, G., 2016. Principal component analysis as a tool for enhanced well log interpretation, Rev. Roum. GEOPHYSIQUE, 60, 49-61. 8. Niculescu, B., M., Ciupercž, C., Andrei, G., 2019. Application of borehole electrical imaging to the study of Sarmatian deposits ...
... neutronske poroznosti i prirodne radioaktivnosti. Ovo odgovara prelazu ka anhidritima badenske starosti. GR [API] 27.747 to 50 50 to 70 70 to 90 90 to 110 110 to 130 130 to 141 0 02 0.4 0.6 . [dec] Slika 16. Krosplot dijagram srednja gustina – neutronska poroznost za bušotinu W2: grupa ...Manja Grifatong. Procena poroznosti i litologije na osnovu geofizičkih merenja u severoistočnoj Rumuniji, 2024
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Analiza rada električnih centrifugalnih pumpi
Milica Stanojević (2024)Ovaj rad analizira rad električne centrifugalne pumpe (ESP) u naftnoj industriji, sa fokusom na problem taloženja kamenca (karbonatnih naslaga) unutar sistema. Električne centrifugalne pumpe (ESP) predstavljaju srce mnogih naftnih bušotina. Njihova visoka pouzdanost i sposobnost rada u zahtevnim uslovima čine ih neophodnim za stabilnu i kontinuiranu proizvodnju.Senzori igraju ključnu ulogu u praćenju rada ESP sistema i detekciji ranih znakova taloženja kamenca. Problem taloženja kamenca je izuzetno značajan, jer može dovesti do smanjenja efikasnosti pumpe, povećanja troškova održavanja, i dugoročnih zastoja ...... sekcije (Zelić & Čikeš, 2006) S obzirom na konstrukciju razlikuju se dva tipa zaptivne sekcije a to su sekcija podeljena pregradama tJ. „lavirint“ sekcija, te sekcija s elastomernim mehom (Fetoui, 2017 b). 16 Analiza rada električnih centifugalnih pumpi 3.2.2.1 Sekcija podeljena pregradama ...
... ove sekcije zavisi od veličine motora, uslovima u bušotini te o radnim uslovima. Glavna prednost ove sekcije u odnosu na sekciju podeljenu pregradama je u tome što može nesmetano funkcionisati pri bilo kojem otklonu bušotine (Fetoui, 2017 b). Slika 3.2.3.2 prikazuje sekciju gdje su primenjene pregrade ...
... stalnim magnetom Efikasnost pri nazivnoj snazi Faktor snage Radna struja, B MSSM Struja praznog hoda BiM Slika 3.2.1.1 Poređenje MSSM ı IM (Bafghi & Vahedi, 2018). 3.2.1.2 Stator Stator je nepokretni deo motora te je ujedno i središte električnog polja (slika 3.2.3). Stator čine jezgra statora ...Milica Stanojević . Analiza rada električnih centrifugalnih pumpi, 2024
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Quantitative landslide risk assessment in the city of Tuzla
In the climate-changing conditions, geological environment interacts more dramatically with the urban fabric than before. The urbanization is expansive and more aggressive than before, but so are the weather extremes and long-term climate trends. In effect, many processes which can be triggered by either side, nature or engineering, are becoming more pervasive than before, and such is the case with landslides. Dealing and managing landslides requires few crucial steps, starting from collecting data on landslide location and typology – ...... Marjanović, M., Đurić, U., (2016) “From landslide inventory to landslide risk assessment: Methodology, current practice and challenges”. Geologica Macedonica, special issue vol. 4, 199– 208. Marjanović, M., Kovačević, M., Bajat, B., Voženílek, V., (2011) “Landslide susceptibility assessment using ...
... susceptibility classes distribution it was further possible to calculate weighted distance to the H landslide susceptibility class. Resulting exposure vulnerability map (Fig. 7) was superimposed to the inventory of elements at risk, to obtain the final relative risk (Fig. 8). Only the housing sector ...
... Luis Felipe Prada-Sarmiento and Juan Montero. The conference was originally scheduled to be held in Cartagena, Colombia in June 2020, but due to the SARS-CoV-2 pandemic, it was held online from February 22nd to February 26th 2021. https://www.issmge.org/publications/online-library SCG-XIII INT ...Miloš Marjanović, Biljana Abolmasov, Cvjetko Sandić, Miralem Mulać, Petar Begović. "Quantitative landslide risk assessment in the city of Tuzla" in SCG-Xiii International Symposium on Landslides. Cartagena, Colombia- February 22-26, 2021, International Society for Soil Mechanics and Geotechnical Engineering (2021)
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Design of a sucker rod pumping system
Ana Ponoćko (2024)For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...... ability to achieve a high ratio of discharge to suction pressure, make these pumps very efficient under any well conditions. [5] Insert pumps can be classified based on their seating method into: • Bottom Seating Pumps (a) • Top Seating Pumps (b) • Double Seating Pumps (c) a 6) B) Figure ...
... of Insert Pumps by Seating Method [5] 18 (b) Rod . O Figure 3.6. Tubing pump and Insert Pump The main difference between these two pump types is in the installation of the working barrel. Top Seating Since the pump body is connected to the cylinder, and the pump is seated in the upper ...
... Assembily: A-top B - bottom T - boltom, fravel barrel Barrel Type: | H -heavy wallf/metal plunger W - thin Wall fimetal plunger P - heauy wall fsof pack plunger S - thin wall fsot pack plunger PumpType: | R-rod T-tubing Example of a deep well pump designation according to API standards: ...Ana Ponoćko. Design of a sucker rod pumping system, 2024
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Mio-Pliocene Geodynamics and its Stratigraphic Consequences in the Area of Avala Mt. (Belgrade, Serbia)
... stratigraphic scale of the South Russia: current state and perspectives, GIN RAS, 356–359. STUDENCKA, B. & JASINOWSKI, M. (2011): Bivalves from the Middle Miocene reefs of Poland and Ukraine: a new approach to Badenian/Sarmatian boundary in the Paratethys. Acta Geologica Polonica, 61, 79–114. MIO-PLIOCENE ...
... stratigraphic scale of the South Russia: current state and perspectives, GIN RAS, 356-359. STUDENCKA, B. & JASINOWSKI, M. (2011): Bivalves from the Middle Miocene reefs of Poland and Ukraine: a new approach to Badenian/Sarmatian boundary in the Paratethys. Acta Geologica Polonica, 61, 79-114. MIO-PLIOCENE ...
... carbonate layers. Based on the obtained results we can suggest that the change from normal to reversed polar- ity in the lower part of the Eastern Paratethys Konkian (MOLOSTOVSKY & CHRAMOV, 1997; GREBENYUK, 2004) relates to the Chron C5AAn/C5Ar.3r boundary. °e duration of the Kon- kian can be estimated as 0 ...Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević. "Mio-Pliocene Geodynamics and its Stratigraphic Consequences in the Area of Avala Mt. (Belgrade, Serbia)" in 7th International Workshop: Neogene of Central and South-Eastern Europe, Velika, Croatia, maj 2017, Croatian Geological Society (2017)
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Tectono-lithostratigraphic model of the Northern Banat Miocene sediments (Pannonian Basin, Serbia)
Dejan Radivojević, Ljupko Rundić (2017)... sediments belong to postrift stage in the broader sense and lays unconformably over the Middle Miocene. A division of Miocene sedi- ments is straightforward until its upper part. Sediments deposited at time of Lake Pannon, based on the stratigraphic division of the Central Paratethys, belong to the Pannonian ...
... sediments belong to postrift stage in the broader sense and lays unconformably over the Middle Miocene. A division of Miocene sedi- ments is straightforward until its upper part. Sediments deposited at time of Lake Pannon, based on the stratigraphic division of the Central Paratethys, belong to the Pannonian ...
... most attention-grabbing part of Pannonian Basin in Serbia due to its hydrocarbon potential as well as for complex geology and presence of deepest depressions. °e hydrocarbon exploration in this area is almost 70 years old which led to large amount of high quality data. At the other side, still there ...Dejan Radivojević, Ljupko Rundić. "Tectono-lithostratigraphic model of the Northern Banat Miocene sediments (Pannonian Basin, Serbia)" in 7th International Workshop: Neogene of Central and South-Eastern Europe, Velika, Croatia, maj 2017, Croatian Geological Society (2017)
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Molecular and Isotope Composition of Biomarkers in Immature Oil Shale and its Liquid Pyrolysis Products (Open and Closed System)
Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović (2021)The molecular and isotopic composition of biomarkers in initial bitumen isolated from raw immature oil shale samples from the Lower Miocene Aleksinac Basin (Serbia) and liquid products (LPs) obtained by pyrolysis in open (OS) and closed systems (CS) are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in LPs is determined. The molecular composition of the LPs from the OS pyrolysis is very similar to those in initial bitumen, independently ...... –31.9 ‰ in the sample D13 and from –28.7 to –32.5 ‰ (average value –30.9 ‰) in the sample D16. The δ13C values of individual n-alkanes in LPs from the OS of samples D13 and D16 are in range from –32.6 to –35.8 ‰ (average value –34.1 ‰), and from –30.0 to –33.7 ‰ (average value –32.8 ‰), respectively ...
... and –30.3 ‰, average value –28.7 ‰, and from –27.8 to –31.1 ‰, average value –29.6 ‰ of the sample D16. The molecular composition of the LPs from the OS pyrolysis is very similar to those in initial bitumen, independently on kerogen type. Due to the fast release from the reaction medium, biomarker ...
... interpretation up to late diagenetic stage, whereas at higher maturities their distributions are very scarce and represented by several short-chain homologues, only. The LPs from the CS pyrolysis have the distributions of biomarkers similar to those in crude oils generated in an early to main stage of ...Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović. "Molecular and Isotope Composition of Biomarkers in Immature Oil Shale and its Liquid Pyrolysis Products (Open and Closed System)" in 30th International Meeting on Organic Geochemistry (IMOG 2021), European Association of Geoscientists & Engineers (2021). https://doi.org/10.3997/2214-4609.202134040