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Obrazovanje hloridnih i bromidnih kompleksa kobalta(II) u električki nesimetričnim vodenim rastopima soli

Cobalt(II) chloride and bromide complex formation in electrical unsymmetric aqueous molten salts

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2009
Disertacija.pdf (9.267Mb)
Author
Vraneš, Milan
Mentor
Zsigrai, István
Committee members
Perišić-Janjić, Nada
Zsigrai, István
Mentus, Slavko
Gadžurić, Slobodan
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Abstract
U ovoj doktorskoj disertaciji proučavano je građenje kompleksa kobalta(II) sa hloridnim i  bromidnim jonima u vodenim rastopima tipa xCa(NO3)2·zH2O – (1-x)NH4NO3 pri različitom sastavu soli (x= 0,3 – 0,9), različitom sadržaju vode (z= 2,67 – 6,67) i na različitim temperaturama (45, 55 i 65oC). Istraživanja su imala za cilj proučavanje reakcije građenja kompleksa kobalta(II) sa hloridnim i bromidnim jonima u vodenim rastopima xCa(NO3)2·zH2O – (1–x)NH4NO3,  uticaja temperature, sastava elektrolita i sadržaja vode na proces kompleksiranja, kao i određivanje termodinamičkih parametara koji karakterišu reakcije asocijacije u ovim sistemima. Ovakvi rastopi soli su posebno interesantni zbog svoje niske tačke topljenja i visoke latentne toplote topljenja pa se mogu koristiti kao fazno-promenljivi materijali za skladištenje toplotne energije.
In this thesis absorption spectra of cobalt(II) chloride and bromide in calcium nitrate – ammonium nitrate – water system of the composition  xCa(NO3)2·zH2O – (1–x)NH4NO3 (x= 0.30 - 0.90 and z= 2.67 – 6.67) have been investigated in the wavelength range 400-800 nm at three different temperatures: 45, 55 and 65oC. Temparature, composition of the melt and water content influence on complex formation reactions between cobalt(II) and halide ions in aqueous xCa(NO3)2·zH2O – (1–x)NH4NO3 melts have been studied. Thermodynamic parameters for cobalt(II) – halide association process in different solvents also were determined. Investigated systems are interesting because of their high values of latent heat of fusion and low melting points. Due to these reasons, some melts are proposed for  heat energy storage materials, usually known as phase change materials (PCM).
Faculty:
University of Novi Sad, Faculty of Science
Date:
23-02-2009
Keywords:
rastopi soli / Molten salt / spektrofotometrija / konstante stabilnosti / termodinamika / kalcijum-nitrat tetrahidrat / amonijum-nitrat / spectrophotometry / stability constants / thermodynamics / calcium nitrate tetrahydrate / ammonium nitrate
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http://www.cris.uns.ac.rs/DownloadFileServlet/Disertacija140118085896415.pdf?controlNumber=(BISIS)83678&fileName=140118085896415.pdf&id=2043&source=NaRDuS&language=sr
http://nardus.mpn.gov.rs/handle/123456789/1704
http://www.cris.uns.ac.rs/record.jsf?recordId=83678&source=NaRDuS&language=sr

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