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Research Fund of Serbia

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Publications

Improvement of chemical control in the water-steam cycle of thermal power plants

Rajaković-Ognjanović, Vladana; Živojinović, Dragana; Grgur, Branimir; Rajaković, Ljubinka V.

(Pergamon-Elsevier Science Ltd, Oxford, 2011)

TY  - JOUR
AU  - Rajaković-Ognjanović, Vladana
AU  - Živojinović, Dragana
AU  - Grgur, Branimir
AU  - Rajaković, Ljubinka V.
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1923
AB  - A more effective chemical control in the water-steam cycle (WSC) of thermal power plants (TPP) is proposed in this paper. Minimization of corrosion effects by the production of ultra pure water and its strict control is the basis of all the investigated processes. The research involved the analysis of water samples in the WSC through key water quality parameters and by the most convenient analytical tools. The necessity for the stricter chemical control is demonstrated through a concrete example of the TPP Nikola Tesla, Serbia. After a thorough analysis of the chemical control system of the WSC, diagnostic and control parameters were chosen for continuous systematic measurements. Sodium and chloride ions were recognized as the ions which indicate the corrosion potential of the water and give insight into the proper production and maintenance of water within the WSC. Chemical transformations of crucial corrosion elements, iron and silica, were considered and related to their quantitative values.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Applied Thermal Engineering
T1  - Improvement of chemical control in the water-steam cycle of thermal power plants
EP  - 128
IS  - 1
SP  - 119
VL  - 31
DO  - 10.1016/j.applthermaleng.2010.08.028
ER  - 
@article{
author = "Rajaković-Ognjanović, Vladana and Živojinović, Dragana and Grgur, Branimir and Rajaković, Ljubinka V.",
year = "2011",
abstract = "A more effective chemical control in the water-steam cycle (WSC) of thermal power plants (TPP) is proposed in this paper. Minimization of corrosion effects by the production of ultra pure water and its strict control is the basis of all the investigated processes. The research involved the analysis of water samples in the WSC through key water quality parameters and by the most convenient analytical tools. The necessity for the stricter chemical control is demonstrated through a concrete example of the TPP Nikola Tesla, Serbia. After a thorough analysis of the chemical control system of the WSC, diagnostic and control parameters were chosen for continuous systematic measurements. Sodium and chloride ions were recognized as the ions which indicate the corrosion potential of the water and give insight into the proper production and maintenance of water within the WSC. Chemical transformations of crucial corrosion elements, iron and silica, were considered and related to their quantitative values.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Applied Thermal Engineering",
title = "Improvement of chemical control in the water-steam cycle of thermal power plants",
pages = "128-119",
number = "1",
volume = "31",
doi = "10.1016/j.applthermaleng.2010.08.028"
}
Rajaković-Ognjanović, V., Živojinović, D., Grgur, B.,& Rajaković, L. V.. (2011). Improvement of chemical control in the water-steam cycle of thermal power plants. in Applied Thermal Engineering
Pergamon-Elsevier Science Ltd, Oxford., 31(1), 119-128.
https://doi.org/10.1016/j.applthermaleng.2010.08.028
Rajaković-Ognjanović V, Živojinović D, Grgur B, Rajaković LV. Improvement of chemical control in the water-steam cycle of thermal power plants. in Applied Thermal Engineering. 2011;31(1):119-128.
doi:10.1016/j.applthermaleng.2010.08.028 .
Rajaković-Ognjanović, Vladana, Živojinović, Dragana, Grgur, Branimir, Rajaković, Ljubinka V., "Improvement of chemical control in the water-steam cycle of thermal power plants" in Applied Thermal Engineering, 31, no. 1 (2011):119-128,
https://doi.org/10.1016/j.applthermaleng.2010.08.028 . .
3
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19
33

Corrosion of an austenite and ferrite stainless steel weld

Rajaković-Ognjanović, Vladana; Grgur, Branimir

(Serbian Chemical Society, Belgrade, 2011)

TY  - JOUR
AU  - Rajaković-Ognjanović, Vladana
AU  - Grgur, Branimir
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1801
AB  - Dissimilar metal connections are prone to frequent failures. These failures are attributed to the difference in the mechanical properties across the weld, the coefficients of thermal expansion of the two types of steels and the resulting creep at the interface. For the weld analyzed in this research, it was shown that corrosion measurements can be used for a proper evaluation of the quality of weld material and for the prediction of whether or not the material, after the applied welding process, can be in service without failures. It was found that the corrosion of the weld analyzed in this research resulted from the simultaneous activity of different types of corrosion. In this study, electrochemical techniques including polarization and metallographic analysis were used to analyze the corrosion of a weld material of ferrite and austenitic stainless steels. Based on surface, chemical and electrochemical analyses, it was concluded that corrosion occurrence was the result of the simultaneous activity of contact corrosion (ferrite and austenitic material conjuction), stress corrosion (originating from deformed ferrite structure) and inter-granular corrosion (due to chromium carbide precipitation). The value of corrosion potential of -0.53 V shows that this weld, after the thermal treatment, is not able to repassivate a protective oxide film.
AB  - Spojevi različitih metala dobijenih zavarivanjem skloni su propadanju uglavnom usled pojave različitih vidova korozije. Fizičko-hemijska, mehanička svojstva, kao i koeficijenti toplotnog širenja različitih čelika najčešći su uzrok pucanja materijala na zavarenim spojevima. Istraživanja u ovom radu su pokazala da se ispitivanje korozije materijala može koristiti za procenu kvaliteta spojeva zavarenih materijala. Različite analitičke, metalografske i elektrohemijske tehnike i metode analize su primenjene za ispitivanje korozije zavarenog spoja nerđajućih čelika feritne i austenitne strukture. Ustanovljeno je da do pojave korozije na zavarenom spoju ispitivanih materijala prevashodno dolazi usled: kontaktne korozije, naponske korozije (koja potiče od deformisane strukture ferita) i međukristalne korozije (posledica izluživanja hrom-karbida) u feritnom delu zavarenog spoja.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Corrosion of an austenite and ferrite stainless steel weld
T1  - Korozija zavarenog spoja austenitnog i feritnog nerđajućeg čelika
EP  - 1035
IS  - 7
SP  - 1027
VL  - 76
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1801
ER  - 
@article{
author = "Rajaković-Ognjanović, Vladana and Grgur, Branimir",
year = "2011",
abstract = "Dissimilar metal connections are prone to frequent failures. These failures are attributed to the difference in the mechanical properties across the weld, the coefficients of thermal expansion of the two types of steels and the resulting creep at the interface. For the weld analyzed in this research, it was shown that corrosion measurements can be used for a proper evaluation of the quality of weld material and for the prediction of whether or not the material, after the applied welding process, can be in service without failures. It was found that the corrosion of the weld analyzed in this research resulted from the simultaneous activity of different types of corrosion. In this study, electrochemical techniques including polarization and metallographic analysis were used to analyze the corrosion of a weld material of ferrite and austenitic stainless steels. Based on surface, chemical and electrochemical analyses, it was concluded that corrosion occurrence was the result of the simultaneous activity of contact corrosion (ferrite and austenitic material conjuction), stress corrosion (originating from deformed ferrite structure) and inter-granular corrosion (due to chromium carbide precipitation). The value of corrosion potential of -0.53 V shows that this weld, after the thermal treatment, is not able to repassivate a protective oxide film., Spojevi različitih metala dobijenih zavarivanjem skloni su propadanju uglavnom usled pojave različitih vidova korozije. Fizičko-hemijska, mehanička svojstva, kao i koeficijenti toplotnog širenja različitih čelika najčešći su uzrok pucanja materijala na zavarenim spojevima. Istraživanja u ovom radu su pokazala da se ispitivanje korozije materijala može koristiti za procenu kvaliteta spojeva zavarenih materijala. Različite analitičke, metalografske i elektrohemijske tehnike i metode analize su primenjene za ispitivanje korozije zavarenog spoja nerđajućih čelika feritne i austenitne strukture. Ustanovljeno je da do pojave korozije na zavarenom spoju ispitivanih materijala prevashodno dolazi usled: kontaktne korozije, naponske korozije (koja potiče od deformisane strukture ferita) i međukristalne korozije (posledica izluživanja hrom-karbida) u feritnom delu zavarenog spoja.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Corrosion of an austenite and ferrite stainless steel weld, Korozija zavarenog spoja austenitnog i feritnog nerđajućeg čelika",
pages = "1035-1027",
number = "7",
volume = "76",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1801"
}
Rajaković-Ognjanović, V.,& Grgur, B.. (2011). Corrosion of an austenite and ferrite stainless steel weld. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 76(7), 1027-1035.
https://hdl.handle.net/21.15107/rcub_technorep_1801
Rajaković-Ognjanović V, Grgur B. Corrosion of an austenite and ferrite stainless steel weld. in Journal of the Serbian Chemical Society. 2011;76(7):1027-1035.
https://hdl.handle.net/21.15107/rcub_technorep_1801 .
Rajaković-Ognjanović, Vladana, Grgur, Branimir, "Corrosion of an austenite and ferrite stainless steel weld" in Journal of the Serbian Chemical Society, 76, no. 7 (2011):1027-1035,
https://hdl.handle.net/21.15107/rcub_technorep_1801 .
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6

A correlation for heat of vaporization of pure compounds

Jovanović, Jovan; Grozdanić, Dušan K.

(Korean Institute Chemical Engineers, Seoul, 2008)

TY  - JOUR
AU  - Jovanović, Jovan
AU  - Grozdanić, Dušan K.
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1231
AB  - Twenty-seven selected equations were tested on 162 compounds with 1958 calorimetric data for their abilities to reflect the temperature influence on the heat of vaporization of pure compounds. A new equation is recommended (overall percent deviation 0.27% and percent deviation 0.59% above 0.9T(r)).
PB  - Korean Institute Chemical  Engineers, Seoul
T2  - Korean Journal of Chemical Engineering
T1  - A correlation for heat of vaporization of pure compounds
EP  - 1508
IS  - 6
SP  - 1499
VL  - 25
DO  - 10.1007/s11814-008-0247-3
ER  - 
@article{
author = "Jovanović, Jovan and Grozdanić, Dušan K.",
year = "2008",
abstract = "Twenty-seven selected equations were tested on 162 compounds with 1958 calorimetric data for their abilities to reflect the temperature influence on the heat of vaporization of pure compounds. A new equation is recommended (overall percent deviation 0.27% and percent deviation 0.59% above 0.9T(r)).",
publisher = "Korean Institute Chemical  Engineers, Seoul",
journal = "Korean Journal of Chemical Engineering",
title = "A correlation for heat of vaporization of pure compounds",
pages = "1508-1499",
number = "6",
volume = "25",
doi = "10.1007/s11814-008-0247-3"
}
Jovanović, J.,& Grozdanić, D. K.. (2008). A correlation for heat of vaporization of pure compounds. in Korean Journal of Chemical Engineering
Korean Institute Chemical  Engineers, Seoul., 25(6), 1499-1508.
https://doi.org/10.1007/s11814-008-0247-3
Jovanović J, Grozdanić DK. A correlation for heat of vaporization of pure compounds. in Korean Journal of Chemical Engineering. 2008;25(6):1499-1508.
doi:10.1007/s11814-008-0247-3 .
Jovanović, Jovan, Grozdanić, Dušan K., "A correlation for heat of vaporization of pure compounds" in Korean Journal of Chemical Engineering, 25, no. 6 (2008):1499-1508,
https://doi.org/10.1007/s11814-008-0247-3 . .
5
5
5

On the possibility of the direct preparation of the sodium salt of copper phthalocyanine-4-sulfonic acid

Stojaković, Đorđe; Rajić, Nevenka

(Serbian Chemical Society, 1994)

TY  - JOUR
AU  - Stojaković, Đorđe
AU  - Rajić, Nevenka
PY  - 1994
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6395
AB  - The reaction of a 1:3 molar mixture of the monosodium salt of 4-sulfophthalic acid and phthalic acod, carried out in the presence of NH4Cl, urea, CuSO4 5H2O, and (NH4)2MoO4, does not yield the mono-substituted derivative, i.e., the sodium salt of copper-phthalocyanine-4-sulfonic acid (mSCuPc) but a 1:3 mixture of tetrasodium salt of copper-phthalocyanine-4-sulfonic acid-4,4',4'',4'''-tetrasulfonic acid (tSCuPc) and copper phthalocyanine (CuPc). However, quantum-mechanical calculations indicate that mSCuPc should be energetically favoured over the equivalent mixture of tSCuPc and CuPc. The preferential formation of the latter mixture has been attributed to kinetic factors arising from simultaneous presence of ionic and covalent species in the reaction medium.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - On the possibility of the direct preparation of the sodium salt of copper phthalocyanine-4-sulfonic acid
EP  - 561
SP  - 557
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6395
ER  - 
@article{
author = "Stojaković, Đorđe and Rajić, Nevenka",
year = "1994",
abstract = "The reaction of a 1:3 molar mixture of the monosodium salt of 4-sulfophthalic acid and phthalic acod, carried out in the presence of NH4Cl, urea, CuSO4 5H2O, and (NH4)2MoO4, does not yield the mono-substituted derivative, i.e., the sodium salt of copper-phthalocyanine-4-sulfonic acid (mSCuPc) but a 1:3 mixture of tetrasodium salt of copper-phthalocyanine-4-sulfonic acid-4,4',4'',4'''-tetrasulfonic acid (tSCuPc) and copper phthalocyanine (CuPc). However, quantum-mechanical calculations indicate that mSCuPc should be energetically favoured over the equivalent mixture of tSCuPc and CuPc. The preferential formation of the latter mixture has been attributed to kinetic factors arising from simultaneous presence of ionic and covalent species in the reaction medium.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "On the possibility of the direct preparation of the sodium salt of copper phthalocyanine-4-sulfonic acid",
pages = "561-557",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6395"
}
Stojaković, Đ.,& Rajić, N.. (1994). On the possibility of the direct preparation of the sodium salt of copper phthalocyanine-4-sulfonic acid. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 557-561.
https://hdl.handle.net/21.15107/rcub_technorep_6395
Stojaković Đ, Rajić N. On the possibility of the direct preparation of the sodium salt of copper phthalocyanine-4-sulfonic acid. in Journal of the Serbian Chemical Society. 1994;:557-561.
https://hdl.handle.net/21.15107/rcub_technorep_6395 .
Stojaković, Đorđe, Rajić, Nevenka, "On the possibility of the direct preparation of the sodium salt of copper phthalocyanine-4-sulfonic acid" in Journal of the Serbian Chemical Society (1994):557-561,
https://hdl.handle.net/21.15107/rcub_technorep_6395 .

A cobalt(II) complex with ethylenediamine inside zeolite A

Rajić, Nevenka Z.; Stojaković, Djordje R.

(Slovenian Chemical Society, 1994)

TY  - JOUR
AU  - Rajić, Nevenka Z.
AU  - Stojaković, Djordje R.
PY  - 1994
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6396
AB  - Reaction of the partially dehydrated cobalt(II)-exchanged zeolite A (Co-A) with ethylenediamine (en) at 130 C in an autoclave yields after 24 h a product (Coen-A) in which entire Co(II) content (tetrahedrally coordinated in the partially dehydrated Co-A) is present in the form of the Co(en)3(2+) ions. Steric factors require the Co(en)3(2+) ions to be substituted only in the larger cages of zeolite A (alfa-cages), implying that the conversion of Co-A into Coen-A is accompanied by a migration of Co2+ ions initially located in the smaller cages (beta-cages) into alfa-cages. The Co/en molar ratio in Coen-A is 1:5.6, so that a fraction of en is also present in a noncoordinated form. IR spectral data suggest that the coordinated en adopts to the gauche conformation. TG analysis shows that the thermal decomposition of Coen-A occurs in four steps, such that water is lost first, followed by the loss of en.
PB  - Slovenian Chemical Society
T2  - Acta Chimica Slovenica
T1  - A cobalt(II) complex with ethylenediamine inside zeolite A
EP  - 304
IS  - 3
SP  - 295
VL  - 41
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6396
ER  - 
@article{
author = "Rajić, Nevenka Z. and Stojaković, Djordje R.",
year = "1994",
abstract = "Reaction of the partially dehydrated cobalt(II)-exchanged zeolite A (Co-A) with ethylenediamine (en) at 130 C in an autoclave yields after 24 h a product (Coen-A) in which entire Co(II) content (tetrahedrally coordinated in the partially dehydrated Co-A) is present in the form of the Co(en)3(2+) ions. Steric factors require the Co(en)3(2+) ions to be substituted only in the larger cages of zeolite A (alfa-cages), implying that the conversion of Co-A into Coen-A is accompanied by a migration of Co2+ ions initially located in the smaller cages (beta-cages) into alfa-cages. The Co/en molar ratio in Coen-A is 1:5.6, so that a fraction of en is also present in a noncoordinated form. IR spectral data suggest that the coordinated en adopts to the gauche conformation. TG analysis shows that the thermal decomposition of Coen-A occurs in four steps, such that water is lost first, followed by the loss of en.",
publisher = "Slovenian Chemical Society",
journal = "Acta Chimica Slovenica",
title = "A cobalt(II) complex with ethylenediamine inside zeolite A",
pages = "304-295",
number = "3",
volume = "41",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6396"
}
Rajić, N. Z.,& Stojaković, D. R.. (1994). A cobalt(II) complex with ethylenediamine inside zeolite A. in Acta Chimica Slovenica
Slovenian Chemical Society., 41(3), 295-304.
https://hdl.handle.net/21.15107/rcub_technorep_6396
Rajić NZ, Stojaković DR. A cobalt(II) complex with ethylenediamine inside zeolite A. in Acta Chimica Slovenica. 1994;41(3):295-304.
https://hdl.handle.net/21.15107/rcub_technorep_6396 .
Rajić, Nevenka Z., Stojaković, Djordje R., "A cobalt(II) complex with ethylenediamine inside zeolite A" in Acta Chimica Slovenica, 41, no. 3 (1994):295-304,
https://hdl.handle.net/21.15107/rcub_technorep_6396 .

On the formation of CoAPSO-44

Batista, Jurka; Kaučič, Venčeslav; Rajić, Nevenka; Stojaković, Djordje

(Butterworth-Heinemann, 1992)

TY  - JOUR
AU  - Batista, Jurka
AU  - Kaučič, Venčeslav
AU  - Rajić, Nevenka
AU  - Stojaković, Djordje
PY  - 1992
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5054
AB  - Hydrothermal synthesis of CoAPSO-44 in the presence of cyclohexylamine (CHA) as the template is generally accompanied by the formation of an unknown phase, “Co(APSO)N.” Electronic spectroscopy indicates that CO(APSO)N contains Co2+ in a pentacoordinated environment. When Co(APSO)N is heated at 195°C in a water suspension under autogenic pressure, two processes occur: (a) a partial conversion of Co(APSO)N into CoAPSO-44 and (b) decomposition of Co(APSO)N into Co- and Al-phosphates. Thermal removal of CHA from Co(APSO)N results in a breakdown of the latter's cyrstal lattice.
PB  - Butterworth-Heinemann
T2  - ZEOLITES
T1  - On the formation of CoAPSO-44
EP  - 928
IS  - 8
SP  - 925
VL  - 12
DO  - 10.1016/0144-2449(92)90156-J
ER  - 
@article{
author = "Batista, Jurka and Kaučič, Venčeslav and Rajić, Nevenka and Stojaković, Djordje",
year = "1992",
abstract = "Hydrothermal synthesis of CoAPSO-44 in the presence of cyclohexylamine (CHA) as the template is generally accompanied by the formation of an unknown phase, “Co(APSO)N.” Electronic spectroscopy indicates that CO(APSO)N contains Co2+ in a pentacoordinated environment. When Co(APSO)N is heated at 195°C in a water suspension under autogenic pressure, two processes occur: (a) a partial conversion of Co(APSO)N into CoAPSO-44 and (b) decomposition of Co(APSO)N into Co- and Al-phosphates. Thermal removal of CHA from Co(APSO)N results in a breakdown of the latter's cyrstal lattice.",
publisher = "Butterworth-Heinemann",
journal = "ZEOLITES",
title = "On the formation of CoAPSO-44",
pages = "928-925",
number = "8",
volume = "12",
doi = "10.1016/0144-2449(92)90156-J"
}
Batista, J., Kaučič, V., Rajić, N.,& Stojaković, D.. (1992). On the formation of CoAPSO-44. in ZEOLITES
Butterworth-Heinemann., 12(8), 925-928.
https://doi.org/10.1016/0144-2449(92)90156-J
Batista J, Kaučič V, Rajić N, Stojaković D. On the formation of CoAPSO-44. in ZEOLITES. 1992;12(8):925-928.
doi:10.1016/0144-2449(92)90156-J .
Batista, Jurka, Kaučič, Venčeslav, Rajić, Nevenka, Stojaković, Djordje, "On the formation of CoAPSO-44" in ZEOLITES, 12, no. 8 (1992):925-928,
https://doi.org/10.1016/0144-2449(92)90156-J . .
26
27

Preparation and properties of (2-nitrophtalocyanato)copper(II)

Rajić, Nevenka; Stojaković, Djordje

(Serbian Chemical Society, 1989)

TY  - JOUR
AU  - Rajić, Nevenka
AU  - Stojaković, Djordje
PY  - 1989
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6393
AB  - The synthesis of (2-nitrophthalocyanato)copper(II) is described, and its X-ray powder diffraction pattern, solubility, electronic and infrared spectra, and thermal stability are reported. The product contains as an impurity about a 5% mass of unsubstituted phthalocyaninatocopper(II).
PB  - Serbian Chemical Society
T2  - Journal of Serbian Chemistry
T1  - Preparation and properties of (2-nitrophtalocyanato)copper(II)
EP  - 144
IS  - 4
SP  - 141
VL  - 54
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6393
ER  - 
@article{
author = "Rajić, Nevenka and Stojaković, Djordje",
year = "1989",
abstract = "The synthesis of (2-nitrophthalocyanato)copper(II) is described, and its X-ray powder diffraction pattern, solubility, electronic and infrared spectra, and thermal stability are reported. The product contains as an impurity about a 5% mass of unsubstituted phthalocyaninatocopper(II).",
publisher = "Serbian Chemical Society",
journal = "Journal of Serbian Chemistry",
title = "Preparation and properties of (2-nitrophtalocyanato)copper(II)",
pages = "144-141",
number = "4",
volume = "54",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6393"
}
Rajić, N.,& Stojaković, D.. (1989). Preparation and properties of (2-nitrophtalocyanato)copper(II). in Journal of Serbian Chemistry
Serbian Chemical Society., 54(4), 141-144.
https://hdl.handle.net/21.15107/rcub_technorep_6393
Rajić N, Stojaković D. Preparation and properties of (2-nitrophtalocyanato)copper(II). in Journal of Serbian Chemistry. 1989;54(4):141-144.
https://hdl.handle.net/21.15107/rcub_technorep_6393 .
Rajić, Nevenka, Stojaković, Djordje, "Preparation and properties of (2-nitrophtalocyanato)copper(II)" in Journal of Serbian Chemistry, 54, no. 4 (1989):141-144,
https://hdl.handle.net/21.15107/rcub_technorep_6393 .

Synthesis and Characterization of Amorphous Nickel(II) Aluminosilicate

Rajić, Nevenka; Stojaković, Đorđe

(Hrvatsko kemijsko društvo, 1987)

TY  - JOUR
AU  - Rajić, Nevenka
AU  - Stojaković, Đorđe
PY  - 1987
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5058
AB  - Amorphous aluminosilicates containing about 12 wt.%  nickel have been synthesized by cation exchange. Approximately 40 % of the nickel content is present in the form of octahedral [Ni(H20)6]2+ ions while the bulk of Ni2+ is coordinated both by H2O molecules and by oxygen atoms of the aluminosilicate framework. When the materials are heated in air at 350 oC, a change in the nickel coordination environment/geometry and possibly also a partial oxidation take place.
AB  - Amorfni aluminosilikati sa oko 12 mas. % nikla dobijeni su jonskom izmenom. Oko 40% nikla nalazi se u obliku oktaedarski koordiniranih jona [Ni(H20)6]2+, a preostali nikal koordiniran je sa molekulima vode i kiseonikovim atomima iz aluminosilikatne rešetke. Zagrevanjem na vazduhu, na oko 350 0C dolazi do promena u koordinaciji, odnosno geometriji nikla, a moguće je da dolazi i do delimične oksidacije nikla.
PB  - Hrvatsko kemijsko društvo
T2  - CROATICA CHEMICA  ACTA
T1  - Synthesis and Characterization of Amorphous Nickel(II) Aluminosilicate
EP  - 739
IS  - 4
SP  - 735
VL  - 60
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5058
ER  - 
@article{
author = "Rajić, Nevenka and Stojaković, Đorđe",
year = "1987",
abstract = "Amorphous aluminosilicates containing about 12 wt.%  nickel have been synthesized by cation exchange. Approximately 40 % of the nickel content is present in the form of octahedral [Ni(H20)6]2+ ions while the bulk of Ni2+ is coordinated both by H2O molecules and by oxygen atoms of the aluminosilicate framework. When the materials are heated in air at 350 oC, a change in the nickel coordination environment/geometry and possibly also a partial oxidation take place., Amorfni aluminosilikati sa oko 12 mas. % nikla dobijeni su jonskom izmenom. Oko 40% nikla nalazi se u obliku oktaedarski koordiniranih jona [Ni(H20)6]2+, a preostali nikal koordiniran je sa molekulima vode i kiseonikovim atomima iz aluminosilikatne rešetke. Zagrevanjem na vazduhu, na oko 350 0C dolazi do promena u koordinaciji, odnosno geometriji nikla, a moguće je da dolazi i do delimične oksidacije nikla.",
publisher = "Hrvatsko kemijsko društvo",
journal = "CROATICA CHEMICA  ACTA",
title = "Synthesis and Characterization of Amorphous Nickel(II) Aluminosilicate",
pages = "739-735",
number = "4",
volume = "60",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5058"
}
Rajić, N.,& Stojaković, Đ.. (1987). Synthesis and Characterization of Amorphous Nickel(II) Aluminosilicate. in CROATICA CHEMICA  ACTA
Hrvatsko kemijsko društvo., 60(4), 735-739.
https://hdl.handle.net/21.15107/rcub_technorep_5058
Rajić N, Stojaković Đ. Synthesis and Characterization of Amorphous Nickel(II) Aluminosilicate. in CROATICA CHEMICA  ACTA. 1987;60(4):735-739.
https://hdl.handle.net/21.15107/rcub_technorep_5058 .
Rajić, Nevenka, Stojaković, Đorđe, "Synthesis and Characterization of Amorphous Nickel(II) Aluminosilicate" in CROATICA CHEMICA  ACTA, 60, no. 4 (1987):735-739,
https://hdl.handle.net/21.15107/rcub_technorep_5058 .