Obradović, Marko

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orcid::0000-0002-6826-3232
  • Obradović, Marko (3)
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Author's Bibliography

Study of pyrolysis of high density polyethylene in the open system and estimation of its capability for co-pyrolysis with lignite

Kojić, Ivan; Bechtel, Achim; Kittinger, Friedrich; Stevanović, Nikola R.; Obradović, Marko; Stojanović, Ksenija A.

(Serbian Chemical Soc, Belgrade, 2018)

TY  - JOUR
AU  - Kojić, Ivan
AU  - Bechtel, Achim
AU  - Kittinger, Friedrich
AU  - Stevanović, Nikola R.
AU  - Obradović, Marko
AU  - Stojanović, Ksenija A.
PY  - 2018
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/2201
AB  - Pyrolysis of high density polyethylene (HDPE) in the open system was studied. A plastic bag for food packing was used as a source of HDPE. Pyrolysis was performed at temperatures of 400, 450 and 500 degrees C, which were chosen based on thermogravimetric analysis. The HDPE pyrolysis yielded liquid, gaseous and solid products. Temperature rise resulted in the increase of conversion of HDPE into liquid and gaseous products. The main constituents of liquid pyrolysates are 1-n-alkenes, n-alkanes and terminal n-dienes. The composition of liquid products indicates that the performed pyrolysis of HDPE could not serve as a standalone operation for the production of gasoline or diesel, but preferably as a pre-treatment to yield a product to be blended into a refinery or petrochemical feed stream. The advantage of a liquid pyrolysate in comparison to crude oil is the extremely low content of aromatic hydrocarbons and the absence of polar compounds. The gaseous products have desirable composition and consist mainly of methane and ethene. The solid residues do not produce ash by combustion and have high calorific values. Co-pyrolysis of HDPE with mineral-rich lignite indicated positive synergetic effect at 450 and 500 degrees C, which is reflected through the increased experimental yields of liquid and gaseous products in comparison to theoretical ones.
PB  - Serbian Chemical Soc, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Study of pyrolysis of high density polyethylene in the open system and estimation of its capability for co-pyrolysis with lignite
VL  - 83
IS  - 7-8
SP  - 923
EP  - 940
DO  - 10.2298/JSC171215027K
ER  - 
@article{
author = "Kojić, Ivan and Bechtel, Achim and Kittinger, Friedrich and Stevanović, Nikola R. and Obradović, Marko and Stojanović, Ksenija A.",
year = "2018",
url = "http://cherry.chem.bg.ac.rs/handle/123456789/2201",
abstract = "Pyrolysis of high density polyethylene (HDPE) in the open system was studied. A plastic bag for food packing was used as a source of HDPE. Pyrolysis was performed at temperatures of 400, 450 and 500 degrees C, which were chosen based on thermogravimetric analysis. The HDPE pyrolysis yielded liquid, gaseous and solid products. Temperature rise resulted in the increase of conversion of HDPE into liquid and gaseous products. The main constituents of liquid pyrolysates are 1-n-alkenes, n-alkanes and terminal n-dienes. The composition of liquid products indicates that the performed pyrolysis of HDPE could not serve as a standalone operation for the production of gasoline or diesel, but preferably as a pre-treatment to yield a product to be blended into a refinery or petrochemical feed stream. The advantage of a liquid pyrolysate in comparison to crude oil is the extremely low content of aromatic hydrocarbons and the absence of polar compounds. The gaseous products have desirable composition and consist mainly of methane and ethene. The solid residues do not produce ash by combustion and have high calorific values. Co-pyrolysis of HDPE with mineral-rich lignite indicated positive synergetic effect at 450 and 500 degrees C, which is reflected through the increased experimental yields of liquid and gaseous products in comparison to theoretical ones.",
publisher = "Serbian Chemical Soc, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Study of pyrolysis of high density polyethylene in the open system and estimation of its capability for co-pyrolysis with lignite",
volume = "83",
number = "7-8",
pages = "923-940",
doi = "10.2298/JSC171215027K"
}
Kojić, I., Bechtel, A., Kittinger, F., Stevanović, N. R., Obradović, M.,& Stojanović, K. A. (2018). Study of pyrolysis of high density polyethylene in the open system and estimation of its capability for co-pyrolysis with lignite.
Journal of the Serbian Chemical Society
Serbian Chemical Soc, Belgrade., 83(7-8), 923-940.
https://doi.org/10.2298/JSC171215027K
Kojić I, Bechtel A, Kittinger F, Stevanović NR, Obradović M, Stojanović KA. Study of pyrolysis of high density polyethylene in the open system and estimation of its capability for co-pyrolysis with lignite. Journal of the Serbian Chemical Society. 2018;83(7-8):923-940
Kojić Ivan, Bechtel Achim, Kittinger Friedrich, Stevanović Nikola R., Obradović Marko, Stojanović Ksenija A., "Study of pyrolysis of high density polyethylene in the open system and estimation of its capability for co-pyrolysis with lignite" Journal of the Serbian Chemical Society, 83, no. 7-8 (2018):923-940,
https://doi.org/10.2298/JSC171215027K .
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Supplementary data for the article: Kojic, I.; Bechtel, A.; Kittinger, F.; Stevanovic, N.; Obradovic, M.; Stojanovic, K. Study of Pyrolysis of High Density Polyethylene in the Open System and Estimation of Its Capability for Co-Pyrolysis with Lignite. J. Serb. Chem. Soc. 2018, 83 (7–8), 923–940. https://doi.org/10.2298/JSC171215027K

Kojić, Ivan; Bechtel, Achim; Kittinger, Friedrich; Stevanović, Nikola R.; Obradović, Marko; Stojanović, Ksenija A.

(Serbian Chemical Soc, Belgrade, 2018)

TY  - BOOK
AU  - Kojić, Ivan
AU  - Bechtel, Achim
AU  - Kittinger, Friedrich
AU  - Stevanović, Nikola R.
AU  - Obradović, Marko
AU  - Stojanović, Ksenija A.
PY  - 2018
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/3306
PB  - Serbian Chemical Soc, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Supplementary data for the article: Kojic, I.; Bechtel, A.; Kittinger, F.; Stevanovic, N.; Obradovic, M.; Stojanovic, K. Study of Pyrolysis of High Density Polyethylene in the Open System and Estimation of Its Capability for Co-Pyrolysis with Lignite. J. Serb. Chem. Soc. 2018, 83 (7–8), 923–940. https://doi.org/10.2298/JSC171215027K
ER  - 
@book{
author = "Kojić, Ivan and Bechtel, Achim and Kittinger, Friedrich and Stevanović, Nikola R. and Obradović, Marko and Stojanović, Ksenija A.",
year = "2018",
url = "http://cherry.chem.bg.ac.rs/handle/123456789/3306",
publisher = "Serbian Chemical Soc, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Supplementary data for the article: Kojic, I.; Bechtel, A.; Kittinger, F.; Stevanovic, N.; Obradovic, M.; Stojanovic, K. Study of Pyrolysis of High Density Polyethylene in the Open System and Estimation of Its Capability for Co-Pyrolysis with Lignite. J. Serb. Chem. Soc. 2018, 83 (7–8), 923–940. https://doi.org/10.2298/JSC171215027K"
}
Kojić, I., Bechtel, A., Kittinger, F., Stevanović, N. R., Obradović, M.,& Stojanović, K. A. (2018). Supplementary data for the article: Kojic, I.; Bechtel, A.; Kittinger, F.; Stevanovic, N.; Obradovic, M.; Stojanovic, K. Study of Pyrolysis of High Density Polyethylene in the Open System and Estimation of Its Capability for Co-Pyrolysis with Lignite. J. Serb. Chem. Soc. 2018, 83 (7–8), 923–940. https://doi.org/10.2298/JSC171215027K.
Journal of the Serbian Chemical Society
Serbian Chemical Soc, Belgrade..
Kojić I, Bechtel A, Kittinger F, Stevanović NR, Obradović M, Stojanović KA. Supplementary data for the article: Kojic, I.; Bechtel, A.; Kittinger, F.; Stevanovic, N.; Obradovic, M.; Stojanovic, K. Study of Pyrolysis of High Density Polyethylene in the Open System and Estimation of Its Capability for Co-Pyrolysis with Lignite. J. Serb. Chem. Soc. 2018, 83 (7–8), 923–940. https://doi.org/10.2298/JSC171215027K. Journal of the Serbian Chemical Society. 2018;
Kojić Ivan, Bechtel Achim, Kittinger Friedrich, Stevanović Nikola R., Obradović Marko, Stojanović Ksenija A., "Supplementary data for the article: Kojic, I.; Bechtel, A.; Kittinger, F.; Stevanovic, N.; Obradovic, M.; Stojanovic, K. Study of Pyrolysis of High Density Polyethylene in the Open System and Estimation of Its Capability for Co-Pyrolysis with Lignite. J. Serb. Chem. Soc. 2018, 83 (7–8), 923–940. https://doi.org/10.2298/JSC171215027K" Journal of the Serbian Chemical Society (2018)

Statistical analysis of the influence of major tributaries to the eco-chemical status of the Danube River

Ilijević, Konstantin; Obradović, Marko; Jevremovic, Vesna; Gržetić, Ivan

(Springer, Dordrecht, 2015)

TY  - JOUR
AU  - Ilijević, Konstantin
AU  - Obradović, Marko
AU  - Jevremovic, Vesna
AU  - Gržetić, Ivan
PY  - 2015
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/1956
AB  - We have assembled and assessed the statistical procedure which is capable to objectively explore influence of the Danube's major tributaries (the Rivers Tisa, Sava, and Velika Morava) to its eco-chemical status. Procedure contains several tests for measurement of central tendencies: one-way analysis of variance (ANOVA), repeated measures ANOVA, and non-parametric Kruskal-Wallis and Mann-Whitney tests. Various nuisance factors, (outliers, departures from normality, seasonality, and heteroscedasticity) which are present in large data bases, affect the objectivity of central tendency tests; therefore, it was important not only to estimate their robustness, but also to apply proper procedures for detection of the nuisance factors (Grubbs', generalized ESD-extreme Studentized deviate, Kolmogorov-Smirnov, Shapiro-Wilk, turning point, Wald-Wolfowitz runs, Kendall rank, and Levene's tests) and to mitigate their influence (outlier exclusion, Box-Cox, and logarithmic transformations). The analysis of selected eco-chemical parameters: biological oxygen demand-5, chemical oxygen demand, UV extinction at 254 nm, dissolved oxygen, oxygen saturation, total dissolved solids, electrical conductivity, suspended matter, total phosphorus, phosphates, nitrates, ammonia, pH, total alkalinity, m-2p alkalinity, CO2, and temperature, was performed for 15 years period. The Tisa was the most polluted tributary, but its pollution load was not substantial enough to exceed the Danube self-purification potential. The City of Belgrade was also identified as serious pollution source. Assessment of assembled statistical procedure, which was based on the real environmental data, indicates that proposed tests are sufficiently robust to the observed level of nuisance factors with the exception of pronounced seasonality.
PB  - Springer, Dordrecht
T2  - Environmental Monitoring and Assessment
T1  - Statistical analysis of the influence of major tributaries to the eco-chemical status of the Danube River
VL  - 187
IS  - 9
DO  - 10.1007/s10661-015-4740-y
ER  - 
@article{
author = "Ilijević, Konstantin and Obradović, Marko and Jevremovic, Vesna and Gržetić, Ivan",
year = "2015",
url = "http://cherry.chem.bg.ac.rs/handle/123456789/1956",
abstract = "We have assembled and assessed the statistical procedure which is capable to objectively explore influence of the Danube's major tributaries (the Rivers Tisa, Sava, and Velika Morava) to its eco-chemical status. Procedure contains several tests for measurement of central tendencies: one-way analysis of variance (ANOVA), repeated measures ANOVA, and non-parametric Kruskal-Wallis and Mann-Whitney tests. Various nuisance factors, (outliers, departures from normality, seasonality, and heteroscedasticity) which are present in large data bases, affect the objectivity of central tendency tests; therefore, it was important not only to estimate their robustness, but also to apply proper procedures for detection of the nuisance factors (Grubbs', generalized ESD-extreme Studentized deviate, Kolmogorov-Smirnov, Shapiro-Wilk, turning point, Wald-Wolfowitz runs, Kendall rank, and Levene's tests) and to mitigate their influence (outlier exclusion, Box-Cox, and logarithmic transformations). The analysis of selected eco-chemical parameters: biological oxygen demand-5, chemical oxygen demand, UV extinction at 254 nm, dissolved oxygen, oxygen saturation, total dissolved solids, electrical conductivity, suspended matter, total phosphorus, phosphates, nitrates, ammonia, pH, total alkalinity, m-2p alkalinity, CO2, and temperature, was performed for 15 years period. The Tisa was the most polluted tributary, but its pollution load was not substantial enough to exceed the Danube self-purification potential. The City of Belgrade was also identified as serious pollution source. Assessment of assembled statistical procedure, which was based on the real environmental data, indicates that proposed tests are sufficiently robust to the observed level of nuisance factors with the exception of pronounced seasonality.",
publisher = "Springer, Dordrecht",
journal = "Environmental Monitoring and Assessment",
title = "Statistical analysis of the influence of major tributaries to the eco-chemical status of the Danube River",
volume = "187",
number = "9",
doi = "10.1007/s10661-015-4740-y"
}
Ilijević, K., Obradović, M., Jevremovic, V.,& Gržetić, I. (2015). Statistical analysis of the influence of major tributaries to the eco-chemical status of the Danube River.
Environmental Monitoring and Assessment
Springer, Dordrecht., 187(9).
https://doi.org/10.1007/s10661-015-4740-y
Ilijević K, Obradović M, Jevremovic V, Gržetić I. Statistical analysis of the influence of major tributaries to the eco-chemical status of the Danube River. Environmental Monitoring and Assessment. 2015;187(9)
Ilijević Konstantin, Obradović Marko, Jevremovic Vesna, Gržetić Ivan, "Statistical analysis of the influence of major tributaries to the eco-chemical status of the Danube River" Environmental Monitoring and Assessment, 187, no. 9 (2015),
https://doi.org/10.1007/s10661-015-4740-y .
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