TY  - JOUR
AU  - Rožić, Ljiljana
AU  - Novaković, Tatjana
AU  - Petrović, Srđan
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/650
AB  - The effect of acid activation on the textural properties of a bentonite from Serbia was investigated using response surface methodology. The influence of activation parameters (temperature, time, acid normality, solid-to-liquid ratio and stirring rate) on the specific surface area, pore volume, pore diameter and bulk density of the activated bentonite samples has been studied using response surface methodology based on central composite rotatable design (CCRD). The specific surface areas of the activated samples were chosen for the selected process response. The quantitative relationship between the specific surface areas and different levels of the quoted factors was used to determine the optimized levels of these factors by CCRD. The analysis of the variance of the quadratic model demonstrates that the response surface methodology was one of the suitable methods to optimize the best operating conditions to maximize the specific surface area of the bentonite. Three dimensional plots are used to demonstrate the relations between the specific surface areas and the paired factors (when the other factors was kept constant) describing the behavior of bentonite in the process of acid activation. The specific surface area and the textural properties of the acid-activated bentonite are strongly affected by the process parameters. The optimum conditions to obtain the maximum specific surface area of acid-activated bentonite were as follows: temperature 90 degrees C, acid normality 4.5, stirring rate 450 rpm, solid-to-liquid ratio of 1:4.5 and duration 3 h. Under these conditions, the experimental values agreed with the values predicted by the analysis of variance, indicating a high fitting accuracy (R(2)=0.927) of the model used and the success of the response surface methodology in optimizing the process parameters of the acid activation of bentonite.
PB  - Elsevier
T2  - Applied Clay Science
T1  - Modeling and optimization process parameters of acid activation of bentonite by response surface methodology
VL  - 48
IS  - 1-2
SP  - 154
EP  - 158
DO  - 10.1016/j.clay.2009.11.043
ER  - 

@article{
author = "Rožić, Ljiljana and Novaković, Tatjana and Petrović, Srđan",
year = "2010",
abstract = "The effect of acid activation on the textural properties of a bentonite from Serbia was investigated using response surface methodology. The influence of activation parameters (temperature, time, acid normality, solid-to-liquid ratio and stirring rate) on the specific surface area, pore volume, pore diameter and bulk density of the activated bentonite samples has been studied using response surface methodology based on central composite rotatable design (CCRD). The specific surface areas of the activated samples were chosen for the selected process response. The quantitative relationship between the specific surface areas and different levels of the quoted factors was used to determine the optimized levels of these factors by CCRD. The analysis of the variance of the quadratic model demonstrates that the response surface methodology was one of the suitable methods to optimize the best operating conditions to maximize the specific surface area of the bentonite. Three dimensional plots are used to demonstrate the relations between the specific surface areas and the paired factors (when the other factors was kept constant) describing the behavior of bentonite in the process of acid activation. The specific surface area and the textural properties of the acid-activated bentonite are strongly affected by the process parameters. The optimum conditions to obtain the maximum specific surface area of acid-activated bentonite were as follows: temperature 90 degrees C, acid normality 4.5, stirring rate 450 rpm, solid-to-liquid ratio of 1:4.5 and duration 3 h. Under these conditions, the experimental values agreed with the values predicted by the analysis of variance, indicating a high fitting accuracy (R(2)=0.927) of the model used and the success of the response surface methodology in optimizing the process parameters of the acid activation of bentonite.",
publisher = "Elsevier",
journal = "Applied Clay Science",
title = "Modeling and optimization process parameters of acid activation of bentonite by response surface methodology",
volume = "48",
number = "1-2",
pages = "154-158",
doi = "10.1016/j.clay.2009.11.043"
}

Rožić, L., Novaković, T.,& Petrović, S.. (2010). Modeling and optimization process parameters of acid activation of bentonite by response surface methodology. in Applied Clay Science
Elsevier., 48(1-2), 154-158.
https://doi.org/10.1016/j.clay.2009.11.043

Rožić L, Novaković T, Petrović S. Modeling and optimization process parameters of acid activation of bentonite by response surface methodology. in Applied Clay Science. 2010;48(1-2):154-158.
doi:10.1016/j.clay.2009.11.043 .

Rožić, Ljiljana, Novaković, Tatjana, Petrović, Srđan, "Modeling and optimization process parameters of acid activation of bentonite by response surface methodology" in Applied Clay Science, 48, no. 1-2 (2010):154-158,
https://doi.org/10.1016/j.clay.2009.11.043 . .

TY  - JOUR
AU  - Dostanić, Jasmina
AU  - Volkov-Husović, Tatjana
AU  - Ušćumlić, Gordana
AU  - Jančić-Heinemann, Radmila
AU  - Mijin, Dušan
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/390
AB  - Binder-oxidizer interactions in rocket composite propellants can be improved using adequate bonding agents. In the present work, the effectiveness of different 1,3,5-trisubstituted isocyanurates was determined by stereo and metallographic microscopy and using the software package Image-Pro Plus. The chemical analysis of samples was performed by a scanning electron microscope equipped for energy dispersive spectrometry.
PB  - Wiley, Hoboken
T2  - Journal of Microscopy
T1  - The influence of bonding agents in improving interactionsin composite propellants determined using image analysis
VL  - 232
IS  - 3
SP  - 530
EP  - 533
DO  - 10.1111/j.1365-2818.2008.02115.x
ER  - 

@article{
author = "Dostanić, Jasmina and Volkov-Husović, Tatjana and Ušćumlić, Gordana and Jančić-Heinemann, Radmila and Mijin, Dušan",
year = "2008",
abstract = "Binder-oxidizer interactions in rocket composite propellants can be improved using adequate bonding agents. In the present work, the effectiveness of different 1,3,5-trisubstituted isocyanurates was determined by stereo and metallographic microscopy and using the software package Image-Pro Plus. The chemical analysis of samples was performed by a scanning electron microscope equipped for energy dispersive spectrometry.",
publisher = "Wiley, Hoboken",
journal = "Journal of Microscopy",
title = "The influence of bonding agents in improving interactionsin composite propellants determined using image analysis",
volume = "232",
number = "3",
pages = "530-533",
doi = "10.1111/j.1365-2818.2008.02115.x"
}

Dostanić, J., Volkov-Husović, T., Ušćumlić, G., Jančić-Heinemann, R.,& Mijin, D.. (2008). The influence of bonding agents in improving interactionsin composite propellants determined using image analysis. in Journal of Microscopy
Wiley, Hoboken., 232(3), 530-533.
https://doi.org/10.1111/j.1365-2818.2008.02115.x

Dostanić J, Volkov-Husović T, Ušćumlić G, Jančić-Heinemann R, Mijin D. The influence of bonding agents in improving interactionsin composite propellants determined using image analysis. in Journal of Microscopy. 2008;232(3):530-533.
doi:10.1111/j.1365-2818.2008.02115.x .

Dostanić, Jasmina, Volkov-Husović, Tatjana, Ušćumlić, Gordana, Jančić-Heinemann, Radmila, Mijin, Dušan, "The influence of bonding agents in improving interactionsin composite propellants determined using image analysis" in Journal of Microscopy, 232, no. 3 (2008):530-533,
https://doi.org/10.1111/j.1365-2818.2008.02115.x . .