Reactive amorphous aluminas with a high surface area, suitable as a precursor for catalyst supports, are obtained by flash calcination of gibbsite in a reactor for pneumatic transport in the dilute two phase flow regime. In the present paper we study the effects of the gibbsite dehydration temperature on the textural and fractal properties of activated aluminas. The parameters of the pore structure for all samples were evaluated from nitrogen adsorption-desorption isotherms. On the basis of the sorption-structure analysis, the fractal dimension of the aluminas surface were determined by three methods, according to Pfeifer and Avnir, Neimark et al. and Mahnke and Mögel, with a goal to compare obtained values. As expected, a good agreement between the results of these methods was achieve. The values of the fractal dimension of activated aluminas increase with the increase of the temperature of thermal treatment, indicating that the irregularities of their surfaces are greater.
TY - JOUR
AU - Rožić, Ljiljana
AU - Petrović, Srđan
AU - Novaković, Tatjana
AU - Čupić, Željko
AU - Grbavčić, Željko
AU - Jovanović, Dušan
PY - 2006
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/5872
AB - Reactive amorphous aluminas with a high surface area, suitable as a precursor for catalyst supports, are obtained by flash calcination of gibbsite in a reactor for pneumatic transport in the dilute two phase flow regime. In the present paper we study the effects of the gibbsite dehydration temperature on the textural and fractal properties of activated aluminas. The parameters of the pore structure for all samples were evaluated from nitrogen adsorption-desorption isotherms. On the basis of the sorption-structure analysis, the fractal dimension of the aluminas surface were determined by three methods, according to Pfeifer and Avnir, Neimark et al. and Mahnke and Mögel, with a goal to compare obtained values. As expected, a good agreement between the results of these methods was achieve. The values of the fractal dimension of activated aluminas increase with the increase of the temperature of thermal treatment, indicating that the irregularities of their surfaces are greater.
PB - Elsevier
T2 - Chemical Engineering Journal
T1 - Textural and fractal properties of CuO/Al 2 O 3 catalyst supports
VL - 120
IS - 1-2
SP - 55
EP - 61
DO - 10.1016/j.cej.2006.03.027
ER -
@article{
author = "Rožić, Ljiljana and Petrović, Srđan and Novaković, Tatjana and Čupić, Željko and Grbavčić, Željko and Jovanović, Dušan",
year = "2006",
abstract = "Reactive amorphous aluminas with a high surface area, suitable as a precursor for catalyst supports, are obtained by flash calcination of gibbsite in a reactor for pneumatic transport in the dilute two phase flow regime. In the present paper we study the effects of the gibbsite dehydration temperature on the textural and fractal properties of activated aluminas. The parameters of the pore structure for all samples were evaluated from nitrogen adsorption-desorption isotherms. On the basis of the sorption-structure analysis, the fractal dimension of the aluminas surface were determined by three methods, according to Pfeifer and Avnir, Neimark et al. and Mahnke and Mögel, with a goal to compare obtained values. As expected, a good agreement between the results of these methods was achieve. The values of the fractal dimension of activated aluminas increase with the increase of the temperature of thermal treatment, indicating that the irregularities of their surfaces are greater.",
publisher = "Elsevier",
journal = "Chemical Engineering Journal",
title = "Textural and fractal properties of CuO/Al 2 O 3 catalyst supports",
volume = "120",
number = "1-2",
pages = "55-61",
doi = "10.1016/j.cej.2006.03.027"
}
Rožić, L., Petrović, S., Novaković, T., Čupić, Ž., Grbavčić, Ž.,& Jovanović, D.. (2006). Textural and fractal properties of CuO/Al 2 O 3 catalyst supports. in Chemical Engineering Journal
Elsevier., 120(1-2), 55-61.
https://doi.org/10.1016/j.cej.2006.03.027
Rožić L, Petrović S, Novaković T, Čupić Ž, Grbavčić Ž, Jovanović D. Textural and fractal properties of CuO/Al 2 O 3 catalyst supports. in Chemical Engineering Journal. 2006;120(1-2):55-61.
doi:10.1016/j.cej.2006.03.027 .
Rožić, Ljiljana, Petrović, Srđan, Novaković, Tatjana, Čupić, Željko, Grbavčić, Željko, Jovanović, Dušan, "Textural and fractal properties of CuO/Al 2 O 3 catalyst supports" in Chemical Engineering Journal, 120, no. 1-2 (2006):55-61,
https://doi.org/10.1016/j.cej.2006.03.027 . .
