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The kinetics of the partial dehydration of gibbsite to activated alumina in a reactor for pneumatic transport

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2001
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Authors
Rožić, Ljiljana
Novaković, Tatjana
Jovanović, Nadežda
Terlecki-Baričević, Ana
Grbavčić, Željko
Article (Published version)
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Abstract
The dehidration kinetics of gibbsite to activated alumina was investigated at four different temperatures between 883 K and 943 K in a reactor for pneumatic transport in the dilute two phase flow regime. The first order kinetic behavior of this reaction with respect to the water content of the solid material was proved and an activation energy of 66.5 kJ/mol was calculated. The effect of residence time on the water content is given and compared with theoretical calculations. The water content and other characteristics of the products depend on two main parameters, one is the short residence time and the other is the temperature of the dehydration of gibbsite. The short residence time of the gibbsite particles in a reactor for pneumatic transport prevents crystallization into new phases, as established from XRD analysis data. Reactive amorphous alumina powder, with a specific surface area of 250 m2/g, suitable as a precursor for catalyst supports is obtained.
Keywords:
Activation energy / Dehydration kinetics / Gibbsite / Pneumatic transport
Source:
Journal of the Serbian Chemical Society, 2001, 66, 4, 273-280
Publisher:
  • Serbian Chemical Society

DOI: 10.2298/jsc0104273r

ISSN: 0352-5139

Scopus: 2-s2.0-0035633649
[ Google Scholar ]
15
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5346
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet
TY  - JOUR
AU  - Rožić, Ljiljana
AU  - Novaković, Tatjana
AU  - Jovanović, Nadežda
AU  - Terlecki-Baričević, Ana
AU  - Grbavčić, Željko
PY  - 2001
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5346
AB  - The dehidration kinetics of gibbsite to activated alumina was investigated at four different temperatures between 883 K and 943 K in a reactor for pneumatic transport in the dilute two phase flow regime. The first order kinetic behavior of this reaction with respect to the water content of the solid material was proved and an activation energy of 66.5 kJ/mol was calculated. The effect of residence time on the water content is given and compared with theoretical calculations. The water content and other characteristics of the products depend on two main parameters, one is the short residence time and the other is the temperature of the dehydration of gibbsite. The short residence time of the gibbsite particles in a reactor for pneumatic transport prevents crystallization into new phases, as established from XRD analysis data. Reactive amorphous alumina powder, with a specific surface area of 250 m2/g, suitable as a precursor for catalyst supports is obtained.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - The kinetics of the partial dehydration of gibbsite to activated alumina in a reactor for pneumatic transport
EP  - 280
IS  - 4
SP  - 273
VL  - 66
DO  - 10.2298/jsc0104273r
ER  - 
@article{
author = "Rožić, Ljiljana and Novaković, Tatjana and Jovanović, Nadežda and Terlecki-Baričević, Ana and Grbavčić, Željko",
year = "2001",
abstract = "The dehidration kinetics of gibbsite to activated alumina was investigated at four different temperatures between 883 K and 943 K in a reactor for pneumatic transport in the dilute two phase flow regime. The first order kinetic behavior of this reaction with respect to the water content of the solid material was proved and an activation energy of 66.5 kJ/mol was calculated. The effect of residence time on the water content is given and compared with theoretical calculations. The water content and other characteristics of the products depend on two main parameters, one is the short residence time and the other is the temperature of the dehydration of gibbsite. The short residence time of the gibbsite particles in a reactor for pneumatic transport prevents crystallization into new phases, as established from XRD analysis data. Reactive amorphous alumina powder, with a specific surface area of 250 m2/g, suitable as a precursor for catalyst supports is obtained.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "The kinetics of the partial dehydration of gibbsite to activated alumina in a reactor for pneumatic transport",
pages = "280-273",
number = "4",
volume = "66",
doi = "10.2298/jsc0104273r"
}
Rožić, L., Novaković, T., Jovanović, N., Terlecki-Baričević, A.,& Grbavčić, Ž.. (2001). The kinetics of the partial dehydration of gibbsite to activated alumina in a reactor for pneumatic transport. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 66(4), 273-280.
https://doi.org/10.2298/jsc0104273r
Rožić L, Novaković T, Jovanović N, Terlecki-Baričević A, Grbavčić Ž. The kinetics of the partial dehydration of gibbsite to activated alumina in a reactor for pneumatic transport. in Journal of the Serbian Chemical Society. 2001;66(4):273-280.
doi:10.2298/jsc0104273r .
Rožić, Ljiljana, Novaković, Tatjana, Jovanović, Nadežda, Terlecki-Baričević, Ana, Grbavčić, Željko, "The kinetics of the partial dehydration of gibbsite to activated alumina in a reactor for pneumatic transport" in Journal of the Serbian Chemical Society, 66, no. 4 (2001):273-280,
https://doi.org/10.2298/jsc0104273r . .

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