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

2001
Authors
Rožić, Ljiljana
Novaković, Tatjana
Jovanović, Nadežda
Terlecki-Baričević, Ana
Grbavčić, Željko
Article (Published version)
Metadata
Show full item recordAbstract
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 transportSource:
Journal of the Serbian Chemical Society, 2001, 66, 4, 273-280Publisher:
- Serbian Chemical Society
Institution/Community
Tehnološko-metalurški fakultetTY - 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 . .