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Kinetic study of the thermal dehydration of layered [Ni2Al(OH)6]2SO4.nH 2O

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Abstract

The kinetics of thermal dehydration of [Ni2Al(OH)6]2SO4.nH2O has been studied through the analysis of isothermal weight loss data. The results obtained seem to indicate that the process is governed by a diffusion mechanism up to anα value which is dependent on the temperature. An explanation is provided for this behaviour on the basis of the structural properties of the compound and the nature of the water loss.

Zusammenfassung

Die Kinetik der thermischen Dehydratisierung von [Ni2Al(OH)6]2SO4.nH2O wurde mittels isothermer TG untersucht. Die Ergebnisse scheinen darauf hinzudeuten, daß der Prozeß bis zu einem von der Temperatur abhängigen α-Wert von einem Diffusionsmechanismus bestimmt wird. Für dieses Verhalten wird basierend auf den strukturellen Eigenschaften der Verbindung und der Natur der Wasserabgabe eine Erklärung gegeben.

Резюме

Посредством анализа данных изотермическ ой потери веса, изучена к инетика термической дегидра тации [Ni2Al(OH)6]2SO4.nH2O. Полученные результа ты показали, что процесс протекает по диффузионному механ изму до степени, зависящей от температуры. Исходя из структуры соедине ния и типа потери воды, приведено объяснение такому по ведению.

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Authors and Affiliations

  1. Departamento de Quimica Inorgánica, Facultad de Ciencias, Universidad de Córdoba, Argentine

    M. J. Hernández, M. A. Ulibarri & J. Cornejo

  2. Centro de Edafología y Biología Aplicada del Cuarto, C.S.I.C., Sevilla, Spain

    J. Cornejo

Authors
  1. M. J. Hernández
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  2. M. A. Ulibarri
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  3. J. Cornejo
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Hernández, M.J., Ulibarri, M.A. & Cornejo, J. Kinetic study of the thermal dehydration of layered [Ni2Al(OH)6]2SO4.nH 2O. Journal of Thermal Analysis 31, 633–641 (1986). https://doi.org/10.1007/BF01914241

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  • DOI: https://doi.org/10.1007/BF01914241

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