0028622 - UCHP-M 20050110 RIV US eng J - Journal Article
Hartman, Miloslav - Trnka, Otakar - Šolcová, Olga
Thermal Decomposition of Aluminium Chloride Hexahydrate.
[Tepelný rozklad AlCl3.6H2O.]
Industrial and Engineering Chemistry Research. Roč. 44, č. 17 (2005), s. 6591-6598. ISSN 0888-5885. E-ISSN 1520-5045
R&D Projects: GA ČR(CZ) GA203/02/0002
Institutional research plan: CEZ:AV0Z40720504
Keywords : aluminum chloride hexahydrate * thermal decomposition * reaction kinetics
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
Impact factor: 1.504, year: 2005

The decomposition rate of aluminum chloride hexahydrate (AlCl3.6H2O) was measured as weight loss at ambient pressure and elevated temperatures up to 270oC. Such incomplete, thermal decomposition produces a porous and reactive basic aluminum chloride [Al2O3.2HCl.2H2O or Al2(OH)4Cl2.H2O] which dissolves in water to give poly(aluminum chloride) used as an efficient flocculation agent. A slowly rising-temperature method and very small sample masses, which minimize heat and mass transfer intrusions, were employed to determine intrinsic reaction rates. A fractional order kinetic equation of Arrhenius type was proposed for the decomposition and tested also against the results amassed by experiment in a constant temperature mode. This correlation allows the estimation of the reaction rate as a function of temperature and the extent of decomposition. It can readily be employed in modeling and simulation of the decomposition process.

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Permanent Link: http://hdl.handle.net/11104/0118544