Thermal Decomposition and Dehydration Kinetics of Tetra(piperidinium) Octamolybdate Tetrahydrate in Air

Autor:	Li-na Wang, Zhong-Hai Zhang, Zong-Jun Ku, Keli Zhang, Zhi-Guo Zhang
Rok vydání:	2008
Předmět:	Tetrahydrate biology Inorganic chemistry Kinetics Thermal decomposition General Chemistry Activation energy medicine.disease biology.organism_classification Decomposition chemistry.chemical_compound chemistry Polyoxometalate medicine Tetra Physical chemistry Dehydration
Zdroj:	Chinese Journal of Chemistry. 26:870-874
ISSN:	1001-604X
DOI:	10.1002/cjoc.200890161
Popis:	Thermal decomposition of tetra(piperidinium) octamolybdate tetrahydrate, [C5H10NH2]4[Mo8O26]·4H2O, was investigated in air by means of TG-DTG/DTA, DSC, TG-IR and SEM. TG-DTG/DTA curves showed that the decomposition proceeded through three well-defined steps with DTA peaks closely corresponding to mass loss obtained. Kinetics analysis of its dehydration step was performed under non-isothermal conditions. The dehydration activation energy was calculated through Friedman and Flynn-Wall-Ozawa (FWO) methods, and the best-fit dehydration kinetic model function was estimated through the multiple linear regression method. The activation energy for the dehydration step of [C5H10NH2]4[Mo8O26]·4H2O was 139.7 kJ/mol. The solid particles became smaller accompanied by the thermal decomposition of the title compound.
Databáze:	OpenAIRE
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