Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 42: Issue 6
Characterization of the decomposition course of nickel acetate tetrahydrate in air
Authors:
G. Hussein Chemistry Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt

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A. Nohman Chemistry Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt

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K. Attyia Chemistry Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt

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Pages:
1155–1165
Online Publication Date:
09 Jan 2007
Publication Date:
01 Dec 1994
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02546925
Keywords:
nickel acetate tetrahydrate; kinetics
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Abstract  

Thermogravimetry, differential thermal analysis, X-ray diffractometry and infrared spectroscopy showed that Ni(CH3COO)2·4H2O decomposes completely at 500°C, giving rise to a mixture of Nio and NiO. The results revealed that the compound undergoes dehydration at 160°C and melts at 310°C. The water thus released hydrolyses surface acetate groups, acetic acid being evolved into the gas phase. At 330°C, the anhydrous acetate is converted into NiCO3, releasing CH3COCH3 into the gas phase. The carbonate subsequently decomposes (at 365°C) to give NiO(s), CO2(g) and CO(g). On further heating up to 373°C, a mixture of Nio and NiO is formed. Other gas-phase products were detected at 400°C, viz. CH4 and (CH3)2CH=CH2, which were formed in surface reactions involving initial gas-phase products. Non-isothermal kinetic parameters (A and ΔE) were calculated on the basis of temperature shifts experienced in the various decomposition processes as a function of heating rate (2–20 deg·min−1).

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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