Authors:
S. Yamada Kyushu University Research and Development Center for Higher Education 4-2-1 Ropponmatsu Fukuoka 810-8560 Japan

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E. Tsukumo Hiroshima University Chemistry Laboratory, Graduate School of Education 1-1-1 Kagamiyama Higashi-Hiroshima 739-8524 Japan

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N. Koga Hiroshima University Chemistry Laboratory, Graduate School of Education 1-1-1 Kagamiyama Higashi-Hiroshima 739-8524 Japan

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Abstract  

The influences of atmospheric CO2 and H2O on the kinetics of the thermal decomposition of zinc carbonate hydroxide, Zn5(CO3)2(OH)6, were investigated by means of controlled rate evolved gas analysis (CREGA) coupled with TG. Although CO2 and H2O were evolved simultaneously in a single mass-loss step of the thermal decomposition, different effects of those evolved gases on the kinetic rate behavior were observed. No distinguished effect of atmospheric CO2 was detected within the possible range of self-generated CO2 concentration. On the other hand, apparent acceleration effect by the increase in the concentration of atmospheric H2O was observed as the reduction of reaction temperature during the course of constant rate thermal decomposition. The catalytic effect was characterized by the decrease in the apparent activation energy for the established reaction with increasing the concentration of atmospheric H2O, accompanied by the partially compensating decrease in the pre-exponential factor.

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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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