Determination of the kinetic parameters of the multi-stage thermal decomposition of solids under non-isothermal conditions by the non-linear estimation approach

1979 ◽  
Vol 17 (2) ◽  
pp. 275-286 ◽  
Author(s):  
J. Leyko ◽  
M. Maciejewski ◽  
R. Szuniewicz
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Parameters ◽  
Linear Estimation ◽  
Isothermal Conditions ◽  
Multi Stage ◽  
Non Linear

Kinetic parameters of the thermal decomposition of cobalt hydroxide nanopowder under isothermal conditions

2020 ◽  
Author(s):  
T.H. Nguyen
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Parameters ◽  
Decomposition Rate ◽  
Cobalt Hydroxide ◽  
Average Particle ◽  
Co3o4 Nanoparticles ◽  
Decomposition Rate Constant ◽  
Isothermal Conditions ◽  
Nano Powder ◽  
Research Show

The paper focuses on the kinetic parameters of synthesizing Co3O4 nano-powder by thermal decomposition of hydroxide Co(OH)2 under isothermal conditions. The thermal decomposition of Co(OH)2 nano-powder under isothermal conditions was carried out in a tube furnace in the temperature range from 150 to 200 °C. Findings of research show that the thermal decomposition rate constant at 200 °C is approximately 2.7 times higher than that at 150 °C. Accordingly, for 80 min of thermal decomposition, the process accelerates 1.8 times. The activation energy of this process is approximately 33 kJ/mol, which indicates a mixed reaction mode. The study shows that Co3O4 nanoparticles obtained at the temperature of the maximum thermal decomposition rate, i.e. 180 °C, mainly consist of elongated ovoid and acicular aggregates with an average particle value of 47 nm and the length of up to 200 nm.

Application of non-linear heating regime for the determination of activation energy and kinetic parameters of solid-state reactions

1998 ◽  
Vol 323 (1-2) ◽  
pp. 101-107 ◽  
Author(s):  
K.V Tomashevitch ◽  
S.V Kalinin ◽  
A.A Vertegel ◽  
N.N Oleinikov ◽  
V.A Ketsko ◽  
...  
Keyword(s):  
Activation Energy ◽  
Solid State ◽  
Kinetic Parameters ◽  
Solid State Reactions ◽  
Heating Regime ◽  
Linear Heating ◽  
Non Linear
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