Advances in Materials Science and Engineering

Research Article

Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3 System under CO2 Gas Flows

Table 1

Parameters extracted from Avrami’s model: π‘˜ 1 and π‘˜ 2 kinetics parameters and 𝑝 1 and 𝑝 2 exponents, respectively, associated with the fast and slow regimes (1st and 2nd periods).
1st period2nd period
𝑇 (Β°C)Time range (min) π‘˜ 1 𝑝 1 Time range (min) π‘˜ 2 𝑝 2
450 4 5 β†’ 1 1 2 1.5 10-73.3 1 6 7 β†’ 3 2 0 0.020.9
480 6 β†’ 1 7 1.4 10-53.9 3 0 β†’ 9 0 0.540.3
500 3 β†’ 7 1.2 10-33.4 3 0 β†’ 9 0 1.100.2
Activation energies 𝐸 1 ( π‘˜ 1 )7.6 (eV)Activation energies 𝐸 2 ( π‘˜ 2 )2.8 (eV)