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

<table>Weight gain associated with carbonatation of La2O3 (first step): exothermic peak at <svg height="11.225" id="M43" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 28.025 11.225" width="28.025" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,11.225)">
<g transform="translate(72,-63.02)">
<text transform="matrix(1,0,0,-1,-71.95,63.24)">
<tspan style="font-size: 12.50px; " x="0" y="0">5</tspan>
<tspan style="font-size: 12.50px; " x="6.2515001" y="0">2</tspan>
<tspan style="font-size: 12.50px; " x="12.503" y="0">0</tspan>
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<text transform="matrix(1,0,0,-1,-53.2,68.56)">
<tspan style="font-size: 8.75px; " x="0" y="0">∘</tspan>
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</svg>C linked with weight gain due to formation of the monoclinic La2O2CO3 phase; endothermic peak due to decarbonatation of La2O2CO3 phase and formation of final La2O3 (second step).</table>

Advances in Materials Science and Engineering

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Figure 1

Figure 1: Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3 System under CO2 Gas Flows