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首页> 外文期刊>RSC Advances >Operando Raman spectroscopic studies of lithium zirconates during CO2 capture at high temperature
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Operando Raman spectroscopic studies of lithium zirconates during CO2 capture at high temperature

机译：高温CO2捕获过程中锂锆酸锂的Operando拉曼光谱研究

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Li _(2) ZrO _(3) based sorbents were synthesized for CO _(2) capture at high temperature between 500 and 700 °C. Monoclinic ZrO _(2) , tetragonal Li _(2) ZrO _(3) , Li _(2) CO _(3) , K _(2) CO _(3) and LiKCO _(3) phases were detected by XRD and Raman spectroscopy. The sorbents showed high stability and moderate capture efficiency. The addition of K resulted in the improvement of capture efficiency from 0.052 g CO _(2) g mat ~(?1) in materials without K to 0.083 g CO _(2) g mat ~(?1) in the doped solid. Here, we report an experimental setup of Raman spectroscopy coupled with online mass spectrometry and a demonstration of its capabilities using lithium zirconates as sorbents for high temperature CO _(2) capture. Operando Raman spectroscopy allowed us to follow up the phase evolution during the capture process for the first time. The results obtained confirmed the presence of molten K and Li carbonates when the K-doped zirconates were exposed to CO _(2) at 500 °C.
机译：Li _（2）ZrO _（3）基于Co _（2）在500至700°C的高温下合成的ZrO _（2）的吸附剂。单斜螺旋_（2），四方Li _（2）ZrO _（3），Li _（2）CO _（3），k _（2）CO _（3）和LIKCO _（3）阶段被检测到XRD和拉曼光谱。吸附剂显示出高稳定性和中等捕获效率。 k的添加导致在没有K至0.083g CO _（2）g mat〜（α1）的材料中从0.052g co _（2）g垫〜（α1）的捕获效率提高。在这里，我们报告了一种与在线质谱耦合的拉曼光谱的实验设置，并使用锂锆作为高温CO _（2）捕获的吸附剂来证明其能力。 Operando拉曼光谱允许我们首次在捕获过程中跟进相位演变。当K掺杂的锆酸盐暴露于500℃时，得到的结果证实了当K掺杂的锆酸盐暴露于CO _（2）时的熔融K和Li碳酸盐。

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