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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Mechanism of a reversible CO2 capture monitored by the layered perovskite Li2SrTa2O7
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Mechanism of a reversible CO2 capture monitored by the layered perovskite Li2SrTa2O7

机译：层状钙钛矿Li2SrTa2O7监测可逆CO2捕集的机理

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We demonstrate for the first time, a new CO2 capture ability monitored by a Ruddelsden -Popper compound. Under a humid CO2 atmosphere, Li2SrTa2O7 is transformed into LiHSrTa2O7 releasing lithium hydroxide which combined with the atmospheric CO2 leads to Li2CO3. The presence of carbonate is confirmed by IR, thermal analysis coupled with mass spectroscopy and diffraction experiments (X-ray and neutron). The structural study of LiHSrTa2O7 performed with X-ray and neutron diffraction data showed that the structure differs from that of LiHSrTa2O7 obtained by ionic exchange from Li2SrTa2O7 by the Li+/H+ repartition in the interlayer spacing. In the case of the LiHSrTa2O7 studied in this paper, the Li+ and H+ ions are ordered, while in the other form, each cation is unequally distributed on 2 sites. By heating, Li2SrTa2O7 is recovered showing that the CO2 capture is reversible and the cyclability of the CO2 capture has been tested during six cycles.
机译：我们首次展示了由Ruddelsden -Popper化合物监测的新的CO2捕集能力。在潮湿的CO2气氛下，Li2SrTa2O7转化为LiHSrTa2O7，释放出氢氧化锂，氢氧化锂与大气中的CO2结合生成Li2CO3。通过IR，热分析，质谱和衍射实验（X射线和中子）证实了碳酸盐的存在。用X射线和中子衍射数据进行的LiHSrTa2O7的结构研究表明，该结构与通过Li + / H +重配在Li2SrTa2O7中进行离子交换而在层间间距中获得的LiHSrTa2O7不同。就本文研究的LiHSrTa2O7而言，Li +和H +离子是有序的，而在另一种形式中，每个阳离子在2个位置上分布不均。通过加热，回收了Li2SrTa2O7，表明CO2捕获是可逆的，并且已经在六个循环中测试了CO2捕获的循环性。

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