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首页> 外文期刊>RSC Advances >Acquiring an effective CaO-based CO2 sorbent and achieving selective methanation of CO2
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Acquiring an effective CaO-based CO2 sorbent and achieving selective methanation of CO2

机译：获取有效的CaO基二氧化碳吸附剂，实现CO2的选择性甲烷化

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CO _(2) capture, utilization, and storage are promising strategies to solving the problems of superfluous CO _(2) or energy shortage. Here, mechanochemical reduction of CO _(2) by a MgH _(2) /CaH _(2) mixture was first performed, by which we achieve selective methanation of CO _(2) and acquire an effective CaO-based CO _(2) sorbent, simultaneously. The selectivity of methanation is near 100% and the yield of CH _(4) reaches 30%. Four MgO and carbon-doped CaO-based CO _(2) sorbents (MgO/CaO/C, MgO/2CaO/C, MgO/4CaO/C, and MgO/8CaO/C) were formed as solid products in these reactions. Among them, the MgO/4CaO/C sorbent shows high initial adsorption amount of 59.3 wt% and low average activity loss of 1.6% after 30 cycles. This work provides a novel, well-scalable, and sustainable approach to prepare an efficient inert additive-including CaO-based CO _(2) sorbent and selectively convert CO _(2) to CH _(4) at the same time.
机译：CO _（2）捕获，利用和存储是解决多余CO_（2）或能源短缺问题的有希望的策略。这里，首先进行MGH _（2）/ CaH _（2）混合物的CO _（2）的机械化学缩略，通过该机械化学_（2）混合物，通过该机械化学_（2）混合物，通过该CO _（2）的选择性甲烷化，并获得有效的CAO基CO _（ 2）同时吸附。甲烷化的选择性接近100％，CH _（4）的产率达到30％。四种MgO和碳掺杂的CaO基CO _（2）吸附剂（MgO / CaO / C，MgO / 2Co，MgO / 4CaO / C，MgO / 8CaO / C）在这些反应中形成固体产物。其中，MgO / 4CaO / C吸附剂在30次循环后显示出59.3wt％的高初始吸附量为59.3wt％，低平均活动损失为1.6％。这项工作提供了一种新颖，可扩展性和可持续的方法，可制备高效的惰性添加剂 - 包括CaO基CO _（2）吸附剂，并同时选择性地将CO _（2）转换为CH _（4）。

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