的CaO / CuO的空心微球的一种简便一锅合成设有高度多孔壳用于增强的CO <sub>2</sub>捕获在组合的Ca-Cu系循环处理<em>通过</em>无模板合成方法<a href="#fn1" title="提供电子补充信息（ESI）：实验性能测试；台式固定床反应器示意图； CaO / CuO（1）-0.4-180-24和CaO / CuO（1）-0.24-120-24的形态; CaO / CuO（1）-0.24-180-12的TEM图像; 未经水热处理或没有甘氨酸合成的CaO / CuO复合材料的SEM图像； CaO / CuO（1）-0.24-180-24的SEM-EDX映射; CaO / CuO（1）-0.24-180-24在不同反应条件下的CO2捕集性能和氧化还原特性的比较; 五个重复循环后的CaO / CuO（1）-0.24-180-24的TEM图像; 十个重复循环后破碎的CaO / CuO（1）-0.24-180-24的SEM图像; 重复循环前后CaO / CuO复合材料的孔径分布； CaO / CuO空心微球（CaO / CuO（1）-0.4-180-24）在重复煅烧/还原过程中的XRD图谱，氧化和碳化循环；不同合成方法制备的CaO / CuO复合材料的CO 2捕集性能；重复循环前后CaO / CuO复合材料的孔隙率表征。参见DOI：10.1039 / c9ta04513a">†</a>,Journal of Materials Chemistry A

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的CaO / CuO的空心微球的一种简便一锅合成设有高度多孔壳用于增强的CO ₂捕获在组合的Ca-Cu系循环处理通过无模板合成方法 †
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2019-07-25 00:00:00 , DOI: 10.1039/c9ta04513a
Jian Chen _{1,

2,

3,

4,

5} , Lunbo Duan _{1,

2,

3,

4,

5} , Tian Shi _{1,

2,

3,

4,

5} , Ruoyu Bian _{1,

2,

3,

4,

5} , Yuxiao Lu _{1,

2,

3,

4,

5} , Felix Donat _{6,

7,

8,

9} , Edward J. Anthony _{10,

11,

12}

Affiliation

高性能双功能CaO / CuO复合材料的制备对于联合Ca-Cu环化工艺的发展至关重要，在该工艺中，原位使用甲烷将CuO放热还原以提供煅烧CaCO ₃所需的热量。然而，尽管CaO / CuO复合材料具有出色的氧化还原特性，但其对CO ₂吸收的迅速下降仍然是一个有待解决的重要问题。在本文中，我们报告了一种简便的无一锅无模板合成方法来生产CaO / CuO中空微球，旨在增强CaO / CuO复合材料的CO ₂捕获性能。CaO / CuO中空微球具有高度多孔的外壳和均匀的元素分布，并显示出显着增强的CO ₂捕获性能。在固定床反应器中重复十次循环后，性能最佳的CaO / CuO中空微球的CO ₂吸收能力超过了参考材料，即通过湿法混合或共沉淀法合成的CaO / CuO复合材料的CO ₂吸收能力，分别减少222％和114％。此外，从第8个循环开始，在测试的20个循环中，CO _2的吸收非常稳定，这表明CaO / CuO中空微球具有良好的循环稳定性。O _2的吸收容量大于0.13 g _{O ₂} g_材料^-1时，氧化总是快速进行的。基于N ₂吸附，扫描电子显微镜（SEM）和透射电子显微镜（TEM）表征，CaO / CuO空心微球的CO ₂捕集性能显着提高，这是由于独特的空心微球结构具有高度多孔的壳，这些壳在整个循环操作过程中均得以保留。

"点击查看英文标题和摘要"

A facile one-pot synthesis of CaO/CuO hollow microspheres featuring highly porous shells for enhanced CO2 capture in a combined Ca–Cu looping process via a template-free synthesis approach†

The preparation of bifunctional CaO/CuO composites with high performance is essential for the development of the combined Ca–Cu looping process, in which the exothermic reduction of CuO with methane is used in situ to provide the heat required to calcine CaCO₃. However, the rapid decline in CO₂ uptake of CaO/CuO composites remains an important problem to be solved, despite their excellent redox characteristic. Herein we report a facile one-pot template-free synthesis approach to yield CaO/CuO hollow microspheres, aimed at enhancing the CO₂ capture performance of CaO/CuO composites. CaO/CuO hollow microspheres feature highly porous shells and a homogeneous elemental distribution, and demonstrate significantly enhanced CO₂ capture performance. After ten repeated cycles in a fixed-bed reactor, the CO₂ uptake capacity of the best-performing CaO/CuO hollow microspheres exceeded that of the reference materials, i.e., CaO/CuO composites synthesized via wet mixing or a co-precipitation method, by 222% and 114%, respectively. Moreover, from cycle number eight onwards, the CO₂ uptake was very stable over the tested 20 cycles, suggesting good cyclic stability of CaO/CuO hollow microspheres. Oxidation was always fast with O₂ uptake capacities greater than 0.13 g_O₂ g_material⁻¹. On the basis of N₂ adsorption, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations, the significantly enhanced CO₂ capture performance of the CaO/CuO hollow microspheres resulted from the unique hollow microsphere structure with highly porous shells, which were retained throughout the cyclic operations.

更新日期：2019-07-25

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