In this experiment, limestone monoliths were 3D printed using a novel limestone mixture, then tested inside of a fixed bed reactor. This represents to the author’s knowledge the first use of 3D printed monoliths in calcium looping. Four monoliths with different infill geometries were tested and compared against a random packing and limestone powder. Comparison was made through the adsorptive capacity of CO₂, and the pressure drop across the column. Calcination was done at 850 °C, under pure N₂, whereas carbonation was conducted at 650 °C with 15% CO₂, balance N₂. The adsorptive performance of these monoliths was in line with the traditional limestone powder on a millimole CO₂/g_sorbent basis, but the pressure drop across the column was reduced by ∼58% on average.

中文翻译：

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用于钙循环中 CO2 捕获的 3D 打印石灰石整体


在本实验中，使用新型石灰石混合物 3D 打印石灰石整体，然后在固定床反应器内进行测试。据作者所知，这代表了 3D 打印巨石在钙循环中的首次使用。测试了四个具有不同加密几何形状的单体，并与散堆填料和石灰石粉末进行了比较。通过 CO₂ 的吸附容量和整个色谱柱的压降进行比较。煅烧在 850 °C 下，纯 N₂ 下进行，而碳酸化在 650 °C 下进行，CO₂ 为 15%，其余为 N₂。这些整体的吸附性能与以毫摩尔 CO₂/g_吸附剂为基础的传统石灰石粉末一致，但整个塔的压降平均降低了约 58%。