In this work, Zr‐doped CaO‐based sorbents were prepared at several kilograms per batch using a simple sol–gel technique. CO₂ adsorption performance and cycling stability of the synthesized sorbents were significantly improved in consequence of the incorporation of Zr component. Technological conditions of the scale‐up production were optimized, including precursor concentration of calcium, amount of citric acid, gelification temperature, and gelification time, which played important roles in the sol–gel preparation process. The factors affecting the carbonation/calcination process of sorbent (volume fraction of CO₂ and calcination temperature) were also investigated. A 4‐kg CaO‐based sorbents, with appropriate nanosize CaO crystallite, loose and porous structure, and uniform distribution of Ca and Zr, have been synthesized successfully at one batch, which exhibited a final CO₂ adsorption capacity of 5.86 mol‐CO₂/kg‐ads under a lower volume fraction of CO₂ (15%) and a higher calcination temperature (900°C) after 45 adsorption/desorption cycles.

中文翻译：

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Zr掺杂的基于CaO的吸附剂的大规模生产和工艺优化，用于二氧化碳捕集

在这项工作中，使用简单的溶胶-凝胶技术以每批次几千克的量制备了Zr掺杂的CaO基吸附剂。由于掺入了Zr成分，因此大大提高了合成吸附剂的CO ₂吸附性能和循环稳定性。优化了规模生产的技术条件，包括钙的前体浓度，柠檬酸的量，胶凝温度和胶凝时间，这些在溶胶-凝胶制备过程中发挥了重要作用。影响吸附剂碳化/煅烧过程的因素（CO _2的体积分数）和煅烧温度）。一次成功合成了4千克CaO基吸附剂，具有适当的纳米级CaO微晶，疏松和多孔的结构以及均匀的Ca和Zr分布，最终吸附的CO ₂吸附能力为5.86 mol-CO ₂ / kg-ads，经过45个吸附/解吸循环后，在较低的CO ₂体积分数（15％）和较高的煅烧温度（900°C）下。