Abstract The effects of transition metal doping of calcium carbonate on the subsequent performance of the material during CO2 release and recapture have been evaluated for calcination under low-pressure (~0.1 mbar) water vapour and water plasma conditions. The initial samples were prepared by precipitation method from analytical grade carbonate, calcium and transition metal (Fe, Co, Zn, Cu and Ni) containing precursors. The release-recapture properties of the sorbents were monitored over five cycles involving calcination at 1200 K and carbonation at 825 K. The most noteworthy effects were observed for the Zn-doped samples, which exhibited rapid CO2 recapture. Calcination in H2O plasma was tested to evaluate the potential for in-situ material processing as a means to counteract material degradation. The impact of plasma exposure during calcination on the looping performance was mixed and dependent on the specific sample composition. The performance of the Zn-doped CaCO3 was consistently improved by plasma calcination, yielding high uptake and better retention of carrying capacity over the five cycles. All samples exhibited a deterioration in carrying capacity over repeated cycles. The Zn-doped samples also performed best in this respect (least loss of carrying capacity). The beneficial effects of Zn-doping were dependent on the Zn-content of the precursor solutions used for material synthesis.

中文翻译：

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过渡金属掺杂的 CaCO3 在低压 H2O 蒸汽和 H2O 等离子体中循环 CO2 捕获和释放过程中的性能

摘要 在低压 (~0.1 毫巴) 水蒸气和水等离子体条件下，对碳酸钙的过渡金属掺杂对材料在 CO2 释放和回收过程中的后续性能的影响进行了评估。初始样品是通过沉淀法从含有前体的分析级碳酸盐、钙和过渡金属（Fe、Co、Zn、Cu 和 Ni）制备的。在 1200 K 下煅烧和 825 K 下碳化的五个循环中监测了吸附剂的释放-再捕获特性。最值得注意的影响是锌掺杂样品，其表现出快速的 CO2 再捕获。测试在 H2O 等离子体中煅烧以评估原位材料加工作为抵消材料降解手段的潜力。煅烧期间等离子体暴露对成圈性能的影响是混合的，并且取决于具体的样品组成。通过等离子体煅烧，Zn 掺杂的 CaCO3 的性能不断提高，在五个循环中产生高吸收和更好的承载能力保持。所有样品在重复循环后都表现出承载能力下降。Zn 掺杂的样品在这方面也表现最好（承载能力损失最小）。锌掺杂的有益效果取决于用于材料合成的前体溶液的锌含量。在五个循环中产生高吸收率和更好的承载能力。所有样品在重复循环后都表现出承载能力下降。Zn 掺杂的样品在这方面也表现最好（承载能力损失最小）。锌掺杂的有益效果取决于用于材料合成的前体溶液的锌含量。在五个循环中产生高吸收率和更好的承载能力。所有样品在重复循环后都表现出承载能力下降。Zn 掺杂的样品在这方面也表现最好（承载能力损失最小）。锌掺杂的有益效果取决于用于材料合成的前体溶液的锌含量。