Highly regenerable cubic and terraced MgO nanoparticles as CO2 adsorbents for room-temperature wet mineral carbonation.
室温湿式鉱物炭酸化のための高再生可能な立方体およびテラス状MgOナノ粒子CO2吸着剤 (AI 翻訳)
Kyungil Cho, Yeryeong Kang, Min-Cheol Kim, S. Chae, Euntae Yang, Changhyuk Kim
🤖 gxceed AI 要約
日本語
本研究では、エアロゾル合成により作製した立方体およびテラス状のMgOナノ粒子を用いて、室温での湿式炭酸化と800°Cでの熱脱炭酸を15サイクル繰り返し、CO2吸着容量の再現性を調査した。結果、平均21 mmol/g以上の吸着容量を達成し、容量損失は4%未満であった。この高い安定性は、NaやKなどのドーパントを添加した複合材料を上回る性能を示し、廃熱回収と組み合わせた低エネルギー直接空気回収や排ガス処理への応用が期待される。
English
This work investigates the cyclic stability of aerosol-synthesized cubic and terraced MgO nanoparticles for CO2 capture via wet carbonation at room temperature and thermal decarbonation at 800°C. Over 15 cycles, the adsorbents achieved average capture capacities of 21.03 and 21.41 mmol CO2/g with less than 4% capacity loss, outperforming doped composite materials. The high regenerability is attributed to stable pore structures and surface defects, making these materials promising for low-energy direct air capture and flue gas treatment integrated with waste heat recovery.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本では、CCUS技術の実用化が推進されており、特に産業排ガスからのCO2回収が重要視されている。本研究成果は、常温で作動する高性能CO2吸着材を提供し、工場の排熱を利用した低エネルギー回収プロセスに貢献できる可能性がある。
In the global GX context
Globally, CCUS is recognized as essential for meeting net-zero targets, and low-temperature carbon capture with high cyclic stability is a key challenge. This work demonstrates a scalable synthesis of MgO nanoparticles that approach theoretical capture limits, offering a pathway for cost-effective direct air capture and point-source emission reduction.
👥 読者別の含意
🔬研究者:Materials scientists and CCUS researchers can leverage the synthesis method and cyclic stability data to design next-generation solid sorbents.
🏢実務担当者:Companies developing carbon capture technologies can explore the scalability of aerosol-synthesized MgO for integration with industrial waste heat.
🏛政策担当者:Policymakers should note the potential of this material to reduce energy penalties for carbon capture, supporting R&D funding for advanced sorbents.
📄 Abstract（原文）
Mineral carbonation using magnesium oxide (MgO) represents a highly effective pathway for mitigating climate change due to its significant theoretical capacity and environmental safety. To maximize the life-cycle sustainability of this process, the cyclic stability and effective regeneration of MgO adsorbents are critical requirements. In this work, we investigate the repeatability of carbon capture capacities for aerosol-synthesized, high-purity cubic and terraced (C- and T-MgO) nanoparticles through 15 cycles of wet carbonation (WC) at room temperature (∼25 °C) and thermal decarbonation (DC) at 800 °C. Morphological analysis revealed that nano-sized MgO particles were transformed into micro-sized, pillar-shaped magnesium carbonates, primarily artinite and nesquehonite, during the WC phase. Subsequent thermal treatment regenerated the MgO phase, which maintained a porous, pillar-like structure characterized by internal cracks formed during CO2 release. Pore size distributions stabilized after the initial five cycles, providing permanent diffusion channels that ensure consistent kinetic performance. The persistence of high reactivity was supported by the sustained presence of surface oxygen vacancies and defects, as confirmed by XPS analysis. The C- and T-MgO adsorbents achieved average capture capacities of 21.03 and 21.41 mmol CO2/g adsorbent, respectively, with a remarkably low-capacity loss of less than 4% over 15 cycles. These results approached theoretical limits and significantly outperformed previously reported composite materials modified with dopants. This exceptional stability of aerosol-synthesized MgO based adsorbents can be applied for low-energy direct air capture and flue gas treatment as sustainable carbon management strategies by integrated with industrial waste heat recovery or renewable energy infrastructures.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1016/j.jenvman.2026.129968first seen 2026-06-10 05:39:12
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