Sustainable mechanochemical production of amino graphene for enhanced electrothermal carbon dioxide capture
アミノグラフェンの持続可能なメカノケミカル生産による電気熱CO2回収の強化 (AI 翻訳)
Rahul Navik, Ding Xiao, Jia Li
🤖 gxceed AI 要約
日本語
本研究は、ポリアミン支援メカノケミストリー（PAME）を用いて、グラフェンナノシート-ポリエチレンイミン（GNs-PEI）複合材料をスケーラブルに合成し、電気熱スイング吸着（ETSA）によるCO2回収性能を大幅に向上させた。GNs-PEIは高いCO2吸着容量（最大4.77 mmol/g）と選択性（386）を示し、模擬排ガス条件下で優れた性能を発揮した。また、50回の温度スイング吸着脱着サイクル後も88.8%の容量を維持し、ETSAプロセスでは8V印加で1.43℃/sの急速加熱を達成した。
English
This study demonstrates a scalable polyamine-assisted mechanochemistry (PAME) approach to produce graphene nanosheet-polyethyleneimine (GNs-PEI) composites for enhanced electrothermal swing adsorption (ETSA) CO2 capture. GNs-PEI exhibits high CO2 adsorption capacity (up to 4.77 mmol/g) and selectivity (386) under simulated flue gas conditions, with excellent cyclic stability (88.8% retention after 50 cycles). Under ETSA, GNs-PEI foam achieves a rapid heating rate of 1.43 °C/s at 8 V, indicating industrial potential.
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
日本のカーボンニュートラル目標達成には、CCUS技術の革新が不可欠であり、本材料は高効率CO2回収の可能性を示す。特に、既存の化学吸収法に比べてエネルギー消費を抑えられるETSA技術は、日本の排出削減策に貢献し得る。
In the global GX context
This work advances carbon capture materials, relevant to global CCUS deployment and net-zero targets. The scalable synthesis and high performance under humid conditions address key barriers for industrial post-combustion capture, aligning with global efforts to reduce capture costs and energy penalties.
👥 読者別の含意
🔬研究者:Provides a novel scalable synthesis method for functional graphene composites with high CO2 capture performance, useful for materials science and CCUS research.
🏢実務担当者:Offers a potential adsorbent for post-combustion CO2 capture with low energy regeneration via ETSA, relevant for power and industrial sectors.
🏛政策担当者:Highlights the potential of advanced materials to improve CCUS efficiency, supporting policy incentives for carbon capture technology development.
📄 Abstract（原文）
Abstract Graphene-based materials are particularly attractive for electrothermal swing adsorption (ETSA)-driven CO 2 capture because of their exceptional electrical and thermal conductivities. However, the intrinsic chemical inertness of pristine graphene hinders preferential CO 2 binding from gas mixtures, yielding low adsorption capacity and poor selectivity. In addition, the scalable production of functional graphene for industrial-level CO 2 capture remains a critical challenge. Herein, polyamine-assisted mechanochemistry (PAME) is demonstrated as an impactful and scalable approach for producing ultrathin graphene nanosheet-polyethyleneimine (GNs-PEI) composites. Density functional theory (DFT) calculations reveal strong binding interactions of 0.183 J/m 2 between graphite and polyamine, which facilitate simultaneous exfoliation and functionalization during the PAME process. The yielded GNs-PEI exhibits a high aspect ratio of 201 and an amine content of approximately 38.23 wt%. The GNs-PEI exhibited a CO 2 adsorption capacity of up to 4.77–3.44 mmol/g and a selectivity of 386 − 122 under simulated flue gas conditions (CO 2 /N 2 ratio of 15/85) at 25–55 ℃, respectively. Furthermore, GNs-PEI achieved dynamic CO 2 capacities of 3.06–3.62 mmol/g (dry) and 3.37–4.21 mmol/g (85% RH) at 25 and 50 ℃, suitable for industrial post-combustion capture. Also, the GNs-PEI demonstrated wonderful cyclic stability, retaining over 88.8% of its initial adsorption capacity after 50 temperature-swing adsorption-desorption cycles. Under a simulated ETSA process, GNs-PEI foam showed a prominent heating rate of 1.43 ℃/s at an applied bias of 8 V.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1007/s42114-026-01996-0first seen 2026-08-01 05:33:58
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