超ミクロ孔優位の石炭由来炭素吸着材を構築する低温予備炭化と賦活の結合プロセス：高容量CO2吸着回収に向けて
Coupled Low-Temperature Precarbonization and Activation for Constructing Ultramicropore-Dominant Coal-Derived Carbon Adsorbent for High-Capacity CO 2 Adsorption Capture (原題)
Xiaohan Zhou, Fei Sun, Zhibin Qu, Yingjian Chen, Yang Yu, Chunwei Zhang, Junfeng Li, Min Xie, Shaozeng Sun
🤖 gxceed AI 要約
日本語
石炭由来の多孔質炭素吸着材において、低温予備炭化と低温賦活を組み合わせることで、CO2の動的直径に適合する超ミクロ孔を選択的に発達させる手法を提案。超ミクロ孔容積0.55cm3/gを達成し、25℃・1barで4.69mmol/gという多孔質炭素吸着材として最高水準のCO2吸着量を実現した。炭化・賦活パラメータの調整のみで細孔構造を制御できる簡便なアプローチである。
English
This study proposes coupling low-temperature precarbonization with low-temperature activation to selectively develop ultramicropores in coal-derived porous carbon for CO2 capture. The approach achieves an ultramicropore volume of 0.55 cm3/g and a CO2 uptake of 4.69 mmol/g at 25 °C and 1 bar—among the highest reported for porous carbon adsorbents. Small carbon crystallites formed during precarbonization drive ultramicropore development, and pore architecture can be tuned simply by adjusting carbonization and activation parameters.
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
CCUSは日本のGX実現に向けた重要技術の一つであり、特に分離・回収プロセスの低コスト化は産業界の関心事。本論文は安価な石炭系原料からの高効率CO2吸着材開発であり、国内のCCUS実装研究やカーボンリサイクル政策に関連する基礎的知見を提供する。
In the global GX context
CO2 capture materials are a foundational enabler for CCUS deployment, which features prominently in global net-zero pathways and transition finance taxonomies. This work advances low-cost adsorbent design from abundant coal feedstocks, relevant to industrial decarbonization and carbon capture infrastructure investment.
👥 読者別の含意
🔬研究者:低温予備炭化と低温賦活の結合が超ミクロ孔を選択的に形成する機構は、多孔質材料設計の新たな指針となる。
🏢実務担当者:安価な石炭系原料で高容量CO2吸着材を製造できる可能性を示し、CCUS設備の吸着材コスト低減に資する。
🏛政策担当者:CCUS技術の低コスト化に向けた材料イノベーションの事例として、カーボンリサイクル政策やCCUSロードマップの参考になる。
📄 Abstract（原文）
Abstract Porous carbons from thermochemical activation of heavy carbon feedstocks are promising cost-effective adsorbents for CO2 adsorption capture, in which constructing ultramicropores commensurate with CO2 kinetic diameter is pivotal for achieving high adsorption capacity. Chemical activation involving high-temperature carbonization and activation remains a prevailing route to preparing porous carbon with high specific surface area; however, uncontrolled intense etching reactions at high temperatures inevitably create excessively widened pores that are ineffective for CO2 adsorption, giving rise to limited CO2 uptake. Herein, we proposed a modified strategy coupling low-temperature thermal activation and precarbonization to selectively develop ultramicropores in coal-derived porous carbon. Enabled by this strategy, a high ultramicropore volume of 0.55 cm3/g was constructed, along with a smaller average pore diameter, surpassing the levels achievable by conventional high-temperature chemical activation methods. Statistical analysis of multidimensional structural characteristics reveals that small carbon crystallites formed via the primary thermal pyrolysis of aromatic sheets during low-temperature precarbonization play a key role in ultramicropore development by improving interfacial mass transfer and reactions during low-temperature activation. Benefiting from its well-developed ultramicroporosity, as-prepared porous carbon adsorbent delivers a CO2 uptake of 4.69 mmol/g at 25 °C and 1 bar, ranking among the highest values reported to date for porous carbon adsorbents. This work established a simple approach that markedly improves pore architecture by only adjusting carbonization and activation parameters, enabling rational adaptation to diverse application scenarios.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acs.energyfuels.6c04082first seen 2026-11-07 04:55:36
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