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Although microporous carbons with high surface areas and pore volumes can perform well for CO2 separations under high pressure conditions, their energy-demanding regeneration may render them a less attractive material option. Here, we developed a large-pore mesoporous carbon with pore sizes centered around 20-30 nm using a templated technical lignin. During the soft-templating process, unique cylindrical supramolecular assemblies form from the copolymer template, distinct from other systems reported thus far. This peculiar nanostructuring takes place due to the presence of polyethylene glycol (PEG) segments on both the Pluronic® template and the PEG-grafted lignin derivative (glycol lignin). A large increase in CO2 uptake occurs on the resulting large-pore mesoporous carbon at 270 K close to the saturation pressure, owing to capillary condensation. This phenomenon enables outstanding CO2/CH4 selectivity, and a swift regeneration process with desorbed CO2 per unit pressure far outperforming other nanoporous carbons. We propose large-pore mesoporous carbons as a novel family of CO2 capture adsorbents, based on the phase-transition behavior shift of CO2 in the nanoconfined environment, that is, the early condensation of CO2 in mesopores below the bulk saturation pressure under relevant conditions. This novel concept may open new horizons for physisorptive CO2 separations with energy-efficient regeneration options.

権利情報:

• In Copyright
  This is the peer reviewed version of the following article: L. Szabó, M. Inoue, Y. Sekine, R. Motokawa, Y. Matsumoto, T. T. Nge, E. Ismail, I. Ichinose, T. Yamada, ChemSusChem 2025, 18, e202402034, which has been published in final form at https://doi.org/10.1002/cssc.202402034. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

キーワード: Carbon dioxide fixation, Lignin, Mesoporous carbon, Regeneration, Template synthesis

刊行年月日: 2025-05-19

出版者: Wiley

掲載誌:

• ChemSusChem (ISSN: 18645631) vol. 18 issue. 10 e202402034

研究助成金:

• Ministry of Agriculture, Forestry and Fisheries J008722
• Japan Society for the Promotion of Science 24K01409

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5889

公開URL: https://doi.org/10.1002/cssc.202402034

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更新時刻: 2026-01-28 16:30:10 +0900

MDRでの公開時刻: 2026-01-28 14:15:41 +0900