# Fileset

[Abstract_PPC19_LaszloSzabo.doc](https://mdr.nims.go.jp/filesets/5b7a007e-f237-4edb-8b49-2acc076d8a8b/download)

## Creator

SZABO Laszlo, [Mizuki Inoue](https://orcid.org/0000-0003-3098-5448), Yurina Sekine, Ryuhei Motokawa, Yusuke Matsumoto, Thi Thi Nge, [Edhuan Ismail](https://orcid.org/0000-0003-1031-6562), [Izumi Ichinose](https://orcid.org/0000-0002-2236-0942), Tatsuhiko Yamada

## Rights

[In Copyright](http://rightsstatements.org/vocab/InC/1.0/)

## Other metadata

[Lignin-Based Carbon Nanoarchitectures for CO2 Capture Applications](https://mdr.nims.go.jp/datasets/b6e18ec5-e522-410f-bf50-02b50a3fd958)

## Fulltext

Lignin-Based Carbon Nanoarchitectures for CO2 Capture ApplicationsLászló Szabó,1 Mizuki Inoue,2 Yurina Sekine,3 Ryuhei Motokawa,4 Yusuke Matsumoto,1 Thi Thi Nge,1 Edhuan Ismail,2 Izumi Ichinose,2 Tatsuhiko Yamada11Center for Advanced Materials, Forestry and Forest Products Research Institute (FFPRI), 1 Matsunosato, Tsukuba, Ibaraki 305-8687, Japan2Research Center for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan3Promotion Office, Japan Atomic Energy Agency (JAEA), Tokai, Naka-gun, Ibaraki 319-1195, Japan4Materials Sciences Research Center, JAEA, Tokai, Naka-gun, Ibaraki 319-1195, Japan1E-mail: szabo@affrc.go.jpPluronic®surfactantGlycol lignin=Evaporation InducedSelf-Assembly(EISA)2 nm 50 nmLarge-poremesoporous carbonMesopore size range10 nmPoreCarbonizationCarbon capture, utilization and storage technologies are key for the appropriate management of carbon emissions in order to tackle climate change and associated economic and social crisis. Despite worldwide efforts, the large-scale deployment of carbon capture technologies is considered slow on account of the costly nature of existing processes. Amine scrubbing, as the most advanced method with a technology readiness level (TRL) of 9, comprises a chemisorption process followed by an energy-demanding regeneration step that is seen as a major burden on its economic viability.1 Solid-state porous adsorbents, based on physisorptive CO2 capture, are gaining increasing attention as economically more attractive options due to their stability, and the possibility of a more energy-efficient, cost-effective regeneration step.2 Nanoporous (or activated) carbons provide an intriguing platform within this family, as they can be prepared from low-cost biomass, and their pore structure can be tuned through various hard- and soft-templating methods.3 Tuning the pore-structure, i.e., “nanoarchitecturing” unlocks untapped opportunities for CO2 capture, as we have shown in our recent work.4In developing materials for CO2 capture, we need to be careful about the CO2 footprint of the material itself. Lignin has already sequestered biogenic carbon incorporated in its structure (i.e., atmospheric CO2 is captured during photosynthesis and plant growth). When extracted from wood through environmentally benign ways (e.g., using the polyethylene glycol (PEG) solvolysis process developed in our laboratory at FFPRI), lignin can be considered a superior starting material compared to petroleum-based analogues in respect to CO2 footprint. Furthermore, lignin is attractive for the synthesis of carbon materials, as it already has a polyaromatic structure, thus higher conversion yields can be realized compared to other biomass components (like cellulose).We fabricated a unique large-pore mesoporous carbon (Fig. 1) from a PEG-grafted technical lignin (coined as glycol lignin). This material showed an exceptional CO2 capture-and-release profile due to capillary condensation in large mesopores close to the saturation pressure (3.2 MPa) at 270 K. On account of this phenomenon, a more energy-efficient pressure-swing regeneration process can be realized compared to a benchmark nanoporous (activated) carbon. Large-pore mesoporous carbons are considered those that have pores larger than 10 nm, thus cannot be fabricated using conventional soft-templating methods based on Pluronic® surfactants. In this presentation, we will share our latest results on our ongoing efforts in developing a new family of CO2 capture materials based on the nanoconfinement-induced capillary condensation phenomenon, offering energy-efficient, cost effective regeneration options.References1) R. L. Siegelman, E. J. Kim, J. R. Long, Nature Mat., 2021, 20, 1060.2) L. Szabó, W. Thielemans, J. W. Seo, F. Buysschaert, D. D. Dionysiou, V. Vandeginste, RSC Sustainability, 2023, 1, 1354.3) L. Szabó, M. Inoue, Y. Sekine, R. Motokawa, Y. Matsumoto, T. T. Nge, E. Ismail, I. Ichinose, T. Yamada, Preprint available at ChemRxiv, 2024, DOI: 10.26434/chemrxiv-2024-dq8s8-v2Fig. 1. Formation of supramolecular assemblies in a glycol lignin/Pluronic® surfactant system, affording a unique large-pore mesoporous carbon.