Sustainable conversion of strategic industrial wastes and biomass into activated carbons for CO₂ capture: mechanisms, material design, and adsorption performance
産業廃棄物とバイオマスの持続可能な転換によるCO2回収用活性炭：メカニズム、材料設計、吸着性能 (AI 翻訳)
Bartosz Dziejarski
🤖 gxceed AI 要約
日本語
本論文は、産業廃棄物やバイオマスからCO2回収用活性炭を製造する方法を探求。木質バイオマス、廃タイヤ由来のカーボンブラック、リチウムイオン電池の黒鉛を前駆体とし、カリウム活性化により多孔質炭素を合成。細孔径がCO2吸着性能を支配することを明らかにし、バイオマス由来の活性炭が高いCO2容量と安定したサイクル性能を示した。廃棄物の高付加価値化とCO2回収の両立可能性を示す。
English
This thesis explores the production of activated carbons for CO2 capture from industrial wastes and biomass. Using woody biomass, recovered carbon black from tires, and graphite from spent Li-ion batteries as precursors, potassium-assisted activation yields porous carbons. Results show that narrow micropores govern CO2 uptake, with biomass-derived carbons achieving high capacity and stable cycling. The work demonstrates scalable waste valorization for carbon capture.
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技術の推進と廃棄物削減が重要課題。本研究成果は、国内の炭素集約型廃棄物（廃タイヤ、使用済み電池等）の有効活用とCO2回収の統合的ソリューションを提供し、循環型社会の構築に資する。
In the global GX context
Globally, carbon capture is critical for net-zero targets. This paper contributes by turning waste streams into valuable sorbents, aligning with circular economy principles and reducing dependency on virgin materials for CCS infrastructure.
👥 読者別の含意
🔬研究者:Provides design principles for pore engineering in waste-derived carbons for gas separation.
🏢実務担当者:Offers scalable routes to convert industrial wastes into high-value CO2 sorbents, potentially lowering material costs for carbon capture.
🏛政策担当者:Highlights the dual benefit of waste management and carbon capture, supporting policies that incentivize circular carbon technologies.
📄 Abstract（原文）
The increasing concentration of atmospheric CO₂ necessitates sustainable sorbent materials for efficient carbon capture . This thesis explores the valorization of carbon-intensive waste streams into porous carbons for CO₂ capture within a circular materials framework. Three structurally distinct precursors were investigated: woody biomass, recovered carbon black from end-of-life tires, and graphite from spent lithium-ion batteries. Potassium-assisted chemical activation served as a unifying synthesis approach to establish structure–property–performance relationships and assess the chosen materials suitability as solid adsorbents.The effects of precursor structure, activation conditions, and potassium speciation on pore development, carbon framework evolution, and surface chemistry were systematically analyzed. Particular attention was given to adsorption-relevant microporosity and its role in governing CO₂ uptake and CO₂/N₂ selectivity.The obtained results suggested that activation responsiveness was strongly precursor-dependent. Biomass showed the highest reactivity toward KOH, yielding dense microporous networks with BET surface areas up to 2655 m² g⁻¹ and high CO₂ capacities, although excessive activation caused pore widening and performance loss. Recovered carbon black exhibited limited activation due to its compact morphology, leading to mesopore-dominated structures and lower uptake. Recovered graphite was the most resistant, with porosity developing mainly through defect-driven edge etching while preserving graphitic order.CO₂ adsorption across all systems was governed by the presence of narrow micropores rather than total surface area, highlighting that the key performance factor was pore size matching to the kinetic diameter of CO₂ as. KOH provided the highest activation efficiency, while alternative potassium salts enabled milder pore development with improved yield. Oxygen-containing surface groups formed as a result of the activation contributed to adsorption energetics but remained secondary to textural effects under physisorption-controlled conditions.Biomass- and recovered carbon black–derived carbons showed stable cyclic operation and favorable CO₂/N₂ selectivity under dilute and flue-gas-relevant conditions.Beyond adsorption performance, this work demonstrates scalable routes for converting renewable, industrial, and technological carbon residues into high-value porous materials. The results provide design guidelines for precursor selection, activation strategy, and pore engineering in waste-derived carbons for gas separation and related environmental applications.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.63959/chalmers.dt/5904first seen 2026-06-19 04:56:23
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