Effect of Headspace CO2 in Hydrothermal Carbonization of Loblolly Pine for In Situ Functionalization and Its Impact on Carbon Capture.
ロブロリーパインの水熱炭化におけるヘッドスペースCO2のその場機能化と炭素捕捉への影響 (AI 翻訳)
Swarna Saha, Ayden Weil, T. Reza
🤖 gxceed AI 要約
日本語
この研究では、二酸化炭素を反応媒体として利用した水熱炭化により、ロブロリーパインからCO2吸着材を開発。CO2加圧により表面カルボキシル化が促進され、最高17.25 mmol/gのCO2吸着容量を達成。高温ではCO2効果が減少するが、CO2を反応物とターゲットの両方として利用する二重利益アプローチを示した。
English
This study develops a CO2-responsive adsorbent from loblolly pine via hydrothermal carbonization under pressurized CO2. CO2 pressurization enhances surface functionalization and carbon retention, achieving a maximum CO2 adsorption capacity of 17.25 mmol/g. The approach uses CO2 as both a reactant and target, offering a dual-benefit for sustainable 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技術の開発が進んでおり、本研究成果はバイオマス由来の炭素捕捉材料開発に貢献する。特に、CO2を反応媒体として利用するプロセスは、日本のGX政策におけるカーボンリサイクル技術の一環として位置づけられる可能性がある。
In the global GX context
This paper presents a novel approach to producing CO2 adsorbents from biomass, relevant for global carbon capture efforts. The dual use of CO2 as a reactant aligns with circular carbon economy principles, which are gaining traction in international climate policy.
👥 読者別の含意
🔬研究者:Researchers in carbon capture and biomass conversion will find the in situ functionalization method and the optimized adsorption capacity of interest.
🏢実務担当者:Companies developing bio-based carbon capture materials can use these insights for process optimization.
🏛政策担当者:Policymakers supporting CCUS and circular carbon economy should note the potential for integrating CO2 as a reactant in biomass processing.
📄 Abstract（原文）
The steady rise in anthropogenic CO2 emissions from industrial processes and fossil fuel combustion highlights the urgent demand for efficient carbon capture technologies. In this study, loblolly pine was utilized to develop a CO2-responsive adsorbent through hydrothermal carbonization (HTC) under pressurized CO2 atmospheres. By incorporating CO2 as a reactive medium during HTC (200-260 °C), the process simultaneously promoted in situ surface functionalization and carbon retention. The resulting hydrochars were subsequently superactivated with KOH (2:1 ratio) at 800 °C to create ultraporous functionalized activated hydrochar for CO2 uptake applications. Significant enhancements in BET surface area and micropore volume were observed with increasing CO2 pressure across three HTC temperatures. CO2 pressurization facilitated surface carboxylation while suppressing decarboxylation, leading to higher oxygen content and enriched functional groups, particularly carboxylic groups, on the functionalized activated hydrochar hydrochars. These modifications improved both physical adsorption via porosity and chemical adsorption via surface reactivity. The optimized material (H200 P150 psi) achieved a maximum CO2 adsorption capacity of 17.25 mmol/g at 4 bar and 25 °C. However, at elevated HTC temperatures (>230 °C), the influence of CO2 pressure on hydrochar properties diminished, indicating a transition to a temperature-dominated reaction regime. Thermal decomposition and condensation processes override the functionalizing role of CO2, reducing its effectiveness as a reactive medium. Overall, this work presents a dual-benefit approach in which CO2 serves as both a reactant and target which enables sustainable production of functionalized activated hydrochar while contributing to CO2 mitigation.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1021/acs.langmuir.5c04242first seen 2026-05-05 23:34:07
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