塩化コリン系深共晶溶媒におけるCO2溶解度に対する温度・圧力・組成の影響
Effect of temperature, pressure, and composition on CO 2 solubility in choline chloride-based deep eutectic solvents (原題)
R. Tetrisyanda, Kuswandi Wahyudiono, G. Wibawa
🤖 gxceed AI 要約
日本語
塩化コリン(ChCl)とポリエチレングリコール(PEG-400)からなる深共晶溶媒(DES)について、1:9および1:10のモル比でCO2吸収性能を評価した。303.15K・323.15K、2.7~23barの条件で定容平衡法により溶解度を測定し、圧力増加で溶解度が上昇、温度上昇で低下する物理吸収支配の挙動を確認した。最高CO2モル分率は1:9組成・303.15K・23.10barで0.2826、ヘンリー定数は64.93~71.67barで両組成の差は3%未満だった。PEG含有量のわずかな違いはCO2溶解度に大きな影響を与えないことを示す熱力学的基礎データを提供する。
English
This study measured CO2 solubility in choline chloride–PEG-400 deep eutectic solvents (DESs) at molar ratios of 1:9 and 1:10, using the constant-volume equilibrium method at 303.15–323.15 K and 2.7–23 bar. Solubility rose with pressure and fell with temperature, indicating physical absorption governed by Henry's law. The highest CO2 mole fraction (0.2826) occurred for the 1:9 DES at 303.15 K and 23.10 bar; Henry constants ranged 64.93–71.67 bar with under 3% variation between formulations, showing that small PEG-content changes have limited effect on CO2 uptake.
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がGX推進戦略およびエネルギー基本計画における脱炭素の重点技術と位置づけられ、分離・回収コストの低減が課題となっている。本論文は代替溶媒の基礎物性データを提供するもので、国内のCCUS実証・商用化検討における溶媒選定の参考情報となり得るが、政策・開示制度との直接的な接続は弱い。
In the global GX context
Globally, CCUS is a key pillar of net-zero pathways and transition finance taxonomies, where solvent regeneration energy and cost remain central barriers. This paper contributes fundamental thermodynamic data on a low-volatility DES alternative to MEA, useful for early-stage capture technology assessment, though it does not engage with disclosure frameworks such as TCFD or ISSB.
👥 読者別の含意
🔬研究者:DES系CO2吸収材の熱力学データおよび狭い組成範囲での感度評価の基礎資料として有用。
🏢実務担当者:CCUS設備の溶媒選定・回収プロセス検討における初期スクリーニング情報として参照可能。
📄 Abstract(原文)
Carbon dioxide (CO₂) capture is conventionally performed using aqueous monoethanolamine (MEA), but its industrial application is limited by high regeneration energy, solvent degradation, corrosion, and environmental concerns. Deep eutectic solvents (DESs) have emerged as promising alternatives because of their low volatility, simple preparation, and tunable physicochemical properties. This study investigated the physicochemical characteristics and CO₂ absorption performance of choline chloride (ChCl)-polyethylene glycol (PEG-400) DESs with molar ratios of 1:9 and 1:10. The closely spaced PEG-rich compositions of 1:9 and 1:10 were selected to determine whether a small increase in PEG-400 content produces a measurable improvement in CO₂ absorption. The formation of low-melting DES mixtures was supported by the combined results of FTIR spectroscopy, melting-point, and density measurements. CO₂ solubility was measured at 303.15 and 323.15 K over a pressure range of 2.7–23 bar using the constant-volume equilibrium method. CO₂ solubility increased with pressure and decreased with temperature, indicating a predominantly physical absorption process governed by Henry’s law. The highest CO₂ mole fraction (0.2826) was obtained for the ChCl:PEG-400 (1:9) DES at 303.15 K and 23.10 bar. Henry constants ranged from 64.93 to 71.67 bar with less than 3% variation between the two DES formulations. The obtained CO₂ solubility and Henry-constant data provide a thermodynamic data and evaluating the sensitivity of CO₂ solubility to a narrow PEG-rich composition range for CO₂ capture applications.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1051/epjconf/202638706008first seen 2026-10-03 05:25:12 · last seen 2026-10-07 05:33:13
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