Liquid structure of quaternary-ammonium ionic liquids-propanol mixtures as CO2 absorber: Role of fluctuation

被引：0
作者：
Nemoto, Fumiya [1 ]
Maruyama, Shusei [1 ]
Ikeda, Kazutaka [2 ,3 ]
Ohshita, Hidetoshi [2 ]
Otomo, Toshiya [2 ]
Abe, Hiroshi [1 ]
机构：
[1] Natl Def Acad, Dept Mat Sci & Engn, 1-10-20 Hashirimizu, Yokosuka, Kanagawa 2398686, Japan
[2] High Energy Accelerator Res Org KEK, Inst Mat Struct Sci, J PARC Ctr, 203-1 Shirakata, Tokai, Ibaraki 3191106, Japan
[3] Comprehens Res Org Sci & Soc CROSS, Neutron Ind Applicat Promot Ctr, 162-1 Shirakata, Tokai, Ibaraki 3191106, Japan
来源：
CHEMICAL PHYSICS LETTERS | 2025年 / 868卷
关键词：
Ionic liquid; Propanol; Fluctuation; Structure; CO2; X-ray scattering; Neutron diffraction; X-RAY-SCATTERING; DYNAMICS; NANOSTRUCTURE; ORIGIN; STATES; WATER; RAMAN;
D O I：
10.1016/j.cplett.2025.142047
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In the mixtures of ionic liquids, consisting of R-N,N,N-trimethylammonium (R = N-propyl, N-butyl, N-hexyl) or N, N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium cations and bis(trifluoromethanesulfonyl)imide (TFSI) anions with 1/2-propanol, N-butyltrimethylammonium TFSI-2-Propanol mixture can store up to 25% CO2 by mole fraction under ambient conditions. In this study, the liquid structure of these systems was analyzed using small-and wide-angle X-ray scattering and neutron diffraction measurements in both air and CO2 environment. As a result, the local structures rarely changed, while the size of concentration fluctuation and the free volume, which can store CO2, grew near the critical points.
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页数：7
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