In this section
@article{Aboulrous:2025:10.1016/j.molliq.2025.128111,
author = {Aboulrous, AA and Darraj, NM and Cunsolo, V and Uko, D and Trusler, JPM and Blunt, MJ},
doi = {10.1016/j.molliq.2025.128111},
journal = {Journal of Molecular Liquids},
title = {Effect of imidazolium-based ionic liquid on CO2 sequestration: a study on solubility, interfacial properties, and X-ray imaging in water-wet formations},
url = {http://dx.doi.org/10.1016/j.molliq.2025.128111},
volume = {435},
year = {2025}
}
TY - JOUR
AB - The efficiency of geological CO sequestration is often limited by low CO solubility, which poses challenges for long-term storage stability. This study addresses these limitations by exploring the potential of 1-butyl-3-methylimidazolium bromide (BMIM-Br) to enhance CO storage in water-wet subsurface formations. BMIM-Br was synthesized via a microwave-assisted method and the structure was confirmed using different spectroscopic methods including Fourier Transform Infrared Spectroscopy (FTIR), and Proton Nuclear Magnetic Resonance (1H NMR) analysis.Under conditions of 3 MPa and 323.15 K, the solubility of CO in a 5 wt% BMIM-Br solution was more than double the solubility in pure water. At 0.3 MPa, the interfacial tension (IFT) between CO and the BMIM-Br solution decreased from 36.3 mN/m to 32.9 mN/m at 293.15 and 323.15 K, respectively compared to the pure water values 69.9 mN/m and 63.8 mN/m respectively at the same conditions. When CO2 was injected into a Bentheimer sandstone rock sample fully saturated with the aqueous phase. There was a significant increase in CO saturation (SCO2), rising from 0.58 with pure water to 0.72 with BMIM-Br. The lowered interfacial tension allows more of the pore space to be accessed at the same imposed capillary pressure. When the aqueous phase was injected to displace CO2, the residual saturation was 0.21 with pure water, but only 0.16 for the BMIM-Br solution. This is likely a consequence of increased dissolution of CO2 in BMIM-Br. These results suggest that BMIM-Br significantly improves CO solubility and injectivity by reducing interfacial tension. Its overall impact points to a promising strategy for optimizing CO sequestration in subsurface formations.
AU - Aboulrous,AA
AU - Darraj,NM
AU - Cunsolo,V
AU - Uko,D
AU - Trusler,JPM
AU - Blunt,MJ
DO - 10.1016/j.molliq.2025.128111
PY - 2025///
SN - 0167-7322
TI - Effect of imidazolium-based ionic liquid on CO2 sequestration: a study on solubility, interfacial properties, and X-ray imaging in water-wet formations
T2 - Journal of Molecular Liquids
UR - http://dx.doi.org/10.1016/j.molliq.2025.128111
VL - 435
ER -