In the pursuit of effective carbon capture technologies, this study presents a novel method for monitoring CO2 absorption in concentrated Monoethanolamine (MEA) solvent systems. Carbon capture is essential for mitigating greenhouse gas emissions, and MEA is a widely used solvent for this purpose. However, real-time and accurate monitoring of CO2 absorption remains a challenge. Here, we introduce a method based on electrical conductivity variations resulting from the interaction between CO2 and MEA. Experimental results demonstrate the feasibility and efficiency of this approach, offering promising prospects for enhanced carbon capture monitoring and process control.

Carbon capture, CO2 absorption, Electrical conductivity

Sang-Jun Han and Jung-Ho Wee. Estimation of CO2 Absorption Capacity via Correlating Measured Electrical Conductivity in a Diethanolamine Solvent System Compared to Monoethanolamine Solvent Systems. Journal of Chemical & Engineering Data 2017, 62 (5) , 1570-1580.

Mengran Li, Erdem Irtem, Hugo-Pieter Iglesias van Montfort, Maryam Abdinejad, Thomas Burdyny. Energy comparison of sequential and integrated CO2 capture and electrochemical conversion. Nature Communications 2022, 13 (1)

Mengran Li, Kailun Yang, Maryam Abdinejad, Chuan Zhao, Thomas Burdyny. Advancing integrated CO 2 electrochemical conversion with amine-based CO 2 capture: a review. Nanoscale 2022, 14 (33) , 11892-11908.

Sang-Jun Han, Jung-Ho Wee. Correlation of CO2 absorption performance and electrical properties in a tri-ethanolamine aqueous solution compared to mono- and di-ethanolamine systems. Environmental Science and Pollution Research 2020, 27 (36) , 44951-44968.

Yingying Liu, Si Lin, Houfang Lu, Changjun Liu, Kejing Wu, Wei Jiang, Bin Liang. Studies on viscosity and conductivity of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-glycerol and CO2-DBU-glycerol solutions at temperatures from 288.1 K to 328.1 K. The Journal of Chemical Thermodynamics 2019, 136 , 16-27.

Gimun Gwak, David Inhyuk Kim, Jungwon Kim, Min Zhan, Seungkwan Hong. An integrated system for CO2 capture and water treatment by forward osmosis driven by an amine-based draw solution. Journal of Membrane Science 2019, 581 , 9-17.

Hao Wu, Bill Buschle, Yunjie Yang, Chao Tan, Feng Dong, Jiabin Jia, Mathieu Lucquiaud. Liquid distribution and hold-up measurement in counter current flow packed column by electrical capacitance tomography. Chemical Engineering Journal 2018, 353 , 519-532.

Sahil Garg, A.M. Shariff, M.S. Shaikh, Bhajan Lal, Asma Aftab, Nor Faiqa. VLE of CO 2 in aqueous potassium salt of L-phenylalanine: Experimental data and modeling using modified Kent-Eisenberg model. Journal of Natural Gas Science and Engineering 2016, 34 , 864-872.