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Article

New Spectrophotometric Method for Quantitative Characterization of Density-Driven Convective Instability

by 1,2,†, 3,4,†, 5, 5,* and 1,*
1
Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
2
College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
3
School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
4
Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
5
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this manuscript.
Academic Editors: Alexis Darras and Benoit Scheid
Polymers 2021, 13(4), 661; https://doi.org/10.3390/polym13040661
Received: 15 January 2021 / Revised: 19 February 2021 / Accepted: 20 February 2021 / Published: 23 February 2021
(This article belongs to the Special Issue Complex Fluids and Interfaces)
CO2 convective dissolution has been regarded as one of the fundamental mechanisms to accelerate the mass transfer of CO2 into brine. We present a new spectrophotometric method to characterize the convective instability and measure the dissolved CO2 mass, which enables the real-time quantitative visualization of CO2/brine transport mechanisms. Successive images were captured to identify the finger development regimes, and the convection morphologies were analyzed by the fingers length and affected area. CO2 solubility was experimentally studied, and the results are in agreement with the theoretical calculations. CO2 mass transfer flux was investigated as the Sherwood number changed. The increase in salinity and temperature has a negative effect on CO2 dissolution; here, numerical simulation and experimental phenomena are qualitatively consistent. In general, these findings confirm the feasibility of the method and improve the understanding of the physical process of CO2 convective dissolution, which can help assess the CO2 solubility trapping mass. View Full-Text
Keywords: convective dissolution; dissolved CO2 mass measurements; spectrophotometric method; CO2 storage in saline formations convective dissolution; dissolved CO2 mass measurements; spectrophotometric method; CO2 storage in saline formations
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MDPI and ACS Style

Teng, Y.; Wang, P.; Jiang, L.; Liu, Y.; Wei, Y. New Spectrophotometric Method for Quantitative Characterization of Density-Driven Convective Instability. Polymers 2021, 13, 661. https://doi.org/10.3390/polym13040661

AMA Style

Teng Y, Wang P, Jiang L, Liu Y, Wei Y. New Spectrophotometric Method for Quantitative Characterization of Density-Driven Convective Instability. Polymers. 2021; 13(4):661. https://doi.org/10.3390/polym13040661

Chicago/Turabian Style

Teng, Ying, Pengfei Wang, Lanlan Jiang, Yu Liu, and Yang Wei. 2021. "New Spectrophotometric Method for Quantitative Characterization of Density-Driven Convective Instability" Polymers 13, no. 4: 661. https://doi.org/10.3390/polym13040661

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