ISSN: 0256-1115 (print version) ISSN: 1975-7220 (electronic version)
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Conflict of Interest
In relation to this article, we declare that there is no conflict of interest.
Publication history
Received August 12, 2022
Revised September 18, 2022
Accepted September 25, 2022
Acknowledgements
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1F1A1047108). This work was supported by the ERC Center funded by the National Research Foundation of Korea (NRF-2022R1A5A1033719). The authors also acknowledge the financial support from Korea Gas Corporation(KOGAS) under Award No. 2021-02 (202122671542)
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Optimization of water-saturated superabsorbent polymers for hydrate-based gas storage

1Department of Chemical Engineering, Soongsil University, 369 Sangdo-ro, Dongjak-gu, Seoul 06978, Korea 2Hydrogen Research Center, KOGAS Research Institute, 960 Incheonsinhangdaero, Yeonsu-gu, Incheon 21993, Korea
yhahn@ssu.ac.kr
Korean Journal of Chemical Engineering, May 2023, 40(5), 1063-1070(8), 10.1007/s11814-022-1301-2
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Abstract

Gas hydrates are an environmentally benign and cost-effective gas storage media that can store gas molecules in a lattice formed by hydrogen bonds between water molecules. To utilize gas hydrates on an industrial scale, the formation rate of gas hydrates must be improved. In this study, superabsorbent polymer (SAP) having a three-dimensional porous polymeric network was used to promote the formation of natural gas hydrates. SAP can absorb water efficiently and improve the kinetics of natural gas hydrates without mechanical agitation by expanding the gas-water interfacial area. The promotion effect of SAP is affected by various factors: the formation rate of natural gas hydrate and its reproducibility are determined by how water is dispersed over the SAP powders. Moreover, as the SAP is less crosslinked, the natural gas hydrate formation occurs more rapidly. The amount of saturated water is also a critical factor in determining the formation rate and yield of natural gas hydrates. Through this study, we provide engineering data to design hydrate-based gas storage media in a quiescent system for a large-scale application.

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