TY - JOUR
T1 - Hydrogen-bonded clathrate hydrate as tunable media for efficient methane storage
AU - Lee, Yunseok
AU - Moon, Seokyoon
AU - Seo, Dongju
AU - Lee, Seungin
AU - Park, Youngjune
N1 - Publisher Copyright:
© 2022 Elsevier Ltd.
PY - 2022/10
Y1 - 2022/10
N2 - The tuning effect of gas hydrates, which creates additional nanospaces to accommodate gaseous guest while maintaining favorable formation conditions, is recognized as a promising strategy for energy gas (CH4 or H2) storage. Although the tuning behavior has been demonstrated on sI and sII gas hydrates, it has not been studied in sH hydrates which have the largest potential gas storage capacity. Here, we report the sH tuning behavior in 1-Methylpiperidine + CH4 hydrate systems under mild formation conditions (e.g., 263.15 K, and 8.0 MPa). The occurrence of sH tuning behavior is experimentally verified via 13C solid-state NMR with DFT calculations. The tuning patterns are observed below the eutectic composition of water + 1-Methylpiperidine, which strongly suggests that the supercooled aqueous phase existing on the surface of ice particles plays a significant role in the tuning phenomena. We expect these finding can open new strategies for enhancing capacity for gas storage, and provide critical insights into the fundamental nature of clathrate chemistry.
AB - The tuning effect of gas hydrates, which creates additional nanospaces to accommodate gaseous guest while maintaining favorable formation conditions, is recognized as a promising strategy for energy gas (CH4 or H2) storage. Although the tuning behavior has been demonstrated on sI and sII gas hydrates, it has not been studied in sH hydrates which have the largest potential gas storage capacity. Here, we report the sH tuning behavior in 1-Methylpiperidine + CH4 hydrate systems under mild formation conditions (e.g., 263.15 K, and 8.0 MPa). The occurrence of sH tuning behavior is experimentally verified via 13C solid-state NMR with DFT calculations. The tuning patterns are observed below the eutectic composition of water + 1-Methylpiperidine, which strongly suggests that the supercooled aqueous phase existing on the surface of ice particles plays a significant role in the tuning phenomena. We expect these finding can open new strategies for enhancing capacity for gas storage, and provide critical insights into the fundamental nature of clathrate chemistry.
KW - Gas hydrate
KW - Host-guest interaction
KW - Natural gas storage
KW - Tuning effect
UR - http://www.scopus.com/inward/record.url?scp=85137093813&partnerID=8YFLogxK
U2 - 10.1016/j.jece.2022.108473
DO - 10.1016/j.jece.2022.108473
M3 - Article
AN - SCOPUS:85137093813
SN - 2213-3437
VL - 10
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 5
M1 - 108473
ER -