One-step formation of hydrogen clusters in clathrate hydrates stabilized via natural gas blending

被引:51
|
作者
Ahn, Yun-Ho [1 ]
Moon, Seokyoon [2 ]
Koh, Dong-Yeun [1 ]
Hong, Sujin [2 ]
Lee, Huen [1 ]
Lee, Jae W. [1 ]
Park, Youngjune [2 ]
机构
[1] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, BK21 Program, 291 Daehak Ro, Daejeon 34141, South Korea
[2] GIST, Sch Earth Sci & Environm Engn, 123 Cheomdangwagi Ro, Gwangju 61005, South Korea
基金
新加坡国家研究基金会;
关键词
Clathrate hydrates; Inclusion compounds; Gas storage; Gas-phase promoter; Hydrogen-natural gas blends; CARBON-DIOXIDE; MOLECULAR-DYNAMICS; STORAGE; ETHANE; EQUILIBRIUM; OCCUPANCY; RELEASE;
D O I
10.1016/j.ensm.2019.06.007
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Harvesting energy gases in the nanoporous water-frameworks of clathrate hydrate enables the widespread of hydrogen-based fuels converted from excess solar or wind energy sources (i.e., Power-to-Gas). However, there has always been a critical trade-off between mild formation condition and maximum working capacity. Here we demonstrate the 'natural gas modulator' based synthesis that leads to significantly reduced synthesis pressure (P-H2 approximate to 3 MPa) simultaneously with the formation of hydrogen clusters (up to 3 molecules) in the confined nanoporous cages of clathrate hydrates. Instead of employing hazardous liquid chemicals, clean energy gas of natural gas is used for the first time to multiply load H-2 in all cages (5(12), 5(12)6(2), and 5(12)6(4) cages) of hydrogen-natural gas hydrates without any postsynthetic modification (e.g., guest-exchange reaction). This approach minimizes the environmental impact and reduces operation cost since clathrate hydrates do not generate any chemical waste in both synthesis and decomposition process, and hydrogen-natural gas mixture can be also utilized as an energy resource as itself.
引用
收藏
页码:655 / 661
页数:7
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