Spectroscopic Identification on Cage Occupancies of Binary Gas Hydrates in the Presence of Ethanol

被引：18

作者：

Lee, Jong-Won ^{[2
]}

Kang, Seong-Pil ^{[1
]}

机构：

[1] Korea Inst Energy Res, Clean Fossil Energy Res Ctr, Taejon 305343, South Korea

[2] Kongju Natl Univ, Dept Environm Engn, Cheonan 331717, Chungnam, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2012年 / 116卷 / 01期

关键词：

CRITICAL GUEST CONCENTRATION; CLATHRATE HYDRATE; PHASE-EQUILIBRIA; SYSTEM; PRESSURE;

D O I：

10.1021/jp210223r

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：

Ethanol has been widely used for inhibiting gas hydrate formation due to its cost and efficiency. However, recent research showed that ethanol can act as a hydrate former when coguested with CH(4) molecules at various ethanol concentrations. Herein, we report tuning phenomenon of the gas hydrate in the presence of ethanol by means of spectroscopic measurements. On the basis of the experimental results, it is verified that ethanol molecules cannot inhibit hydrate formation effectively, but enhance the gas storage in the hydrate phase when a much less amount of the inhibitor than the stoichiometric concentration is used. The cage occupancies of binary hydrate systems in the presence of a thermodynamic inhibitor, showing similar guest behaviors in the presence of a promoter such as tetrahydrofuran (THF), can provide useful information on the molecular behaviors of guest species.

引用

页码：332 / 335

页数：4

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