Citation: Ai Bing CHEN, Wei Ping ZHANG, Xi Jie LAN, Heng ZHENG, Xiu Mei LIU, Xiu Wen HAN, Xin He BAO. In situ High-pressure NMR Observations on the Formation and Dissociation of Methane Hydrate[J]. Chinese Chemical Letters, ;2006, 17(6): 791-794. shu

In situ High-pressure NMR Observations on the Formation and Dissociation of Methane Hydrate

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023

Received Date: 28 November 2005

Fund Project: We gratefully acknowledge the National Natural Science Foundation of China for the financial support (No.90210024).

A home-made static NMR cell with pressure up to 10 MPa was employed to observe the formation and dissociation processes of methane hydrate by in situ ¹H and ¹³C NMR spectroscopies. Methane hydrate can be formed or decomposed in the temperature range of -5 to -13℃ at pressures between 4.0 and 7.0 MPa. The higher methane pressure, the formation or dissociation temperature of methane hydrate was higher. In situ ¹H NMR experiments indicated that the critical size of the hydrate clusters is crucial for the formation of methane hydrate.
- In situ NMR,
- high-pressure NMR,
- methane,
- methane hydrate,
- hydrate formation,
- hydrate dissociation
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