In situ high-pressure NMR observations on the formation and dissociation of methane hydrate

被引：0

作者：

Chen, Ai Bing ^{[1
]}

Zhang, Wei Ping ^{[1
]}

Lan, Xi Jie ^{[1
]}

Zheng, Heng ^{[1
]}

Liu, Xiu Mei ^{[1
]}

Han, Xiu Wen ^{[1
]}

Bao, Xin He ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

来源：

CHINESE CHEMICAL LETTERS | 2006年 / 17卷 / 06期

关键词：

in situ NMR; high-pressure NMR; methane; methane hydrate; hydrate formation; hydrate dissociation;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 H-1 and C-13 NMR spectroscopies. Methane hydrate can be formed or decomposed in the temperature range of -5 to -13 degrees C 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 H-1 NMR experiments indicated that the critical size of the hydrate clusters is crucial for the formation of methane hydrate.

引用

页码：791 / 794

页数：4

共 5 条

[1] Computation of the methane-water potential energy hypersurface via ab initio methods [J].