Chinese Journal of Magnetic Resonance ›› 2005, Vol. 22 ›› Issue (4): 343-348.

• Articles •     Next Articles

In Situ High-pressure NMR Observations of Formation of Methane Hydrate in the Mesochannels of SBA-15

  

  1. State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China
  • Received:2005-09-26 Revised:2005-09-30 Online:2005-12-05 Published:2005-12-05
  • Supported by:

    国家自然科学基金面上项目资助(No. 90210024).

Abstract:

A home-made high pressure apparatus and a static NMR cell capable of standing high pressure up to 10 MPa were employed to study the formation of methane hydrate in SBA-15 with uniform pore size and ordered hexagonal structure. It is found that,under static condition, the introductive period for methane hydrate formation in the mesochannels of SBA-15 is shorter than that for the formation of bulk methane hydrate,suggesting that SBA-15 can promote the formation of methane hydrate. In situ high-pressure 1H and 13C NMR studies show that at certain pressure,even in the presence of excess methane,not all the water molecules confined in the mesochannels of SBA-15 can be completely utilized to form methane hydrate.

Key words: NMR, methane hydrate, methane, mesoporous materials, SBA-15

CLC Number: