In Situ Observation of Methane Hydrate Dissociation under Different Backpressures
作者： Shenglong Wang , Mingjun Yang , Pengfei Wang , Yuechao Zhao , Yongchen Song
DOI: 10.1021/ACS.ENERGYFUELS.5B00486
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摘要: Depressurization has been considered an economic and practicable method for natural gas hydrate (NGH) exploitation. To obtain the kinetic data of methane (MH) dissociation under different backpressures, MH by depressurization in a porous medium was investigated situ using magnetic resonance imaging (MRI). dissociated backpressures that were varied from 2.8 to 2.2 MPa, saturation variation during analyzed. One experimental case carried out with constant backpressure, four cases variable backpressure experiments out. The radial pattern confirmed. During dissociation, free water observed move toward outlet vessel decreased after totally field view (FOV). MRI provided excellent information on spatial distribution media dissoci...
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