Effect of Reaction Temperature and Water Saturation on Carbon Dioxide Hydrate Formation Kinetics in Porous Sands
The carbon dioxide sequestration method using gas hydrate is a promising new technology for clean and efficient carbon capture,utilization,and storage in industrial applications.To investigate the kinetic reaction process of carbon dioxide hydrate in porous media,three groups of carbon dioxide hydrate phase equilibrium experiments in the porous sand system were conducted to determine the inlet pressure conditions,and 16 groups of working conditions were also set up to carry out the kinetic experiments of carbon dioxide hydrate formation to analyze the effects of 20%-50%initial water saturation and 1-7 ℃ reaction temperature on the reaction process of hydrate in natural sands.The key factors influencing porous media systems'final gas consumption and gas consumption rate were analyzed.The results show that the final gas storage capacity of the porous media system depends on the initial water saturation and reaction temperature,and is approximately linear with the initial water saturation.The carbon dioxide hydrate generation reaction has a higher gas consumption rate in the initial stage of the carbon dioxide hydrate formation reaction in the natural sand system with high initial water saturation and low reaction temperature.
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