注入压差/压力对液态CO2水合物封存影响实验研究OA

To investigate the influencing factors and laws of injection pressure liquefaction conditions on the formation process of CO2 hydrates in marine environments,a formation environment temperature of 1℃and an effective water content(mass fraction)of 99.0%were selected to study the storage characteristics under different injection pressures(0.02,0.05 MPa)and injection pressures(4.0,4.5,5.0 MPa).The pressure and temperature changes were analyzed during the synthesis of CO2 hydrates in the experiment,as well as the final water conversion rate,CO2 gas consumption and saturation of each component.The results show that the smaller the injection pressure difference,the faster the sealing speed in the early stage of the experiment.The initial sealing pressure affects the temperature distribution inside the reaction vessel,and a pressure that is too low or too high can greatly affect the sealing effect.The feasibility and implementation strategy are explored of using hydrate method to sequester liquid CO2 in the sea.