Experimental study of CO2 hydrate formation under an electrostatic field

Comprehensive Review and Perspectives of CO2 Hydrate Storage in Subseafloor Saline Sediments: Formation, Stability, and Optimization Strategies

“…Controlled heating methods are essential in optimizing CO 2 hydrate formation and stability in subseafloor saline sediments. One prominent approach involves using electrical heating systems, 249 as diagrammatically illustrated in Figure 63. By applying controlled electrical currents, researchers can precisely manage the temperature within the sediments, facilitating the controlled formation and dissociation of CO 2 hydrates.…”

“…In this context, the electrostatic field's influence on memory water indicates its ability to disrupt the hydrate formation process. In addition, Zhao et al 249 revealed that in the saltwater system, an electrostatic field influences the entire CO 2 hydrate formation process. After the dissolution stage, the field enhances CO 2 hydrate formation, but the intense collision between ions and nuclei under a strong electrostatic field inhibited hydrate growth.…”

“…The comparative analysis of the discussed studies reveals the diverse effects of electrical fields on CO 2 hydrate formation in different systems. While Meng et al 250 revealed that specific electric field strengths within an intensity window (0.2−0.6 V/ nm) significantly promote CO 2 hydrate growth by altering water molecule alignment and increasing solubility, Zhao et al 249 showcased varying outcomes depending on the solution composition. In freshwater systems, the electrostatic field enhances hydrate formation by facilitating water molecule aggregation, but its impact diminishes in memory water systems, where residual hydrate cage fragments remain after decomposition.…”

“…Formation of CO 2 hydrate under the influence of an electrostatic field. Reproduced with permission from ref . Copyright 2023, Elsevier.…”

“…By applying controlled electrical currents, researchers can precisely manage the temperature within the sediments, facilitating the controlled formation and dissociation of CO 2 hydrates. This method allows for a fine-tuned manipulation of the thermal conditions, enabling scientists to study and optimize the hydrate formation process with high precision. , Additionally, microwave heating is another noteworthy technique employed in this context. Microwave energy can be selectively delivered to specific regions of subseafloor sediments, promoting efficient heating and enhancing the kinetics of CO 2 hydrate formation .…”