Influence of Direct Current–Voltage Accompanied by Charge Flow on CO2 Hydrate Formation

The capture and storage of carbon dioxide (CO 2 ) are urgent and crucial to achieve the goal of carbon neutrality. Hydrate-based CO 2 capture technology is one of the promising technologies for capturing and storing CO 2 . This work studied the nucleation and growth of CO 2 hydrate provoked by direct current–voltage accompanied by charge flow with the agitation of 450 rpm at an initial pressure of 3.5 MPa and a temperature of 274.15 K. The results show that the physical bubble behavior and electrochemistry mechanisms could influence CO 2 hydrate formation process in the application of voltage. The induction time and semi-completion time of CO 2 hydrate formation were decreased by 51% and 27.8% in the presence of 15 V, respectively. However, more product of electrolysis, Joule heat and ions, could inhibit the CO 2 hydrate formation process in the application of a high voltage (60 V). In addition, a high voltage (60 V) could change the morphology characteristics of CO 2 hydrate from gel-like to whisker-like. This study provides valuable information on the formation of CO 2 hydrate under the action of charge flow.