Enhancing CO2 hydrate formation and long-term stability in subseafloor saline sediments through integrated thermal and pressure management for effective CO2 sequestration

• Published in: Applied energy Vol. 377; p. 124680
• Main Authors: Kasala, Erasto E., Wang, Jinjie, Hussain, Wakeel, Majid, Asia, Nyakilla, Edwin E.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2025
• Subjects: carbon dioxide; carbon sequestration; CO2 hydrate; energy; Pressure management; renewable energy sources; salinity; sediments; Stability enhancement; Subseafloor storage; temperature; Thermal management; Subseafloor storage; CO2 hydrate; Thermal management; Pressure management; Stability enhancement
• ISSN: 0306-2619
• DOI: 10.1016/j.apenergy.2024.124680

This review examines recent advancements in thermal and pressure management strategies for optimizing CO₂ hydrate formation and stability in subseafloor saline sediments, focusing on their application in carbon capture and storage (CCS). The research synthesizes findings from various studies, exploring how temperature and pressure manipulation, coupled with chemical additives, enhance CO₂ hydrate kinetics, stability, and sequestration efficiency. Novel approaches, such as electrical heating systems and pressure cycling, are discussed for their role in promoting hydrate formation. Challenges, including sediment heterogeneity, salinity variations, and environmental impacts, are critically analyzed. The review concludes by identifying research gaps and suggesting innovative methodologies to improve hydrate-based CCS efficiency. This work provides a comprehensive understanding of the current state and future direction of CO₂ hydrate research, contributing to advancing environmentally sustainable energy practices. •Thermal and pressure manipulation strategies aimed at optimizing CO2 hydrate formation and stability were examined•The evaluation was performed based on incorporating both experimental data, simulation, and theoretical deductions studies.•The study revealed novel electrical heating systems and different pressure management techniques.•Thermal and pressure controls, like electrostatic interactions and cycling, impact CO2 hydrate stability efficiency.•The findings offer promising approaches for the controlled formation and stability of CO2 hydrate.