A review of the hydrate based gas separation (HBGS) process for carbon dioxide pre-combustion capture

•A review on a novel process to capture CO2 using water via clathrates is presented.•Hydrate based gas separation process (HBGS) for pre-combustion capture has much promise.•Current state-of-the-art on HBGS process and future directions are presented.•HBGS process is the most environmentally benign approach as water is used as a solvent.

In this work, a systematic review of the literature work done so far on the use of hydrate crystallization as a basis to develop data for the hydrate based gas separation (HBGS) process for the capture of CO2 from fuel gas mixtures is presented. Such a gas mixture may arise in integrated gasification combined cycle (IGCC) power plants. A thorough assessment of the thermodynamic, kinetic factors and economic aspects of the HBGS process and critical comments are presented. Compared with competing technologies, high CO2 capacity and the use of water as a solvent are key advantages for the HBGS process for CO2 capture. Furthermore, in this review, a snapshot of the current state-of-the-art is presented and further research and development opportunities and pathways for commercializing the HBGS process for pre-combustion capture of CO2 from IGCC power plants are discussed.

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