Review on Cooperative Effect of Compound Additives on CO 2 Hydrate Formation: Recent Advances and Future Directions

Hydrate-based CO 2 sequestration is a novel technology to reduce CO 2 emissions and mitigate global warming. The reduction of the induction time and increase of the formation rate and gas storage capacity are the key points for industrially storing CO 2 hydrate. In this review, the research progress of various compound additives for promoting the formation of CO 2 hydrate is reviewed. The promotion mechanisms of different additives and effects of different compound additives on the formation characteristics of CO 2 hydrate are analyzed and summarized. Additionally, the promotion effects of different compound additives are compared and evaluated, challenges and constraints of the current compound additives discussed, and development trends and directions proposed.