We demonstrate that l‐methionine, a natural amino acid, can be used to dramatically enhance CO2 uptake kinetics in the formation of CO2 hydrate without the use of energy‐intensive mixing technologies or environmentally harmful chemicals. To the best of our knowledge, l‐methionine is the most effective promoter to enhance CO2 hydrate formation (at a concentration of 0.2 wt %, the gravimetric capacity reached up to 356 mg g−1 in 1000 min, and t90 (the time to achieve 90 % of this capacity) was only 15 min). We also present a tentative explanation for the promotion mechanism of l‐methionine in the formation of CO2 hydrate from the point of view of structure–property relationship that will help search for more effective promoters. Our results may offer the possibility of practical application of hydrate‐based CO2 capture and storage technology.

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