Natural gas hydrate technology offers a potentially safer, more efficient, and convenient method for storing and transporting gases. However, factors such as slow kinetics, environmental contamination, and high cost of use have severely hindered the development of storage applications. Sodium dodecyl sulfate (SDS) is one of the most widely used additives to promote gas hydrate generation, but the large-scale application of SDS can cause serious environmental damage. In order to reduce the dependence on SDS, several scholars have investigated amino acids, an environmentally friendly additive, and have demonstrated that amino acids have better prospects for promoting methane hydrate generation. In this paper, β-CD was selected to be compounded with amino acids, and its purpose was to further enhance the system’s promotion effect on the kinetics of natural gas hydrate formation by adding β-CD. The results show that the addition of β-CD can effectively enhance the hydrate formation kinetics of the four amino acid systems, in which the final gas consumption of the leucine system was enhanced by 34.88% and the T90 of the methionine system was reduced by 19.51%. Then we found that the addition of β-CD can effectively enhance the dendritic properties of some hydrates by recording the generation process of natural gas hydrates in the system, which achieves the effect of enhancing the kinetics of hydrate generation. In addition, there is an obvious difference between the hydrate properties generated by tryptophan and methionine systems at the gas–liquid interface. Finally, we conducted an in-depth study of the synergistic mechanism of the complex system by combining the hydrate morphological observations and kinetic data.
Hao et al. (Tue,) studied this question.
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