Objective To investigate the kinetic performance of a sodium ligninsulfonate-graphene oxide (SL-GO) system for natural gas storage under conditions of 277.15 K and 5 MPa.

Method The study examines the surface tension, gas consumption, and reaction rate of the SL-GO system, comparing its performance in methane hydrate formation with that of a sodium dodecyl sulfate-graphene oxide (SDS-GO) system. Key kinetic indicators such as induction time, gas storage capacity, and t₅₀ were analyzed for both systems.

Result Under identical conditions, the SL-GO system significantly reduced the solution's surface tension. Although the gas storage capacity was comparable to that of the SDS-GO system, the SL-GO system exhibited an 83.77% reduction in induction time, a 60.95% decrease in the total hydrate reaction time, and a 30.18% reduction in the time needed to reach a methane consumption of 50 mmol. Additionally, we investigated the complete dissociation time of hydrates at room temperature. Due to the foamless dissociation of the SL-GO system, its dissociation time was 61% less than that of the SDS-GO system.

Conclusion These kinetic properties demonstrate that the SL-GO system is a more effective and valuable kinetic promoter than the SDS-GO system. This study provides theoretical guidance for natural gas hydrate storage and transportation technologies.