Abstract:
Objective Methane hydrates are considered as a safe and efficient method for natural gas storage. However, slow formation rate and limited storage capacity hinder the industrial application of this technology. Therefore, there is an urgent need to address the rapid formation of methane hydrates and increase the methane storage capacity.
Method The formation of methane hydrates in the system of copper foam (CF) and 5.56 mol% 1,3-dioxolane (1,3-DIOX) at 2.0, 3.0, and 4.0 MPa was studied by spraying method and stirring method.
Result Under the combine of stirring and spraying, the 60 PPI (pores per inch) CF + 1,3-DIOX had the best promotion effect on the formation of methane hydrate, and the induction time was only 12.45 min which being reduced by 66.8% compared with that without CF. Comparing to the pure water, 60 PPI CF single system and the 1,3-DIOX single system, it exhibited the highest gas consumption of 0.173 3 mol/mol increased by 261.04%, 136.75% and 74.00%, respectively.
Conclusion Adding CF and 1,3-DIOX not only can shorten the induction times, but also significantly increase the gas consumption. The results of this study will provide experimental data and technical references for the practical application of the hydrate based solid-storage and transportation of natural gas.
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