Dynamics investigation on methane hydrate formation process with combined promotion methods

Abstract

Abstract Rapid generation of natural gas hydrates is the basis for the application of hydrate storage and transportation. In this work, the kinetic parameters of methane hydrate formation (gas consumption, gas consumption rate constant and reaction space velocity) both in the liquid continuous impinging stream (LIS) system and sodium dodecyl sulfate (SDS) + water and LIS combination system were investigated in a liquid-continuous impinging stream reactor. The gas consumption rate constant was 3.40 × 10−8 mol2 s−1 J−1 without the impinging stream, while it increased with the increase of impinging strength and reached the maximum value of 3.68 × 10−8 mol2 s−1 J−1 when the impinging strength was 0.21. In the SDS + water and LIS combination system, when the SDS concentration was 600 mg/L, the maximum gas consumption rate constant was 3.99 × 10−8 mol2 s−1 J−1 without the impinging stream, while it reached the maximum value of 4.61 × 10−8 mol2 s−1 J−1 when the impinging strength was 0.38. The results showed that the impinging stream can effectively promote the formation rate of methane hydrate, and single mechanical promotion was better than non-promoting mode but combination promotion methods was better than single mechanical promotion.