Gas hydrate generation accelerant and preparation method thereof

Abstract

The invention belongs to the field of gas hydrate production and utilization and in particular relates to an accelerant capable of reinforcing gas hydrate generation and a preparation method thereof. The hydrate generation accelerant is a mixed water solution formed by compounding nano dispersed particles with a surfactant and dissolving the compound in water, wherein nano graphite powder is adopted as the nano dispersed particles; SDBS (sodium dodecylbenzenesulfonate) is adopted as the surfactant; based on the total amount of the mixed water solution, the mass fraction of the nano graphite powder is 0.05-1.5%, the mass fraction of SDBS is 0.02-0.08% and the balance is water. The accelerant has the obvious advantages that the mass and heat transfer processes of the hydrate can be greatly reinforced, the overall time of hydrate generation can be shortened and the synthetic efficiency of the hydrate can be improved by adopting the accelerant to reinforce the hydrate generation process; the graphite nano-particles can flow out along with liquid water and can be reused, thus saving the cost.

Description

technical field

[0001] The invention belongs to the field of gas hydrate production and utilization, in particular to an accelerator capable of enhancing the formation of gas hydrate and a preparation method thereof. Background technique

[0002] Hydrate formation is a process accompanied by material transfer and energy change, and is essentially a process controlled by heat transfer and mass transfer. Therefore, the enhanced hydrate formation process is mainly carried out from the above two aspects. Traditional mechanical strengthening methods such as stirring, spraying, and bubbling are mainly used to enhance the gas-liquid mass transfer process and reduce the resistance to hydrate formation. also. The main purpose of various additives, including thermodynamic accelerators and kinetic accelerators, is also to enhance the heat and mass transfer at the gas-liquid interface. Nanofluid is a cooling medium with high thermal conductivity and heat transfer proposed at the end o...