Hydrate formation and decomposition visualization reaction system and memory effect evaluation method

Abstract

The present invention proposes a visual reaction system for hydrate formation and decomposition and a memory effect evaluation method. The visual reaction system includes a supply module, a main body model, a back pressure control module, a temperature control module, a camera monitoring module, and a data acquisition and control module. The above-mentioned main model adopts a special structural design, through the constant pressure mode of the fully visible reactor with variable volume, under the condition of not changing the gas-liquid composition in the reactor, the influence of temperature change on the pressure in the reactor is balanced by volume change, And the volume of the fully visible cavity can be precisely controlled through the lead screw; during the experiment, the hydrate nucleation time in the fully visible reactor is monitored through the camera, the nucleation time recorded by the video, and the temperature change in the thermostat The final nucleation temperature of the hydrate is found on the curve, and the memory effect evaluation research is carried out by drawing the probability distribution curve of the hydrate nucleation probability with the nucleation undercooling degree and other related curves by counting the results of a large number of repeated experiments.

Description

technical field [0001] The invention belongs to the field of natural gas hydrate exploitation, and in particular relates to a hydrate generation and decomposition visualization reaction system and a memory effect evaluation method capable of quantitatively evaluating the influence of different potential influencing factors on the memory effect of hydrate secondary synthesis, and capable of linearly controlling temperature and pressure. . Background technique [0002] The phenomenon that the induction time of hydrate is significantly reduced during the secondary formation is called the memory effect. Its genetic mechanism and accurate prediction of the induction time of secondary nucleation are key scientific issues in the fields of flow assurance, deep-sea carbon sequestration, and hydrate resource development. [0003] At present, the research on the formation and decomposition of hydrates mainly focuses on three aspects: firstly, preventing hydrates from clogging pipelines...

AI Technical Summary

Problems solved by technology

However, due to the small driving force for hydrate nucleation under low supercooling conditions, the required induction time is extremely long, and it is not feasible to conduct a large number of induction experiments under the general low nucleation driving force

Images