A device and method for testing gas hydrate phase equilibrium conditions under normal pressure conditions

By integrating an integrated atmospheric pressure gas hydrate phase equilibrium testing device and method, the problem of data scarcity in atmospheric pressure gas hydrate phase equilibrium testing was solved, high-precision phase equilibrium measurement was achieved, and key data support was provided.

CN121522087BActive Publication Date: 2026-06-09崂山国家实验室
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
崂山国家实验室
Filing Date
2025-10-31
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies lack the equipment and methods for testing the phase equilibrium of gas hydrates under normal pressure conditions, resulting in a lack of experimental data and making it difficult to achieve high-precision phase equilibrium testing, especially under low-pressure conditions.

Method used

An integrated gas hydrate phase equilibrium testing device under normal pressure was designed. It adopts a high-pressure reactor combined with an ultra-low temperature gas-cooled temperature control system and an independent high and low temperature control subsystem. Through high-precision micro-pressure change monitoring and constant volume stepwise temperature increase decomposition method, the device can achieve rapid synthesis of hydrates and accurate capture of phase equilibrium points.

Benefits of technology

It achieved high-precision measurement of gas hydrate phase equilibrium under normal or near-normal pressure conditions, providing key data support and reliable experimental data for model verification and safety design.

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Abstract

The present application relates to gas hydrate phase equilibrium test technical field, especially to a kind of gas hydrate phase equilibrium condition testing device and method under normal pressure, testing device adopts the core architecture of hydrate synthesis and phase equilibrium test under normal pressure integration in same reaction kettle unit, and for the function difference of synthesis and phase equilibrium test under normal pressure, independently equipped with high-low temperature control subsystem and pressure control module, both guarantee the efficiency of high-pressure synthesis stage, meet the accuracy requirement of low-pressure test stage again.Testing method uses constant volume step-by-step warming decomposition method, combined with high-precision micro-pressure variation monitoring, can accurately capture hydrate phase equilibrium point under low-pressure condition.The present application solves the problem of lack of hydrate phase equilibrium experimental data in the vicinity of normal pressure, and can provide key data support for model verification and safety design.
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Citation Information

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