A dynamic measurement method and system based on parallel differential pressure analysis

By employing a parallel differential pressure analysis method, the static and accuracy issues of gas solubility measurement in existing technologies have been resolved. This method enables dynamic measurement of gases in liquids and the acquisition of high-precision dissolution parameters, making it applicable to various engineering systems.

CN122329910APending Publication Date: 2026-07-03SHENYANG UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-01
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing technologies for measuring the solubility of gases in liquids are limited to static equilibrium, which cannot capture rapid dissolution behavior over short timescales, makes it difficult to distinguish the effects of gas dissolution and system leakage, and has low measurement accuracy.

Method used

The parallel differential pressure analysis method is adopted. Gas is simultaneously introduced into the measuring unit and the control unit and the pressure decay is monitored. The net pressure decay curve is calculated differentially. The gas mass change is inverted by combining the ideal gas law. Dynamic measurement is achieved using a high-frequency pressure sensor and a millisecond-level control valve.

Benefits of technology

It enables dynamic measurement of the gas dissolution process, improves time resolution, captures rapid dissolution events within a short timescale, eliminates system leakage interference, improves measurement accuracy, simplifies the measurement process, and provides complete dissolution kinetic parameters.

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Abstract

The application provides a dynamic measurement method and system based on parallel differential pressure analysis, and relates to the technical field of gas-liquid mass transfer measurement. The method adopts a measurement unit and a control unit in parallel, a first closed container of the measurement unit containing liquid and gas, and the initial volume of the gas phase in a second closed container of the control unit being the same as the volume of the gas in the first closed container. After the pressure of the two containers is synchronously and suddenly increased to the initial pressure P0 by synchronous pressure excitation, the system is closed, and the pressure decay curves P1(t) and P2(t) in the two containers are synchronously collected. After differential processing, the influence of system leakage is eliminated, and the net pressure decay curve ΔP(t) is obtained. Based on the ideal gas state equation, the change amount of the dissolved gas mass with time is inversed, and the dissolution kinetics data are obtained. The application can dynamically and accurately measure the gas dissolution process, effectively eliminates the leakage interference, and provides key dissolution kinetics data for gas-liquid mass transfer engineering.
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