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The ideal polymer gas separation membrane material should have high permeability and good permeability selectivity, high mechanical strength, excellent thermal and chemical stability and excellent film-forming processing performance. Among the above requirements, the gas permeability of the gas components separated by the polymer gas separation membrane is an index that manufacturers focus on in the technical development and research.

The gas membrane separation technology is a new and efficient separation technology. Compared with the traditional separation technology, it has the characteristics of less investment, simple equipment, low energy consumption, convenient use, easy operation, safe and pollution-free. Therefore, in recent years, it has been more and more widely used in food, medicine and health, petrochemical, biological technology, environmental engineering and other industries, and has received high attention from all aspects. Polymer gas separation membrane material is one of the key issues in the development of membrane separation technology. The ideal polymer gas separation membrane material should have high permeability and good permeability selectivity, high mechanical strength, excellent thermal and chemical stability and excellent film-forming processing performance. Among the above requirements, the gas permeability of the gas components separated by the polymer gas separation membrane is an index that manufacturers focus on in technical development and research.

Next, combined with the G2/110X membrane separation test analyzer, the gas permeability test of gas components separated by polymer gas separation membrane is briefly introduced.

1、 Separation principle of polymer gas separation membrane

The gas membrane separation technology is to use different gases in the raw gas mixture to have different permeability to the polymer gas separation membrane material itself, and take the pressure difference between the gases on both sides of the polymer gas separation membrane as the driving force to obtain the gas enriched materials with high permeability on the permeation side, and the separated gas that is not easy to permeate on the permeation side, so as to achieve the purpose of gas separation.

2、 Test principle of G2/110X membrane separation test analyzer

Under the specified temperature conditions, the permeability cavity is separated by the polymer gas separation membrane sample. One side is mixed gas with a certain pressure, and the other side is vacuumed. Thus, a certain pressure difference of mixed gas is formed on both sides of the polymer gas separation membrane sample, and the gas will pass through the membrane and enter the low pressure side; Then it is carried into the separation chamber by the carrier gas flow, and the content of each gas in the carrier gas is determined by the FID hydrogen flame ionization detector, and then the amount of each gas passing through the unit area sample in the unit time is calculated.

G2/110X membrane separation test analyzer is the first detection instrument in the world that is applied to the permeability test of gas components separated by polymer gas separation membrane. It adopts embedded computer system platform, with excellent options and stable and reliable performance; Using the principle of differential pressure measurement and chromatographic analysis technology; It can realize the qualitative and quantitative determination of permeability, selectivity and permeability rate of each component of single and mixed test gas; The two-way temperature control of heating and cooling can be used to test the performance of the separation membrane at any temperature within the range, meeting the research needs of scientific research institutions and colleges to analyze and improve the barrier performance of polymer gas separation membrane materials.

Of course, it is necessary to control some other indicators to ensure the quality of the product after the gas permeability index of the polymer gas separation membrane to the components of the separated gas is qualified.

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