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Gas Separation Membrane Testing with Pressure Differential Method

Gas Separation Membrane Testing with Pressure Differential Method

Gas Separation Membrane Testing with Pressure Differential Method

Product catalog summary
Introduction
The document discusses the testing of gas separation membranes using the pressure differential method, focusing on the separation coefficient as a key indicator of membrane selectivity for gas separation. The study measures the permeability of nitrogen (N2) and carbon dioxide (CO2) through a membrane sample.

Methodology
The pressure differential method is based on ASTM D1434, utilizing the C106H Gas Permeability Test System by Labthink. The procedure involves preparing three circular specimens, applying vacuum grease, placing filter papers, and clamping the samples in test chambers. The system is purged with nitrogen, and test parameters are set via software. After testing with nitrogen, the system switches to carbon dioxide for repeated testing.

Results
The nitrogen permeability coefficient is measured at 6.3289 × 10^-11 cm3·cm·cm-2·s-1·cmHg-1, while the carbon dioxide permeability coefficient is 1.6455 × 10^-9 cm3·cm·cm-2·s-1·cmHg-1. The CO2/N2 separation coefficient is calculated to be 26.0.

Conclusion
The pressure differential method effectively measures gas permeability coefficients and calculates separation coefficients. The high CO2/N2 separation coefficient of 26.0 indicates good separation performance for the tested membrane.

Additional Information
Labthink offers various testers for oxygen and water vapor transmission rates and encourages collaboration with packaging industry companies for quality control. More information is available on their website, www.labthink.com.
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Catalog excerpts

Gas Separation Membrane Testing with Pressure Differential Method-1

Labthink Instruments Co., Ltd. [email protected] +86-531-85068566 Gas Separation Membrane Testing with Pressure Differential Method Separation coefficient is a crucial indicator of membrane selectivity for separating gases. Higher separation coefficient signifies better separation ability. The experiment measures nitrogen (N2) and carbon dioxide (CO2) permeability of a membrane sample. This study adopts pressure differential method based on ASTM D1434.The testing instrument used is C106H Gas Permeability Test System by Labthink. Prepare the samples, cut three circular specimens (diameter 97mm), apply vacuum grease and place the filter papers, clamp the samples are in the test chambers. The system is then purged with nitrogen, and test parameters are

 Open the catalog to page 1
Gas Separation Membrane Testing with Pressure Differential Method-2

Labthink Instruments Co., Ltd. [email protected] +86-531-85068566 set on the software. After nitrogen testing, the system is switched to carbon dioxide and the test is repeated. The result showed that the nitrogen permeability coefficient is 6.3289 × 10^11 cm3· cm-2· cm· s-1•cmHg-1. Carbon dioxide permeability coefficient is 1.6455 × 10^-9 cm3· cm-2· cm· s-1•cmHg-1. CO2/N2 separation coefficient: 26.0 In conclusion, the pressure differential method allows measurement of gas permeability coefficients and calculation of separation coefficients. The higher CO2/N2 separation coefficient (26.0) in...

 Open the catalog to page 2

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