1900

Evaluation of hydrogen permeation characteristics in rubbery polymers

Abstract

To find suitable sealing material with low permeability against hydrogen, the elaborated evaluation techniques for hydrogen transport properties are necessary. We developed two techniques determining the permeability of hydrogen including software for diffusion behavior analysis. The techniques contain gas chromatography and volumetric collection of hydrogen gas. By measuring the hydrogen released from polymer samples with respect to the elapsed time after being decompressed from the high pressure, total amount of adsorption and diffusivity (D) of hydrogen are evaluated with self-developed program of Fick's diffusion equation specified to a sample shape. The solubility (S) and permeability (P) of the polymers are determined through Henry's law and a relation of, P=SD respectively. Developed techniques were applied to three kinds of spherical-shaped sealing rubbers, NBR, EPDM, and FKM. The D, S and P have been measured as function of pressure. The permeability obtained by both methods are discussed with Comsol simulation.

Funding source: Development of Reliability Measurement Technology for Hydrogen Fueling Station funded by Korea Research Institute of Standards and Science(KRISS- - 2020 - GP2020-0007); 2019–2021 KAIA/MOLIT Project (No.19TLRP-C152334-01) leaded by Korea Research Institute of Standards and Science (KRISS).
Countries: Korea, Republic of
Loading

Article metrics loading...

/content/journal2030
2020-10-21
2021-06-24
http://instance.metastore.ingenta.com/content/journal2030
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error