Session: HT-07-01 Design and Analysis of High Pressure Hydrogen Equipment-1

Paper Number: 122991

122991 - Influence of the Repeated Cycles of High-Pressure Hydrogen Exposure on Rubber Materials 

Rubbers serve a important role as sealing materials in hydrogen refueling stations and hydrogen fuel cell vehicles. These materials are damaged due to repeated exposure to high-pressure hydrogen during the hydrogen charging and dispensing processes, and there is a risk of hydrogen leakage. Therefore, for the safe use and distribution of hydrogen energy, it is important to evaluate the damage and the deterioration of rubber materials due to the repeated exposure to high-pressure hydrogen. In order to evaluate the effect of the high-pressure hydrogen exposure in the rubber materials, several research groups have been conducting research by developing high-pressure hydrogen exposure devices and the repetitive pressurization equipments. However, the repetitive pressurization devices developed so far have the disadvantage of requiring not only a compressor to generate high pressure of 70 MPa or more and a high-capacity hydrogen storage vessel, but also a huge test building equipped with safety facilities. In this study, we have developed a hydrogen charging system which is capable of pressurizing a hydrogen to 12 MPa and is heated up to 90 ℃, and evaluated the deterioration of rubber materials due to exposure to hydrogen more easily at the laboratory level. When exposed to 8 MPa of hydrogen at 60 ℃ for 24 hours, cracks was found in the EPDM material without carbon black, but in the case of samples with more than 40 phr of carbon black, no damage found even after several repeated hydrogen exposure.

Presenting Author: Nak-Kwan Chung Korea Research Institute of Standards and Science

Presenting Author Biography: none

Authors:

Nak-Kwan Chung Korea Research Institute of Standards and Science
Ye Won Kim KRISS
Sangkoo Jeon KRISS