Development of Gas Sensors for Measuring Gas Emission and Diffusion Coefficient in Gas Charged EPDM Polymer Using Volumetric and Manometric Analysis

IntroductionGas sensors are crucial devices in various fields such as industrial safety, environmental monitoring, gas infrastructure and medical diagnosis.They are essential for ensuring safety, particularly under environments where hazardous gases like hydrogen or carbon monoxide are released. [1][2]][4][5][6][7][8][9][10] Early detection of gas emissions and leaks can prevent accidents, fires and other risks.It is also essential for environmental monitoring, as it helps detect pollutants and maintain air quality.Accurate gas sensing plays an important role in optimizing operations, particularly for renewable energy source like hydrogen.By ensuring precise monitoring of hydrogen gas concentrations, it enhances safety, efficiency and performance throughout the hydrogen production, storage and distribution processes. [11][12]13][14][15][16][17][18][19][20][21][22] In hydrogen refueling station charged to high-pressure H 2 , polymer materials play an important role. For itance, polymer-based materials such as O-ring seals, gasket, liner material and non-metallic pipeline are widely used.It was designed to withstand hydrogen environments.However, these polymers are subjected to harsh conditions including wide temperature fluctuations (-70 C to 90 C) and pressure variations (1 MPa to 90 MPa).These conditions can lead to seal damage, insufficient contact with glove and gas permeation through polymer seals, all of which can result in hydrogen leakage. [46][47]48][49][50][51][52] Gas permeation, including hydrogen permeation, in polymer materials also occurs when gases pass through the polymer matrix due to diffusion.This process is influenced by various