Predictive Modelling and Economic Analysis for Enhanced Efficiency in Electrochemical Hydrogen Compressors

Hydrogen is a promising energy carrier, but efficient separation and compression are crucial for its transport via natural gas pipelines. This study focuses on electrochemical hydrogen compression as a combined purification and compression solution. A predictive model was developed using experimental data to analyse system performance, simulating key phenomena such as gas permeation, hydrogen back-diffusion and membrane hydration. The model also incorporates the current-potential relationship, considering membrane properties and operational parameters. Using this model, the optimal parameters for maximizing system efficiency were identified. Different Nafion® membranes (N-117, N-115, N-212), natural gas:hydrogen mixtures, and output pressures (350 and 700 bar) were evaluated. A techno-economic analysis based on the data obtained from the model assessed CAPEX, OPEX, and H2 cost, identifying the best configurations to enhance overall performance.