Modelling of metal hydride hydrogen compressors from thermodynamics of hydrogen – Metal interactions viewpoint: Part I. Assessment of the performance of metal hydride materials

This work presents a model to determine productivity and heat consumption of hydrogen compression utilising metal hydrides (MH) by using Pressure – Composition – Temperature (PCT) diagrams of the MH materials at defined operating conditions – temperatures and hydrogen pressures. The present Part I is focused on the analysis of hydrogen compression performances of several AB₅- and AB₂-type intermetallic alloys which, when operating between temperatures of 20 and 150 °C, provide H₂ compression up to 500 atm, with a cycle productivity about 100 NL H₂/kg MH and compression ratio of up to 10, at H₂ suction pressure below 10–15 atm, or up to 5 at higher suction pressures.