Abstract
In this study, we developed a thermochemical technique to compress hydrogen gas up to more than 80 MPa. The results showed that Ti1.1CrMn alloys can generate a hydrogen pressure of 82 MPa upon being heated to ∼200°C. In order to evaluate the hydrogen absorption and desorption properties of the Ti1.1CrMn alloy at elevated temperatures, its pressure-composition (PC) isotherms were measured at 100, 140, and 180°C. To examine the durability of the alloy, hydrogen compression cycle tests were performed at pressures ranging from 14 to 80 MPa by heating the alloy from 35 to 200°C. In order to determine the temperature required for achieving the dissociation pressure of 82 MPa, we generated an isobar plot based on the PC isothermal measurements.
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