Abstract
A novel alternative to high-pressure mechanical hydrogen compression has been proposed. The alternative technology employs a two-stage, hybrid, thermo-electrochemical system based on electrochemical and metal hydride hydrogen compression technologies. A technical analysis was performed to evaluate the performance of both the electrochemical low-pressure stage (100 bar) and the metal hydride high-pressure stage (875 bar). The performance of several membrane and metal hydride candidate materials was evaluated and the best candidate materials were identified. A model of the integrated, two-stage system was developed that found that all or most of the waste heat from the electrochemical stage can be used to fully drive the metal hydride stage, thereby, improving the overall efficiency of the combined process.
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