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Separation of Hydrogen Using Pd/Ag Membranes: Experimental and Modeling Results with Potential Application to Direct Internal Recycle
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DOI：10.1080/15361055.2025.2571383.png)
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Abstract
En 中文
Implementation of fusion energy requires processing the deuterium-tritium (D-T) mixture used to fuel the reaction, and separation of hydrogen isotopes from other gases is imperative. Specifically, the separation of hydrogen isotopes from helium is a matter of importance to the fusion fuel cycle community. Initial testing with a palladium-silver (Pd-Ag) membrane indicates that even moderate vacuum (similar to 100 torr permeate pressure) can provide a high degree of separation (>90%) at a high ratio of H-2 to He. Given the presence of He in many fusion systems, a high technology readiness level (TRL) for Q(2)/He (where Q represents any isotope of hydrogen) separations is needed. This study demonstrates the efficacy of H-2 removal from He via permeation and potential applications for direct internal recycle. Modeling will accompany the experimental campaign to generate a predictive capability and quantify the separation performance. Modeling from previous hydrogen permeation studies has demonstrated that the typical Sieverts' law fails to predict the measured permeation rates at high hydrogen fluxes. Existing models are being refined to integrate the effects of surface phenomena into permeation predictions, which have been expanded to account for mixtures with large ranges of Q(2) concentrations. These data will improve the TRL of permeators as a separation technology for the fusion fuel cycle.
Keywords:
Fusion fuel cycle
hydrogen isotopes
hydrogen purification
direct internal recycle
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F
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1.2
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103
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2.7K
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