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Electrolysis • Electrochemically dissociate water into gaseous hydrogen and oxygen • ECLSS o Unbalanced Design ( H2 << O2 ) o Unmet long-term requirements for reliability, life, or H2 sensors stability • Energy Storage o Balance Design ( H2 ≈ O2 ) o Unmet long-term requirements for performance, reliability, life, sensors availability, sensor stability • ISRU o Balance Design ( H2 ≈ O2 ) o Unmet long-term requirements for performance, reliability, or life o Tolerate contaminated water sources to minimize pre-conditioning requirements Water Mining and Processing • Recover raw materials from local sources o Regolith Processing • Contaminated Water Processing • Minimize water cleaning system complexity and mass • Remove inert contaminants (e.g. Ca+ and Mg+ salts) • Remove chemically active contaminants Notional Electrolysis Requirements Hydrogen Generation 45 40 35 30 25 20 15 10 5 0 ECLSS Energy ISRU Storage 300 250 200 150 100 50 0 (e.g. H2S, NH3, H2CO3, H2SO4, Hg, Methanol, etc.) 9 Exact Requirements Mission Dependent Operational Pressures, MPa H2 Production Rates, mol/hrPDF Image | NASA Applications using Fuel Cell Electrolysis Technologies
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