1 mm defects in thin-film Pd membrane repaired via glass frit and water mixture.
Frit seal stable over 10 thermal cycles to 520 °C, despite difference in CTE.
Long-term (>150 h) stability observed in H2 within 40 °C of frit softening point.
Presence of steam degrades seals at 520 °C, but stable performance seen at 400 °C.
Stable (>150 h) NH3 decomposition with high conversion (98%) and H2 purity (>99%).