Abstract
The hydrogen production capabilities of the membrane reactor combining V-10 mol%Fe hydrogen permeable alloy membrane with Ru/Cs 2 O/Pr 6 O 11 ammonia decomposition catalyst are studied. The ammonia conversion is improved by 1.7 times compared to the Ru/Cs 2 O/Pr 6 O 11 catalyst alone by removing the produced hydrogen through the V-10mol%Fe alloy membrane during the ammonia decomposition. 79% of the hydrogen atoms contained in the ammonia gas are extracted directly as high-purity hydrogen gas. Both the Ru/Cs 2 O/Pr 6 O 11 catalyst and the V-10 mol% Fe alloy membrane are highly durable, and the initial performance of the hydrogen separation rate lasts for more than 3000 h. The produced hydrogen gas conforms to ISO 14687–2:2019 Grade D for fuel cell vehicles because the ammonia and nitrogen concentrations are less than 0.1 ppm and 100 ppm, respectively. • Reactor combing V-alloy membrane and Ru catalyst for H 2 production from NH 3 . • High purity H 2 conforming to ISO standards for FCV is produced directly from NH 3 . • NH 3 conversion of Ru catalyst increases 1.7 times by combining with V-alloy membrane. • 79% of the H contained in the supplied NH 3 is directly extracted as high purity H 2 . • The stable H 2 separation flux lasts for more than 3000 h.
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