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Direct high-purity hydrogen production from ammonia by using a membrane reactor combining V-10mol%Fe hydrogen permeable alloy membrane with Ru/Cs2O/Pr6O11 ammonia decomposition catalyst |
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| Affiliation: | 1. Department of Materials Science and Engineering, National Institute of Technology, Suzuka College, Shiroko-cho, Suzuka, Mie, 510-0294, Japan;2. Department of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan;3. Elements Strategy Initiative for Catalysts and Batteries (ESCIB), Kyoto University, Katsura, Kyoto, 615-8520, Japan;4. Department of Materials Design Innovation Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan;5. Department of Mechanical Engineering, National Institute of Technology, Oita College, Maki, Oita, 870-0152, Japan |
| Abstract: | The hydrogen production capabilities of the membrane reactor combining V-10 mol%Fe hydrogen permeable alloy membrane with Ru/Cs2O/Pr6O11 ammonia decomposition catalyst are studied. The ammonia conversion is improved by 1.7 times compared to the Ru/Cs2O/Pr6O11 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/Cs2O/Pr6O11 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. |
| Keywords: | Membrane reactor Hydrogen carrier Ammonia decomposition Hydrogen permeable metal membrane |
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