C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 3/38 (2006.01) B01J 8/00 (2006.01) B01J 8/02 (2006.01) B01J 19/24 (2006.01) C01B 3/26 (2006.01) C01B 3/50 (2006.01)
Patent
CA 2351867
A ferritic stainless steel sheet containing 16-25 mass % of Cr and Ti and/or Nb at a ratio of (C+N) X 8 or more is used as a substrate for formation of a hydrogen-permeating membrane exposed to a high-temperature atmosphere of 600-900°C, while another ferritic stainless steel sheet containing Cr up to 15 mass % is used as a substrate for formation of a hydrogen-permeating membrane exposed to a high-temperature atmosphere of 450-600°C. The stainless steel sheet is formed to a perforated body 3a with holes for passage of gas. A hydrogen-permeating membrane 3b is fixed to on an external surface of the perforated body 3a to build up a hydrogen-separating pipe 3. A plurality of the hydrogen-separators 3 are inserted into a cavity between inner and outer walls of a double-pipe 2 filled with a catalyst 4. Hydrocarbon gas fed through a nozzle 7 is decomposed with combustion heat of a fuel F fed into an inner space of the double-pipe 2. A decomposition product H2 selectively permeates through the membrane 3b and flows out through the takeout opening 8.
Kawatani Kouichi
Oku Manabu
Seki Tsutomu
Utsunomiya Takeshi
Nisshin Steel Co. Ltd.
Ridout & Maybee Llp
Tokyo Gas Co. Ltd.
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