Hydrogen purification devices, components and fuel...

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B01D 53/22 (2006.01) C01B 3/50 (2006.01)

Patent

CA 2455434

Hydrogen purification devices, components thereof, and fuel processor and fuel cell systems containing the same. The hydrogen purification devices utilize one or more hydrogen-selective membranes to purify a mixed gas stream containing hydrogen gas and other gases. The devices may include components having coefficients of thermal expansion and/or other properties that more closely resemble the properties of the membranes than conventional components. The components may include at least one of the enclosure, a membrane support, a structure that contacts the membrane and a mounting frame for the membrane. The enclosure may include end plates configured to resist leakage and/or otherwise remain structurally sound at elevated temperatures and pressures, including thermal cycling. The enclosure may include a perimeter shell extending between the end plates, and the shell may include a portion integrally formed with at least one of the end plates, thereby reducing the number of seals in the enclosure.

L'invention concerne un dispositif de purification d'hydrogène (10) comprenant une enceinte (12) renfermant un ensemble de séparation à membrane (20) conçu pour recevoir un flux de gaz mixte (24) contenant de l'hydrogène en vue de produire un flux (34) contenant de l'hydrogène pur ou au moins sensiblement pur. Ledit ensemble de séparation (20) comprend au moins une membrane (46) perméable à l'hydrogène et/ou sélective pour l'hydrogène, et, dans certains modes de réalisation, au moins une enveloppe de membrane comportant une paire de zones de membrane généralement opposées définissant un conduit de prélèvement intermédiaire, ces zones étant séparées par un support. L'enceinte (12) comprend des composants formés à partir de matériaux présentant des coefficients de dilatation thermique similaires ou identiques à ceux de la ou des membrane(s) (46). Dans certains modes de réalisation, ces composants comprennent au moins une partie du support, et, dans d'autres modes de réalisation, au moins une partie de l'enceinte (12).

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