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    Development of Pd-based double-skinned membranes for hydrogen production in fluidized bed membrane reactors

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    Development.pdf (1.903Mb)
    Identifiers
    URI: http://hdl.handle.net/11556/531
    ISSN: 0376-7388
    DOI: 10.1016/j.memsci.2017.10.064
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    Author/s
    Arratibel, Alba; Pacheco Tanaka, Alfredo; Laso, Iker; van Sint Annaland, Martin; Gallucci, Fausto
    Date
    2018-03-15
    Keywords
    Pd-based membranes
    Double-skin
    Long term tests
    Hydrogen separation
    Fluidized beds
    Abstract
    This paper reports the preparation and performance characterization of new PdAg supported membranes with a porous protecting layer to protect the membrane surface from particles in a fluidized bed membrane reactor. Supported membranes with a selective layer of 1 µm and a protective layer have been prepared. Outstanding H2 permeance (5·10−6 mol m−2 s−1 Pa−1) and H2/N2 perm-selectivity (over 25,000) were measured at 400 °C and 1 bar of pressure difference. One membrane has been tested for more than 750 h in the presence of fluidized glass beads showing a decay in the perm-selectivity to approximately 5000, mainly due to sealing leakage. However, the protective layer was removed during this long-term test. Another membrane has been tested for more than 2000 h in a fluidized bed membrane reactor with a Rh reforming catalyst supported on promoted alumina in the bubbling fluidization regime. During tests with binary mixtures mass transfer limitations toward the membrane were observed due to ...
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