Concentration Polarization Analysis in Self-supported Pd-based Membranes (Articolo in rivista)

Type
Label
  • Concentration Polarization Analysis in Self-supported Pd-based Membranes (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.seppur.2009.01.008 (literal)
Alternative label
  • Caravella A., Barbieri G., Drioli E. (2009)
    Concentration Polarization Analysis in Self-supported Pd-based Membranes
    in Separation and purification technology (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Caravella A., Barbieri G., Drioli E. (literal)
Pagina inizio
  • 613 (literal)
Pagina fine
  • 624 (literal)
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  • 66 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • dx.doi.org/10.1016/j.seppur.2009.01.008 (literal)
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  • 12 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • The University of Calabria - Department of Chemical and Materials Engineering, Via Pietro BUCCI, Cubo 44A, 87036, Rende, CS, Italy National Research Council - Institute on Membrane Technology (ITM-CNR), Via Pietro BUCCI, c/o The University of Calabria, Cubo 17C, 87036, Rende, CS, Italy (literal)
Titolo
  • Concentration Polarization Analysis in Self-supported Pd-based Membranes (literal)
Abstract
  • In thiswork, the concentration polarization phenomenon in hydrogen permeation through self-supported Pd-alloy membranes is evaluated by an opportune coefficient expressed as a function of the ratio of the flux calculated by means of a validated complex model considering all the elementary steps involved in the permeation [A. Caravella, G. Barbieri, E. Drioli, Modelling and Simulation of Hydrogen Permeation through Supported Pd-based membranes with a multicomponent approach, Chemical Engineering Science 63 (8) (2008) 2149-2160] and the one obtained by the Sieverts' law utilizing the bulk driving force and hydrogen permeance. The polarization coefficient was evaluated as a function of several operating conditions: upstreamhydrogen molar fraction ([0, . . ., 1]), totalpressure of upstream([200, . . ., 1000] kPa), total pressure of down-stream ([100, . . ., 800] kPa), temperature ([300, . . ., 500] oC), membrane thickness ([1, . . ., 150]?m), permeance ([0.1, . . ., 20]mmolm-2 s-1 Pa-0.5) and upstream fluid-dynamic conditions (Reynolds' number). The analysis shows that the polarization effect can be relevant not only when using very thin membranes (1-5?m ca.), but also when thicker ones (100?m ca.) are operated in specific conditions. A validation of the analysis is provided by means of some experimental data from literature, finding a good agreement with them. The overall result of the paper is the development of so-called \"polarization maps\", on which the influence of concentration polarization can be evaluated quantitatively in different conditions, providing a useful tool to reduce the uncertainties in the hydrogen purification equipment design. (literal)
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