http://www.cnr.it/ontology/cnr/individuo/prodotto/ID55075
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
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Caravella A., Barbieri G., Drioli E. (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
- dx.doi.org/10.1016/j.seppur.2009.01.008 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
- 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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