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A novel model equation for the permeation of hydrogen in mixture with carbon-monoxide through Pd-Ag membranes (Articolo in rivista)
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- A novel model equation for the permeation of hydrogen in mixture with carbon-monoxide through Pd-Ag membranes (Articolo in rivista) (literal)
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- 2008-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.seppur.2007.10.010 (literal)
- Alternative label
Barbieri G.; Scura F.; Lentini F.; De Luca G.; Drioli E.; (2008)
A novel model equation for the permeation of hydrogen in mixture with carbon-monoxide through Pd-Ag membranes
in Separation and purification technology (Print); Academic Press Elsevier, Inc., New York (Stati Uniti d'America)
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- Barbieri G.; Scura F.; Lentini F.; De Luca G.; Drioli E.; (literal)
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- http://www.sciencedirect.com/science/article/pii/S1383586607004790 (literal)
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- National Research Council, Institute for Membrane Technology (ITM-CNR), Via Pietro BUCCI, c/o The University of Calabria, cubo 17C, 87036 Rende CS, Italy
The University of Calabria, Department of Chemical Engineering and Materials, cubo 44/A, Via Pietro BUCCI, 87030 Rende CS, Italy
The University of Calabria, Via Pietro BUCCI, 87030 Rende CS, Italy (literal)
- Titolo
- A novel model equation for the permeation of hydrogen in mixture with carbon-monoxide through Pd-Ag membranes (literal)
- Abstract
- Hydrogen permeance decrease, owing to the covalent interaction of carbon monoxide with the Pd-Ag membrane surface, represents a considerable drawback, since this decreases the efficiency of the alloy membranes. This work proposes a novel Sieverts-Langmuir's model taking into account the mentioned adsorption. The proposed model equation, in order to take into account the fraction of the membrane surface not active for hydrogen permeation, introduces Langmuir's isotherm, which is the surface loading in the classical Sieverts' permeation equation. The evaluation of the ? parameter and the Langmuir affinity constant involved in the proposed model was carried out using experimental data measured using a 60 ?micron thick Pd-Ag commercial membrane at 647K (374 oC), up to a total pressure of 700 kPa. The presented model yields, in a parametric form, a quantitative assessment of hydrogen permeance decrease caused by the adsorption of gases on Pd-Ag membrane surfaces. Therefore, this novel Sieverts-Langmuir's equation models hydrogen permeation through Pd-Ag-based membranes in the presence of inhibitor gases such as CO.
In addition, by ab initio evaluation of the ? and the Langmuir affinity constant, the proposed Sieverts-Langmuir's equation can identify a new membrane with better efficiency. (literal)
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