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Titel:
Modelling and systematic experimental investigation of mass transfer in supported palladium-based membrane separators
 
Auteur(s):
Boon, J.; Pieterse, J.A.Z.; Dijkstra, J.W.; Sint Annaland, M. van
 
Gepubliceerd door: Publicatie datum:
ECN Biomass & Energy Efficiency 14-11-2012
 
ECN publicatienummer: Publicatie type:
ECN-W--12-048 Artikel wetenschap tijdschrift
 
Aantal pagina's:
23  

Gepubliceerd in: International Journal of Greenhouse Gas Control (Elsevier), , , Vol., p.-.

Samenvatting:
Hydrogen separation with palladium-based membranes is considered as a promising technology for pre-combustion CO2 capture as well as for industrial hydrogen production. With improvements in membrane permeance, resistances to mass transfer are becoming increasingly important. In this work, a systematic approach is followed in order to discern and account for di_erent contributions to the overall mass transfer resistance, based on a combined experimental and modelling approach. Experiments have been performed that started with pure H2 feed, without sweep, subsequently followed by introducing N2 on the feed side, and N2 sweep gas. Using a phenomenological description for the palladium layer and the dusty gas model for the membrane support, coupled to a 2D Navier-Stokes solver with a convection-diffusion equation to account for possible concentration polarisation, all relevant mass transfer resistances are adequately modelled. For the conditions investigated, the main resistances to mass transfer are concentration polarization in the retentate, hydrogen permeation through the metallic palladium layer, and a diffusional resistance in the support layer.


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