External mass transfer resistance in H2 permeation through supported Pd-based membranes with N2 sweep gas

The aim of this work is to quantify the mass transfer resistance due to support for H2 Permeation through supported Pd-based Membranes [1]. Such a quantification is needed for a better characterisation of metal membranes for an improved design of separation/purification membrane modules. For this purpose, experimental analysis under N2 sweep conditions on the permeate side (support side). To measure the mass transfer resistance in the support, in analogy to the definition of the Concentration Polarization Coefficient (CPC) for H2 permeation from feed side mixtures (Pd-layer side) to permeate side (support side, pure H2) [2-4], we define a coefficient to quantify mass transfer resistance in the support (provided by ECN [5]) when H2 permeates from a pure-H2 feed (Pd-layer side) into a sweep gas mixture side (support side) as follows: ? ? ? ? H2 Flux PureH2 1 Flux Mixture ? P Concentration Polarization ? Coefficient in the Support = CPCSupport = As a result, we succeed in quantify the influence of the mass transfer resistance due to the presence of inert gas in the pores of the support for different conditions like temperature and sweep flow rate.