Modelling the effect of operating conditions on hydrodynamics and mass transfer in a Pd–Ag membrane module for H2 purification

Modeling of the variations of permeate flux, concentration polarization, and solute rejection in nanofiltration system

“…For all other computational cells, source terms are imposed to be zero. In fact, such a coupling method has been successfully applied to the modeling of other membrane systems, for example, those for gas separation by Coroneo et al and Ji et al To be clear, Figure outlines the entire coupling method, which includes the following key steps: The sources terms Eqs. – are calculated according to the transmembrane fluxes ( J v , J s ) obtained using Eqs.…”

Water gas shift membrane reactors

“…Therefore, two-and/or three-dimensional models have been also considered to more realistically describe all of the physical phenomena occurring in an MR during the WGS reaction (Chen, Syu, & Hung, 2012;Coroneo, Montante, Catalano, & Paglianti, 2009;Marin, Diez, & Ordonez, 2012;Smith & Muruganandam, 2011). Therefore, two-and/or three-dimensional models have been also considered to more realistically describe all of the physical phenomena occurring in an MR during the WGS reaction (Chen, Syu, & Hung, 2012;Coroneo, Montante, Catalano, & Paglianti, 2009;Marin, Diez, & Ordonez, 2012;Smith & Muruganandam, 2011).…”

Numerical and Experimental Fluid-Dynamic Analysis To Improve the Mass Transfer Performances of Pd−Ag Membrane Modules for Hydrogen Purification

“…As already shown by Coroneo et al, 12,13 depending on each specific membrane, any mechanism can be included in the model by means of eq 3 or 6. For instance, if the membrane mass transfer resistance is only due to the Pd-Ag layer, the so-called Sieverts law 23-25 can be selected and consequently the following form for the source term can be implemented in the model:…”

“…In particular, a mixture of H 2 , CH 4 , H 2 O, and CO 2 was fed to the pilot module from the shell inlet tube, since the Pd selective layer was assumed to be deposited on the tube external surface, while no sweeping stream was considered to flow inside the tube. The CO contribution was neglected as the specific problem of including in the CFD model a suitable correlation for taking into account the interaction of CO with the membrane metallic layer has been already tackled by Coroneo et al 13 The working conditions considered for the simulations are reported in Table 1.…”