Coupling Newton-Raphson and Bisection Solving Methods to Simulate Hydrogen Permeation through Pd-based Membranes with Inhibition by CO and Concentration Polarization

In this work, hydrogen permeation through Pd-based membranes is modeled and simulated taking into account the presence of both concentration polarization and inhibition by CO. Hydrogen permeation is described as a series of several elementary steps, which are numerically solved by means of a method combining a Newton-Raphson and bisection routines. The results are expressed in terms of maps of the permeation reduction coefficient (PRC), which is a coefficient taking into account the permeance reduction due to polarization and inhibition. This model can be very useful to improve the design of the Pd-based membrane separation modules, being able to be fully integrated as a separated numerical routine in CFD commercial software.