Validation of a dynamic model of hydrogen permeation through Pd-based membranes |
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| Authors: | Angelo Rossi Giacomo Lamonaca Alessia Santucci Silvano Tosti |
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| Institution: | 1. STRUTTURA INFORMATICA, Via delle Panche 79, 50141 Firenze, Italy;2. ENEA, Unità Tecnica Fusione, C.R. ENEA Frascati, Via E. Fermi 45, Frascati (RM) I-00044, Italy;1. Institute Center for Energy (iEnergy), Department of Mechanical & Materials Engineering, Masdar Institute of Science & Technology, Masdar City, P.O. Box 54224, Abu Dhabi, United Arab Emirates;2. Processes, Materials and Solar Energy Laboratory (PROMES – CNRS), 7 rue du Four Solaire, 66120 Font Romeu Odeillo, France.;1. Process Engineering & Applied Science, Dalhousie University, Halifax, NS, Canada;2. Martec Limited, Lloyd''s Register, Halifax, NS, Canada;3. Process Engineering, Memorial University, St. John''s, NL, Canada;1. Egyptian Petroleum Research Institute (EPRI), 1 Ahmed El-Zomor St., Nasr City, 11727 Cairo, Egypt;2. School of Chemical Engineering and Advanced Materials, Newcastle University, NE1 7RU Newcastle upon Tyne, UK;1. Kocel New Energy Material Company, Yinchuan 750002, PR China;2. Jinchuan Group Ltd., Jinchang 737100, PR China;1. School of Chemistry and Life Science, Changchun University of Technology, Changchun, 130012, China;2. Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, China |
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| Abstract: | Pd-based membranes have been studied for pure hydrogen separation from syngas: in particular, a mathematical model of a Pd membrane for hydrogen separation has been developed.This model can be used in process and assessment studies of the parameters which characterize the mass transfer phenomena (such as: hydrogen permeability, surface coverage and limiting step). By coupling the permeation and water gas shift reaction kinetics, it can also be used to evaluate the performances of the membrane reactor. Further, it can be helpful to evaluate the best assembly and sizing of a H2/CO2 separation system.The model takes into account the kinetics of H2 adsorption/desorption on Pd surface, the H2 permeation into the palladium bulk and in the porous layer, and the kinetics of CO, CO2, H2O, O2, H2S competitive adsorption/desorption on Pd surface. It is also comprehensive of flux equations and bulk mass, momentum and energy balance.The results released by the model were compared to the experimental data during both the transient phase and the steady state conditions. A satisfactory agreement between model and experimental data was found. |
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