CFD simulation of hydrogen separation in Pd hollow fiber membrane
Paper ID : 1228-MST2015-FULL
seyed morteza sadeghnejad1, Mohammadreza Boskabadi2
1School of Chemical Engineering, College of Engineering, University of Tehran, Iran.
2School of Chemical Engineering, College of Engineering, University of Tehran, Iran
Performance of Pd hollow fiber membrane (HFM) for hydrogen separation from gaseous mixture of hydrogen and nitrogen was simulated. A 2D mathematical model was proposed to study transport of H2 through a HFM. The model considers axial and radial diffusion in the HFM. It also considers convection in tube and shell sides. CFD techniques were applied to solve the model equations involving continuity and momentum equations. Numerical results was reasonably accurate in comparison with experimental data. Concentration distribution was obtained and the effects of operating conditions such as temperature, pressure and flow rate of feed intake on hydrogen separation were investigated. It was shown that amount of separation increases with pressure difference, temperature and flow rate. Interestingly, separation efficiency increases with pressure difference and temperature while it was adversely affected by increasing flow rate. A comparison between Poiseuille and Knudsen was also carried out to identify the dominant mechanism and it was found that the latter plays the most prominent role in diffusion process.
Hollow fiber membrane, Numerical simulation, Knudsen Diffusion, Hydrogen separation
Status : Paper Accepted (Oral Presentation)