Effective approximations for concentration-polarization in Pd-membrane separators

2015 ◽  
Vol 260 ◽  
pp. 835-845 ◽  
Author(s):  
Olga Nekhamkina ◽  
Moshe Sheintuch
Keyword(s):  
Concentration Polarization ◽  
Pd Membrane

Effect of concentration polarization on hydrogen production performance of ceramic-supported Pd membrane module

2015 ◽  
Vol 40 (35) ◽  
pp. 11451-11456 ◽  
Author(s):  
Tatsuya Nakajima ◽  
Takao Kume ◽  
Yoichi Ikeda ◽  
Masahiro Shiraki ◽  
Hideto Kurokawa ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Concentration Polarization ◽  
Membrane Module ◽  
Production Performance ◽  
Pd Membrane ◽  
Supported Pd

Effects of structural and concentration polarization on the efficiency of Pd membrane permeator

2019 ◽  
Vol 148 ◽  
pp. 111279
Author(s):  
Li Deng ◽  
Xingwen Feng ◽  
Guang-Kun Ren ◽  
Jingchuan Wang ◽  
Junhong Luo ◽  
...  
Keyword(s):  
Concentration Polarization ◽  
Pd Membrane

Numerical Study on Concentration Polarization for H2-N2 Separation through a Thin Pd Membrane by Using Computational Fluid Dynamics

2016 ◽  
Vol 11 (1) ◽  
pp. 89-95 ◽  
Author(s):  
Zahra Mansourpour ◽  
Abdolmajid Sharafpoor ◽  
Azadeh Ghaee
Keyword(s):  
Concentration Polarization ◽  
Numerical Study ◽  
Hollow Fiber Membrane ◽  
Fluid Dynamic ◽  
Hydrogen Separation ◽  
Sensitivity Factor ◽  
Unsteady State ◽  
Pd Membrane ◽  
Polarization Controlling ◽  
Good Agreement

Abstract In this paper, a 3D modeling of Hydrogen separation from H2/N2 mixture by pd/α-Al2O3 hollow fiber membrane in steady and unsteady state using computational fluid dynamic was considered. The effect of operating condition such as temperature, pressure and feed flow rate on concentration polarization was examined. Using concept of concentration polarization, controlling mass transfer in membrane module was determined. Also by applying sensitivity factor of flux that is used for analysis of concentration polarization, the best performance of membrane was found. The CFD results show good agreement with experimental data.

Effect of the membrane potential on the performance of ultrafiltration membranes

1986 ◽  
Vol 51 (3) ◽  
pp. 539-544 ◽  
Author(s):  
Hans-Hartmut Schwarz ◽  
Vlastimil Kůdela ◽  
Jaromír Lukáš ◽  
Jiří Vacík ◽  
Volker Gröbe
Keyword(s):  
Membrane Potential ◽  
Concentration Polarization ◽  
Ultrafiltration Membranes ◽  
Membrane Cleaning ◽  
Gel Layer ◽  
Charged Membrane ◽  
Protein Molecules ◽  
Polysulfone Membranes ◽  
Pressure Driven

In the pressure driven process the performance of membranes for ultrafiltration can be changed by incorporating charged groups into the membranes. sulfonation of polysulfone membranes the membrane potential is varied. On interaction of the negatively charged membrane with positively or negatively charged protein molecules the formation of a concentration polarization gel layer proceeds at different rate. Thus, the performance of the membrane can be controlled by the membrane potential. The dependence of the performance on the potential is discussed and procedures for membrane cleaning are suggested.

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