TY - JOUR
T1 - Hydrogen permeation and recovery from H2-N2 gas mixtures by Pd membranes with high permeance
AU - Chen, Wei Hsin
AU - Hsia, Ming Hsien
AU - Lin, Yu Li
AU - Chi, Yen Hsun
AU - Yang, Chang Chung
N1 - Funding Information:
The authors would like to thank the financial support from Bureau of Energy, Ministry of Economic Affairs, Taiwan, R.O.C. , for this study.
Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/11/13
Y1 - 2013/11/13
N2 - Hydrogen separation from H2-N2 gas mixtures by means of high-permeance Pd membranes is an appropriate route to gain pure hydrogen for fuel cell applications. To figure out the mass transfer phenomena of H 2 in membrane tubes, H2 permeation and recovery characteristics of two high-permeance Pd membranes are investigated. Four important factors influencing H2 permeation, namely, the H 2 pressure difference, H2 concentration, the flow rate at the exit of the retentate side, and membrane temperature, are taken into account. The experimental results suggest that decreasing H2 concentration, flow rate, and temperature reduce the permeances of the membranes and H2 recovery, even though the H2 pressure difference is identical. The dimensionless permeance, a permeance ratio between H 2-N2 gas mixture and pure H2 as feed gases, is used to evaluate the extent of concentration polarization. Within the investigated ranges of the four factors, the dimensionless permeances of the two membranes are in the ranges of 0.022-0.206 and 0.042-0.359, respectively, revealing that the concentration polarization diminishes the permeance of the membranes down to the level within two orders of magnitude. Nevertheless, over 46% of H2 is recovered.
AB - Hydrogen separation from H2-N2 gas mixtures by means of high-permeance Pd membranes is an appropriate route to gain pure hydrogen for fuel cell applications. To figure out the mass transfer phenomena of H 2 in membrane tubes, H2 permeation and recovery characteristics of two high-permeance Pd membranes are investigated. Four important factors influencing H2 permeation, namely, the H 2 pressure difference, H2 concentration, the flow rate at the exit of the retentate side, and membrane temperature, are taken into account. The experimental results suggest that decreasing H2 concentration, flow rate, and temperature reduce the permeances of the membranes and H2 recovery, even though the H2 pressure difference is identical. The dimensionless permeance, a permeance ratio between H 2-N2 gas mixture and pure H2 as feed gases, is used to evaluate the extent of concentration polarization. Within the investigated ranges of the four factors, the dimensionless permeances of the two membranes are in the ranges of 0.022-0.206 and 0.042-0.359, respectively, revealing that the concentration polarization diminishes the permeance of the membranes down to the level within two orders of magnitude. Nevertheless, over 46% of H2 is recovered.
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U2 - 10.1016/j.ijhydene.2013.08.086
DO - 10.1016/j.ijhydene.2013.08.086
M3 - Article
AN - SCOPUS:84886720463
SN - 0360-3199
VL - 38
SP - 14730
EP - 14742
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 34
ER -