TY - JOUR
T1 - Influences of geometry and flow pattern on hydrogen separation in a Pd-based membrane tube
AU - Chen, Wei Hsin
AU - Syu, Wei Ze
AU - Hung, Chen I.
AU - Lin, Yu Li
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 .
PY - 2013/1/24
Y1 - 2013/1/24
N2 - The abatement of concentration polarization in a membrane tube is of the utmost importance for improving the efficiency of hydrogen separation. In order to enhance the performance of hydrogen separation, the characteristics of hydrogen permeation in a Pd-based membrane system under various operating conditions and geometric designs are studied numerically. The effects of Reynolds numbers, shell size, baffle, and pressure difference on hydrogen mass transfer across the membrane are evaluated. The predictions suggest that a larger shell deteriorates concentration polarization, stemming from a larger H2 concentration boundary layer. Baffles equipped in the shell are conducive to disturbing H2 concentration boundary layer and reducing concentration polarization at the retentate side, thereby intensifying H 2 permeation. The more the number of baffles, the less the increment of improvement in H2 permeation is. The installation of one baffle is recommended for enhancing H2 separation and it is especially obvious under the environments of high pressure difference. Within the investigated ranges of Reynolds number at the permeate side and the retentate side, the feasible operating conditions are suggested in this study.
AB - The abatement of concentration polarization in a membrane tube is of the utmost importance for improving the efficiency of hydrogen separation. In order to enhance the performance of hydrogen separation, the characteristics of hydrogen permeation in a Pd-based membrane system under various operating conditions and geometric designs are studied numerically. The effects of Reynolds numbers, shell size, baffle, and pressure difference on hydrogen mass transfer across the membrane are evaluated. The predictions suggest that a larger shell deteriorates concentration polarization, stemming from a larger H2 concentration boundary layer. Baffles equipped in the shell are conducive to disturbing H2 concentration boundary layer and reducing concentration polarization at the retentate side, thereby intensifying H 2 permeation. The more the number of baffles, the less the increment of improvement in H2 permeation is. The installation of one baffle is recommended for enhancing H2 separation and it is especially obvious under the environments of high pressure difference. Within the investigated ranges of Reynolds number at the permeate side and the retentate side, the feasible operating conditions are suggested in this study.
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U2 - 10.1016/j.ijhydene.2012.10.068
DO - 10.1016/j.ijhydene.2012.10.068
M3 - Article
AN - SCOPUS:84872025539
SN - 0360-3199
VL - 38
SP - 1145
EP - 1156
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 2
ER -
