Impact of vacuum operation on hydrogen permeation through a palladium membrane tube

Wei Hsin Chen, Shang Wei Lin, Chia Yang Chen, Yen Hsun Chi, Yu Li Lin

研究成果: Article

2 引文 (Scopus)

摘要

Palladium (Pd) membranes are characterized by their high permselectivity to hydrogen and easy operation, and are promising devises for separating hydrogen from hydrogen-rich gases. The membranes are normally operated with atmospheric pressure at the permeate side. Instead of this common operation, hydrogen permeation through a Pd membrane under vacuum operation at the permeate side is investigated and compared with that under normal operation. In this study, two membrane operating temperatures (320 and 380 °C), four H2 partial pressure differences (2, 3, 4, and 5 atm) across the membrane, and four feed gases are considered. The results suggest that the vacuum operation can efficiently intensify the H2 permeation rate. The improvement in H2 permeation rate due to the vacuum operation can be increased up to 136%. The positive effect of the vacuum operation is especially pronounced when the gas mixtures are used as the feed gases, stemming from the effective attenuation of the concentration polarization. An increase in membrane temperature raises the H2 permeation rate, but its influence in enhancing the H2 permeation rate with the vacuum operation is not as significant as that without the vacuum one. It is found that the retardation effect of impurities on the mass transfer is always ranked as CO > CO2 > N2, regardless of with/without vacuum operation.

原文English
頁(從 - 到)14434-14444
頁數11
期刊International Journal of Hydrogen Energy
44
發行號28
DOIs
出版狀態Published - 2019 五月 31

指紋

Permeation
Palladium
palladium
Vacuum
tubes
membranes
Membranes
Hydrogen
vacuum
hydrogen
Gases
gases
Gas mixtures
Partial pressure
Atmospheric pressure
Mass transfer
operating temperature
Impurities
mass transfer
Polarization

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

引用此文

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abstract = "Palladium (Pd) membranes are characterized by their high permselectivity to hydrogen and easy operation, and are promising devises for separating hydrogen from hydrogen-rich gases. The membranes are normally operated with atmospheric pressure at the permeate side. Instead of this common operation, hydrogen permeation through a Pd membrane under vacuum operation at the permeate side is investigated and compared with that under normal operation. In this study, two membrane operating temperatures (320 and 380 °C), four H2 partial pressure differences (2, 3, 4, and 5 atm) across the membrane, and four feed gases are considered. The results suggest that the vacuum operation can efficiently intensify the H2 permeation rate. The improvement in H2 permeation rate due to the vacuum operation can be increased up to 136{\%}. The positive effect of the vacuum operation is especially pronounced when the gas mixtures are used as the feed gases, stemming from the effective attenuation of the concentration polarization. An increase in membrane temperature raises the H2 permeation rate, but its influence in enhancing the H2 permeation rate with the vacuum operation is not as significant as that without the vacuum one. It is found that the retardation effect of impurities on the mass transfer is always ranked as CO > CO2 > N2, regardless of with/without vacuum operation.",
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Impact of vacuum operation on hydrogen permeation through a palladium membrane tube. / Chen, Wei Hsin; Lin, Shang Wei; Chen, Chia Yang; Chi, Yen Hsun; Lin, Yu Li.

於: International Journal of Hydrogen Energy, 卷 44, 編號 28, 31.05.2019, p. 14434-14444.

研究成果: Article

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AU - Lin, Yu Li

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Y1 - 2019/5/31

N2 - Palladium (Pd) membranes are characterized by their high permselectivity to hydrogen and easy operation, and are promising devises for separating hydrogen from hydrogen-rich gases. The membranes are normally operated with atmospheric pressure at the permeate side. Instead of this common operation, hydrogen permeation through a Pd membrane under vacuum operation at the permeate side is investigated and compared with that under normal operation. In this study, two membrane operating temperatures (320 and 380 °C), four H2 partial pressure differences (2, 3, 4, and 5 atm) across the membrane, and four feed gases are considered. The results suggest that the vacuum operation can efficiently intensify the H2 permeation rate. The improvement in H2 permeation rate due to the vacuum operation can be increased up to 136%. The positive effect of the vacuum operation is especially pronounced when the gas mixtures are used as the feed gases, stemming from the effective attenuation of the concentration polarization. An increase in membrane temperature raises the H2 permeation rate, but its influence in enhancing the H2 permeation rate with the vacuum operation is not as significant as that without the vacuum one. It is found that the retardation effect of impurities on the mass transfer is always ranked as CO > CO2 > N2, regardless of with/without vacuum operation.

AB - Palladium (Pd) membranes are characterized by their high permselectivity to hydrogen and easy operation, and are promising devises for separating hydrogen from hydrogen-rich gases. The membranes are normally operated with atmospheric pressure at the permeate side. Instead of this common operation, hydrogen permeation through a Pd membrane under vacuum operation at the permeate side is investigated and compared with that under normal operation. In this study, two membrane operating temperatures (320 and 380 °C), four H2 partial pressure differences (2, 3, 4, and 5 atm) across the membrane, and four feed gases are considered. The results suggest that the vacuum operation can efficiently intensify the H2 permeation rate. The improvement in H2 permeation rate due to the vacuum operation can be increased up to 136%. The positive effect of the vacuum operation is especially pronounced when the gas mixtures are used as the feed gases, stemming from the effective attenuation of the concentration polarization. An increase in membrane temperature raises the H2 permeation rate, but its influence in enhancing the H2 permeation rate with the vacuum operation is not as significant as that without the vacuum one. It is found that the retardation effect of impurities on the mass transfer is always ranked as CO > CO2 > N2, regardless of with/without vacuum operation.

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