Performance and Long-Term Stability of Pd/PSS and Pd/Al2O3 Membranes for Hydrogen Separation
The present work is focused on the investigation of the performance and long-term stability of two composite palladium membranes under different operating conditions. One membrane (Pd/porous stainless steel (PSS)) is characterized by a ~10 µm-thick palladium layer on a porous stainless steel subst...
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doaj-e9b0ce62d3c5485c87dc473cdd695a252020-11-24T20:48:56ZengMDPI AGMembranes2077-03752014-03-014114316210.3390/membranes4010143membranes4010143Performance and Long-Term Stability of Pd/PSS and Pd/Al2O3 Membranes for Hydrogen SeparationSimona Liguori0Adolfo Iulianelli1Francesco Dalena2Pietro Pinacci3Francesca Drago4Maria Broglia5Yan Huang6Angelo Basile7Institute on Membrane Technology of Italian National Research Council (ITM-CNR), c/o University of Calabria, Cubo 17/C, Rende (CS) 87036, ItalyInstitute on Membrane Technology of Italian National Research Council (ITM-CNR), c/o University of Calabria, Cubo 17/C, Rende (CS) 87036, ItalyChemistry and Chemical Technologies Department, University of Calabria, Cubo 15/D, Via P. Bucci, Rende (CS) 87036, ItalyRSE S.p.A., Via Rubattino 54, Milano (MI) 20134, ItalyRSE S.p.A., Via Rubattino 54, Milano (MI) 20134, ItalyRSE S.p.A., Via Rubattino 54, Milano (MI) 20134, ItalyState Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry & Chemical Engineering, Nanjing University of Technology, Xin-Mo-Fan Road 5, Nanjing 210009, ChinaInstitute on Membrane Technology of Italian National Research Council (ITM-CNR), c/o University of Calabria, Cubo 17/C, Rende (CS) 87036, ItalyThe present work is focused on the investigation of the performance and long-term stability of two composite palladium membranes under different operating conditions. One membrane (Pd/porous stainless steel (PSS)) is characterized by a ~10 µm-thick palladium layer on a porous stainless steel substrate, which is pretreated by means of surface modification and oxidation; the other membrane (Pd/Al2O3) is constituted by a ~7 µm-thick palladium layer on an asymmetric microporous Al2O3 substrate. The operating temperature and pressure ranges, used for studying the performance of these two kinds of membranes, are 350–450 °C and 200–800 kPa, respectively. The H2 permeances and the H2/N2 selectivities of both membranes were investigated and compared with literature data. At 400 °C and 200 kPa as pressure difference, Pd/PSS and Pd/Al2O3 membranes exhibited an H2/N2 ideal selectivity equal to 11700 and 6200, respectively, showing stability for 600 h. Thereafter, H2/N2 selectivity of both membranes progressively decreased and after around 2000 h, dropped dramatically to 55 and 310 for the Pd/PSS and Pd/Al2O3 membranes, respectively. As evidenced by Scanning Electron Microscope (SEM) analyses, the pinholes appear on the whole surface of the Pd/PSS membrane and this is probably due to release of sulphur from the graphite seal rings.http://www.mdpi.com/2077-0375/4/1/143palladium composite membraneporous stainless steelideal selectivityhydrogen separation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Simona Liguori Adolfo Iulianelli Francesco Dalena Pietro Pinacci Francesca Drago Maria Broglia Yan Huang Angelo Basile |
spellingShingle |
Simona Liguori Adolfo Iulianelli Francesco Dalena Pietro Pinacci Francesca Drago Maria Broglia Yan Huang Angelo Basile Performance and Long-Term Stability of Pd/PSS and Pd/Al2O3 Membranes for Hydrogen Separation Membranes palladium composite membrane porous stainless steel ideal selectivity hydrogen separation |
author_facet |
Simona Liguori Adolfo Iulianelli Francesco Dalena Pietro Pinacci Francesca Drago Maria Broglia Yan Huang Angelo Basile |
author_sort |
Simona Liguori |
title |
Performance and Long-Term Stability of Pd/PSS and Pd/Al2O3 Membranes for Hydrogen Separation |
title_short |
Performance and Long-Term Stability of Pd/PSS and Pd/Al2O3 Membranes for Hydrogen Separation |
title_full |
Performance and Long-Term Stability of Pd/PSS and Pd/Al2O3 Membranes for Hydrogen Separation |
title_fullStr |
Performance and Long-Term Stability of Pd/PSS and Pd/Al2O3 Membranes for Hydrogen Separation |
title_full_unstemmed |
Performance and Long-Term Stability of Pd/PSS and Pd/Al2O3 Membranes for Hydrogen Separation |
title_sort |
performance and long-term stability of pd/pss and pd/al2o3 membranes for hydrogen separation |
publisher |
MDPI AG |
series |
Membranes |
issn |
2077-0375 |
publishDate |
2014-03-01 |
description |
The present work is focused on the investigation of the performance and long-term stability of two composite palladium membranes under different operating conditions. One membrane (Pd/porous stainless steel (PSS)) is characterized by a ~10 µm-thick palladium layer on a porous stainless steel substrate, which is pretreated by means of surface modification and oxidation; the other membrane (Pd/Al2O3) is constituted by a ~7 µm-thick palladium layer on an asymmetric microporous Al2O3 substrate. The operating temperature and pressure ranges, used for studying the performance of these two kinds of membranes, are 350–450 °C and 200–800 kPa, respectively. The H2 permeances and the H2/N2 selectivities of both membranes were investigated and compared with literature data. At 400 °C and 200 kPa as pressure difference, Pd/PSS and Pd/Al2O3 membranes exhibited an H2/N2 ideal selectivity equal to 11700 and 6200, respectively, showing stability for 600 h. Thereafter, H2/N2 selectivity of both membranes progressively decreased and after around 2000 h, dropped dramatically to 55 and 310 for the Pd/PSS and Pd/Al2O3 membranes, respectively. As evidenced by Scanning Electron Microscope (SEM) analyses, the pinholes appear on the whole surface of the Pd/PSS membrane and this is probably due to release of sulphur from the graphite seal rings. |
topic |
palladium composite membrane porous stainless steel ideal selectivity hydrogen separation |
url |
http://www.mdpi.com/2077-0375/4/1/143 |
work_keys_str_mv |
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