Details
| Original language | English |
|---|---|
| Pages (from-to) | 147-157 |
| Number of pages | 11 |
| Journal | Microporous and Mesoporous Materials |
| Volume | 82 |
| Issue number | 1-2 |
| Early online date | 25 Apr 2005 |
| Publication status | Published - 5 Jul 2005 |
Abstract
MFI membranes with Si/Al ratios between 57 and ∞ were prepared on metallic and ceramic supports as part of ongoing work to develop membranes for membrane reactor applications. The membranes were characterized by H2 and SF6 single gas permeation measurements under various conditions, by mixture permeation studies of H2:SF6 = 1:1, and of n-pentane:i-pentane = 1:1 as well as by permporosimetry in order to estimate the relative contributions of inter- and intracrystalline membrane transport. The permeation properties are mainly influenced by the Al content in the MFI layers but not by the type of the support. From permporosimetry and the n/i-pentane and H2/SF6 mixture permeation it follows that the intercrystalline permeance increases with increasing Al content and therefore the mixture selectivities are low for Al-rich MFI membranes. The ZSM-5 membrane with the highest Al content (Si/Al = 57) behaves exceptionally since it separates H2/SF6 mixtures but not n/i-pentane mixtures. The permeation results depend strongly on the measurement conditions such as the pressure difference across the membrane and are influenced by the calcination parameters of the membrane.
Keywords
- Ceramic support, Metallic support, MFI membrane, Mixture permeation, Permporosimetry, Si/Al ratio, Single gas permeation
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
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In: Microporous and Mesoporous Materials, Vol. 82, No. 1-2, 05.07.2005, p. 147-157.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of Si/Al ratio, pre-treatment and measurement conditions on permeation properties of MFI membranes on metallic and ceramic supports
AU - Noack, M.
AU - Mabande, G. T.P.
AU - Caro, J.
AU - Georgi, G.
AU - Schwieger, W.
AU - Kölsch, P.
AU - Avhale, A.
PY - 2005/7/5
Y1 - 2005/7/5
N2 - MFI membranes with Si/Al ratios between 57 and ∞ were prepared on metallic and ceramic supports as part of ongoing work to develop membranes for membrane reactor applications. The membranes were characterized by H2 and SF6 single gas permeation measurements under various conditions, by mixture permeation studies of H2:SF6 = 1:1, and of n-pentane:i-pentane = 1:1 as well as by permporosimetry in order to estimate the relative contributions of inter- and intracrystalline membrane transport. The permeation properties are mainly influenced by the Al content in the MFI layers but not by the type of the support. From permporosimetry and the n/i-pentane and H2/SF6 mixture permeation it follows that the intercrystalline permeance increases with increasing Al content and therefore the mixture selectivities are low for Al-rich MFI membranes. The ZSM-5 membrane with the highest Al content (Si/Al = 57) behaves exceptionally since it separates H2/SF6 mixtures but not n/i-pentane mixtures. The permeation results depend strongly on the measurement conditions such as the pressure difference across the membrane and are influenced by the calcination parameters of the membrane.
AB - MFI membranes with Si/Al ratios between 57 and ∞ were prepared on metallic and ceramic supports as part of ongoing work to develop membranes for membrane reactor applications. The membranes were characterized by H2 and SF6 single gas permeation measurements under various conditions, by mixture permeation studies of H2:SF6 = 1:1, and of n-pentane:i-pentane = 1:1 as well as by permporosimetry in order to estimate the relative contributions of inter- and intracrystalline membrane transport. The permeation properties are mainly influenced by the Al content in the MFI layers but not by the type of the support. From permporosimetry and the n/i-pentane and H2/SF6 mixture permeation it follows that the intercrystalline permeance increases with increasing Al content and therefore the mixture selectivities are low for Al-rich MFI membranes. The ZSM-5 membrane with the highest Al content (Si/Al = 57) behaves exceptionally since it separates H2/SF6 mixtures but not n/i-pentane mixtures. The permeation results depend strongly on the measurement conditions such as the pressure difference across the membrane and are influenced by the calcination parameters of the membrane.
KW - Ceramic support
KW - Metallic support
KW - MFI membrane
KW - Mixture permeation
KW - Permporosimetry
KW - Si/Al ratio
KW - Single gas permeation
UR - http://www.scopus.com/inward/record.url?scp=20144365896&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2005.03.007
DO - 10.1016/j.micromeso.2005.03.007
M3 - Article
AN - SCOPUS:20144365896
VL - 82
SP - 147
EP - 157
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
IS - 1-2
ER -