Details
| Translated title of the contribution | Development of porous ceramical membranes for molecular separations |
|---|---|
| Original language | German |
| Pages (from-to) | 23-27 |
| Number of pages | 5 |
| Journal | Chemische Technik (Leipzig) |
| Volume | 52 |
| Issue number | 1 |
| Publication status | Published - Feb 2000 |
| Externally published | Yes |
Abstract
Inorganic membranes exhibit such properties like temperature stability and solvent resistance which allow new applications. The manufacturing and use of ceramic micro- and ultrafiltration membranes has become state of the art. This paper reports about the techniques to modify commercial micro- and ultrafiltration ceramics for molecular separations. By coating the supports with polymeric Ti oxide sols, nanofiltration membranes with a cut off near 500 Dalton have been obtained. The in situ hydrolysis of TEOS (tetraethylorthosilicate) gives hydrophilic SiO 2 layers for pervaporation with water fluxes >1 kg water per m 2 h. The coating of the supports with inorganic polymer sols, especially SiO 2 sols, results in temperature stable (550 °C) hydrogen selective membranes. Pinhole- and crack-free zeolite membranes allow shape selective permeation as well as hydrophilic-hydrophobic separations. The silicalite membrane separates methanol and MTBE due to their molecular size (0.39 and 0.63 nm, resp.) and provides separation factors between 55 and 250. The hydrophilic ZSM-5-membrane with Si/Al≈14 allows hydrophilic/hydrophobic separations by pervaporation, for example water is separated from mixtures of water/i-propanol of the composition 5% water/95% i-propanol with separation factors of water/i-propanol ≈500.
ASJC Scopus subject areas
- Chemical Engineering(all)
- General Chemical Engineering
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In: Chemische Technik (Leipzig), Vol. 52, No. 1, 02.2000, p. 23-27.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Entwicklung poroeser keramischer Membranen mit molekularer Trennleistung
AU - Caro, Jürgen
AU - Kölsch, Peter
AU - Noack, Manfred
AU - Schäfer, Ronald
AU - Voigt, Ingolf
AU - Fischer, Gundula
AU - Puhlfürß, Petra
AU - Richter, Hannes
PY - 2000/2
Y1 - 2000/2
N2 - Inorganic membranes exhibit such properties like temperature stability and solvent resistance which allow new applications. The manufacturing and use of ceramic micro- and ultrafiltration membranes has become state of the art. This paper reports about the techniques to modify commercial micro- and ultrafiltration ceramics for molecular separations. By coating the supports with polymeric Ti oxide sols, nanofiltration membranes with a cut off near 500 Dalton have been obtained. The in situ hydrolysis of TEOS (tetraethylorthosilicate) gives hydrophilic SiO 2 layers for pervaporation with water fluxes >1 kg water per m 2 h. The coating of the supports with inorganic polymer sols, especially SiO 2 sols, results in temperature stable (550 °C) hydrogen selective membranes. Pinhole- and crack-free zeolite membranes allow shape selective permeation as well as hydrophilic-hydrophobic separations. The silicalite membrane separates methanol and MTBE due to their molecular size (0.39 and 0.63 nm, resp.) and provides separation factors between 55 and 250. The hydrophilic ZSM-5-membrane with Si/Al≈14 allows hydrophilic/hydrophobic separations by pervaporation, for example water is separated from mixtures of water/i-propanol of the composition 5% water/95% i-propanol with separation factors of water/i-propanol ≈500.
AB - Inorganic membranes exhibit such properties like temperature stability and solvent resistance which allow new applications. The manufacturing and use of ceramic micro- and ultrafiltration membranes has become state of the art. This paper reports about the techniques to modify commercial micro- and ultrafiltration ceramics for molecular separations. By coating the supports with polymeric Ti oxide sols, nanofiltration membranes with a cut off near 500 Dalton have been obtained. The in situ hydrolysis of TEOS (tetraethylorthosilicate) gives hydrophilic SiO 2 layers for pervaporation with water fluxes >1 kg water per m 2 h. The coating of the supports with inorganic polymer sols, especially SiO 2 sols, results in temperature stable (550 °C) hydrogen selective membranes. Pinhole- and crack-free zeolite membranes allow shape selective permeation as well as hydrophilic-hydrophobic separations. The silicalite membrane separates methanol and MTBE due to their molecular size (0.39 and 0.63 nm, resp.) and provides separation factors between 55 and 250. The hydrophilic ZSM-5-membrane with Si/Al≈14 allows hydrophilic/hydrophobic separations by pervaporation, for example water is separated from mixtures of water/i-propanol of the composition 5% water/95% i-propanol with separation factors of water/i-propanol ≈500.
UR - http://www.scopus.com/inward/record.url?scp=0034138948&partnerID=8YFLogxK
M3 - Artikel
AN - SCOPUS:0034138948
VL - 52
SP - 23
EP - 27
JO - Chemische Technik (Leipzig)
JF - Chemische Technik (Leipzig)
SN - 0045-6519
IS - 1
ER -