Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 294-301 |
| Seitenumfang | 8 |
| Fachzeitschrift | Microporous and Mesoporous Materials |
| Jahrgang | 164 |
| Frühes Online-Datum | 20 Juni 2012 |
| Publikationsstatus | Veröffentlicht - 1 Dez. 2012 |
Abstract
A facile strategy for the layer-by-layer synthesis of sandwich-like zeolite LTA membranes by using 3-aminopropyltriethoxysilane (APTES) as modifier is reported. APTES reacts with surface hydroxyls and forms a covalently bonded siloxane interlayer. APTES treatment is helpful to promote nucleation and growth of the zeolite LTA layer on solid surfaces. Further, the covalently bonded self-assembled siloxane film can protect the already formed LTA layer from dissolution and transformation during the next hydrothermal LTA synthesis step, thus facilitating the formation of well intergrown and phase-pure multi-layer zeolite LTA membranes. The multi-layer zeolite LTA membranes display molecular sieving performance, and each additional LTA layer improves the selectivity of the sandwich-like LTA layer stack. In mixed gas separation at 100°C, the mixture separation factors for equimolar mixtures of H 2/CO 2, H 2/N 2, H 2/CH 4 and H 2/C 3H 8, on the single/multi-layer LTA zeolite membranes in the Na + state are found to be 6.3, 5.6, 4.3 and 6.5 (single-layer), 8.8, 7.2, 5.8 and 12.6 (double-layer), and 12.5, 8.6, 6.5 and 19.3 (triple-layer).
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Allgemeine Chemie
- Werkstoffwissenschaften (insg.)
- Allgemeine Materialwissenschaften
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Ingenieurwesen (insg.)
- Werkstoffmechanik
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in: Microporous and Mesoporous Materials, Jahrgang 164, 01.12.2012, S. 294-301.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Synthesis of multi-layer zeolite LTA membranes with enhanced gas separation performance by using 3-aminopropyltriethoxysilane as interlayer
AU - Huang, Aisheng
AU - Wang, Nanyi
AU - Caro, Jürgen
PY - 2012/12/1
Y1 - 2012/12/1
N2 - A facile strategy for the layer-by-layer synthesis of sandwich-like zeolite LTA membranes by using 3-aminopropyltriethoxysilane (APTES) as modifier is reported. APTES reacts with surface hydroxyls and forms a covalently bonded siloxane interlayer. APTES treatment is helpful to promote nucleation and growth of the zeolite LTA layer on solid surfaces. Further, the covalently bonded self-assembled siloxane film can protect the already formed LTA layer from dissolution and transformation during the next hydrothermal LTA synthesis step, thus facilitating the formation of well intergrown and phase-pure multi-layer zeolite LTA membranes. The multi-layer zeolite LTA membranes display molecular sieving performance, and each additional LTA layer improves the selectivity of the sandwich-like LTA layer stack. In mixed gas separation at 100°C, the mixture separation factors for equimolar mixtures of H 2/CO 2, H 2/N 2, H 2/CH 4 and H 2/C 3H 8, on the single/multi-layer LTA zeolite membranes in the Na + state are found to be 6.3, 5.6, 4.3 and 6.5 (single-layer), 8.8, 7.2, 5.8 and 12.6 (double-layer), and 12.5, 8.6, 6.5 and 19.3 (triple-layer).
AB - A facile strategy for the layer-by-layer synthesis of sandwich-like zeolite LTA membranes by using 3-aminopropyltriethoxysilane (APTES) as modifier is reported. APTES reacts with surface hydroxyls and forms a covalently bonded siloxane interlayer. APTES treatment is helpful to promote nucleation and growth of the zeolite LTA layer on solid surfaces. Further, the covalently bonded self-assembled siloxane film can protect the already formed LTA layer from dissolution and transformation during the next hydrothermal LTA synthesis step, thus facilitating the formation of well intergrown and phase-pure multi-layer zeolite LTA membranes. The multi-layer zeolite LTA membranes display molecular sieving performance, and each additional LTA layer improves the selectivity of the sandwich-like LTA layer stack. In mixed gas separation at 100°C, the mixture separation factors for equimolar mixtures of H 2/CO 2, H 2/N 2, H 2/CH 4 and H 2/C 3H 8, on the single/multi-layer LTA zeolite membranes in the Na + state are found to be 6.3, 5.6, 4.3 and 6.5 (single-layer), 8.8, 7.2, 5.8 and 12.6 (double-layer), and 12.5, 8.6, 6.5 and 19.3 (triple-layer).
KW - Covalent linker
KW - Layer-by-layer synthesis
KW - LTA zeolite membrane
KW - Molecular sieve membrane
UR - http://www.scopus.com/inward/record.url?scp=84867404123&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2012.06.018
DO - 10.1016/j.micromeso.2012.06.018
M3 - Article
AN - SCOPUS:84867404123
VL - 164
SP - 294
EP - 301
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
ER -