Details
| Original language | English |
|---|---|
| Pages (from-to) | 5-9 |
| Number of pages | 5 |
| Journal | Journal of membrane science |
| Volume | 350 |
| Issue number | 1-2 |
| Early online date | 28 Dec 2009 |
| Publication status | Published - 15 Mar 2010 |
Abstract
A novel synthesis strategy was developed for the seeding-free preparation of dense LTA zeolite membranes by using 3-aminopropyltriethoxysilane as covalent linker between zeolite membrane and porous Al2O3 support. In a first step, the ethoxy groups of the 3-aminopropyltriethoxysilane react with surface hydroxy groups of the support. In a second step, the 3-aminopropylsilyl groups react with silanols of the zeolite crystals, leading to a "bridge" between the growing LTA zeolite membrane and the support being built to anchor the LTA zeolite layer onto the support. The SEM image and XRD indicate that a dense and pure LTA zeolite membrane with a thickness of about 3.5 μm can be formed on the α-Al2O3 support, and no cracks, pinholes or other defects are visible. The LTA zeolite membrane displays good molecular sieving performance. For binary mixtures at 20 °C, the separation factors of H2/CH4, H2/N2, H2/O2 and H2/CO2 are 3.6, 4.2, 4.4 and 5.5, respectively, which are higher than the corresponding value of Knudsen diffusion. Moreover, relative high H2 permeances of about 3.0 × 10-7 mol m-2 s-1 Pa-1 can be obtained.
Keywords
- Covalent linker, Hydrothermal synthesis, LTA zeolite membrane, Molecular sieve membrane
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Materials Science(all)
- General Materials Science
- Chemistry(all)
- Physical and Theoretical Chemistry
- Chemical Engineering(all)
- Filtration and Separation
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In: Journal of membrane science, Vol. 350, No. 1-2, 15.03.2010, p. 5-9.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Preparation and separation properties of LTA membranes by using 3-aminopropyltriethoxysilane as covalent linker
AU - Huang, Aisheng
AU - Liang, Fangyi
AU - Steinbach, Frank
AU - Caro, Jürgen
PY - 2010/3/15
Y1 - 2010/3/15
N2 - A novel synthesis strategy was developed for the seeding-free preparation of dense LTA zeolite membranes by using 3-aminopropyltriethoxysilane as covalent linker between zeolite membrane and porous Al2O3 support. In a first step, the ethoxy groups of the 3-aminopropyltriethoxysilane react with surface hydroxy groups of the support. In a second step, the 3-aminopropylsilyl groups react with silanols of the zeolite crystals, leading to a "bridge" between the growing LTA zeolite membrane and the support being built to anchor the LTA zeolite layer onto the support. The SEM image and XRD indicate that a dense and pure LTA zeolite membrane with a thickness of about 3.5 μm can be formed on the α-Al2O3 support, and no cracks, pinholes or other defects are visible. The LTA zeolite membrane displays good molecular sieving performance. For binary mixtures at 20 °C, the separation factors of H2/CH4, H2/N2, H2/O2 and H2/CO2 are 3.6, 4.2, 4.4 and 5.5, respectively, which are higher than the corresponding value of Knudsen diffusion. Moreover, relative high H2 permeances of about 3.0 × 10-7 mol m-2 s-1 Pa-1 can be obtained.
AB - A novel synthesis strategy was developed for the seeding-free preparation of dense LTA zeolite membranes by using 3-aminopropyltriethoxysilane as covalent linker between zeolite membrane and porous Al2O3 support. In a first step, the ethoxy groups of the 3-aminopropyltriethoxysilane react with surface hydroxy groups of the support. In a second step, the 3-aminopropylsilyl groups react with silanols of the zeolite crystals, leading to a "bridge" between the growing LTA zeolite membrane and the support being built to anchor the LTA zeolite layer onto the support. The SEM image and XRD indicate that a dense and pure LTA zeolite membrane with a thickness of about 3.5 μm can be formed on the α-Al2O3 support, and no cracks, pinholes or other defects are visible. The LTA zeolite membrane displays good molecular sieving performance. For binary mixtures at 20 °C, the separation factors of H2/CH4, H2/N2, H2/O2 and H2/CO2 are 3.6, 4.2, 4.4 and 5.5, respectively, which are higher than the corresponding value of Knudsen diffusion. Moreover, relative high H2 permeances of about 3.0 × 10-7 mol m-2 s-1 Pa-1 can be obtained.
KW - Covalent linker
KW - Hydrothermal synthesis
KW - LTA zeolite membrane
KW - Molecular sieve membrane
UR - http://www.scopus.com/inward/record.url?scp=76849094447&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2009.12.029
DO - 10.1016/j.memsci.2009.12.029
M3 - Article
AN - SCOPUS:76849094447
VL - 350
SP - 5
EP - 9
JO - Journal of membrane science
JF - Journal of membrane science
SN - 0376-7388
IS - 1-2
ER -