Preparation of Al2O3 Supports for Thin Membrane Fabrication

Yıl 2018, Cilt: 5 Sayı: 1, 191 - 204, 01.09.2017

Berna Topuz , Ali Semih Yurttas Ali Altunsoy

https://doi.org/10.18596/jotcsa.351708

Cited By: 2

Öz

In this study, macroporous a-alumina
supports were prepared by using vacuum assisted filtration of α-Al₂O₃suspensions
with different particle size.
The average particle sizes of the powders are 400 and 200 nm. The prepared supports had smooth and
uniform surface microstructure and well suited for the fabrication of thin continuous
membrane. The microstructure consists of a random
close packing of 200 nm particles led to improved surface uniformity and
roughness. ZnO spheres were prepared by homogeneous precipitation and added
to the colloidal suspension to modify the support structure and increase the
support flux. Structural parameters such as pore diameter and
tortuosity of the prepared macroporous supports were estimated by using He, N₂,
CO₂ permeance measurements. Slight
pressure dependence in the permeance values indicated the contribution of viscous
flow to the Knudsen flow. The supports
prepared by alumina powder with a larger particle size exhibited He permeance of three times
higher than that of prepared with a smaller particle size. The
addition of ZnO resulted in the increase in He permeance value significantly
for the support prepared by 400 nm particles in size. He permeance was in a
range of 8.5-8.7x10^-6 mol/(m²sPa)
which is very close to the desired value of 1x10^-5 mol/(m²sPa).

Anahtar Kelimeler

membrane, support, alumina, high flux, colloidal processing

Kaynakça

• 1. Sholl DS, Lively RP. Seven chemical separations to change the world. Nature. 2016;532:435-7.
• 2. Mottern ML, Shqau K, Shi JY, Yu D, Verweij H. Thin supported inorganic membranes for energy-related gas and water purification. International Journal of Hydrogen Energy. 2007;32(16):3713-23.
• 3. Agrawal KV, Topuz B, Pham TCT, Nguyen TH, Sauer N, Rangnekar N, et al. Oriented MFI Membranes by Gel-Less Secondary Growth of Sub-100 nm MFI-Nanosheet Seed Layers. Advanced Materials. 2015;27(21):3243-9.
• 4. Zhou H, Korelskiy D, Sjöberg E, Hedlund J. Ultrathin hydrophobic MFI membranes. Microporous and Mesoporous Materials. 2014;192:76-81.
• 5. de Vos RM, Verweij H. High-Selectivity, High-Flux Silica Membranes for Gas Separation. Science. 1998;279(5357):1710-1.
• 6. van Veen HM, Rietkerk MDA, Shanahan DP, van Tuel MMA, Kreiter R, Castricum HL, et al. Pushing membrane stability boundaries with HybSi® pervaporation membranes. Journal of Membrane Science. 2011;380(1):124-31.
• 7. Bissett H, Zah J, Krieg HM. Manufacture and optimization of tubular ceramic membrane supports. Powder Technology. 2008;181(1):57-66.
• 8. Mottern M, Chiu W, Warchol Z, Shqau K, Verweij H. High-performance membrane supports: A colloidal approach to the consolidation of coarse particles. International Journal of Hydrogen Energy. 2008;33(14):3903-14.
• 9. Chang CH, Gopalan R, Lin YS. A comparative study on thermal and hydrothermal stability of alumina, titania and zirconia membranes. Journal of Membrane Science. 1994;91(1–2):27-45.
• 10. Larbot A, Alami-Younssi S, Persin M, Sarrazin J, Cot L. Preparation of a γ-alumina nanofiltration membrane. Journal of Membrane Science. 1994;97:167-73.
• 11. Bruni YL, Garrido LB, Aglietti EF. Effect of high alumina cement on permeability and structure properties of ZrO2 composites. Ceramics International. 2012;38(3):1755-63.
• 12. Shojai F, Mäntylä T. Monoclinic Zirconia Microfiltration Membranes: Preparation and Characterization. Journal of Porous Materials.8(2):129-42.
• 13. Van Gestel T, Vandecasteele C, Buekenhoudt A, Dotremont C, Luyten J, Leysen R, et al. Alumina and titania multilayer membranes for nanofiltration: preparation, characterization and chemical stability. Journal of Membrane Science. 2002;207(1):73-89.
• 14. Cesarano J, Aksay IA. Processing of Highly Concentrated Aqueous α-Alumina Suspensions Stabilized with Polyelectrolytes. Journal of the American Ceramic Society. 1988;71(12):1062-7.
• 15. Agrawal KV, Topuz B, Jiang Z, Nguenkam K, Elyassi B, Francis LF, et al. Solution-processable exfoliated zeolite nanosheets purified by density gradient centrifugation. AIChE Journal. 2013;59(9):3458-67.
• 16. Lin L, Zhang T, Liu H, Qiu J, Zhang X. In situ fabrication of a perfect Pd/ZnO@ZIF-8 core-shell microsphere as an efficient catalyst by a ZnO support-induced ZIF-8 growth strategy. Nanoscale. 2015;7(17):7615-23.
• 17. Lewis JA. Colloidal processing of ceramics. Journal of the American Ceramic Society. 2000;83(10):2341-59.
• 18. Mudunkotuwa IA, Rupasinghe T, Wu C-M, Grassian VH. Dissolution of ZnO Nanoparticles at Circumneutral pH: A Study of Size Effects in the Presence and Absence of Citric Acid. Langmuir. 2012;28(1):396-403.
• 19. Gao X, Bonilla MR, Costa JCDd, Bhatia SK. The transport of gases in macroporous α-alumina supports. Journal of Membrane Science. 2012;409-410:24-33.