TY  - JOUR
TT  - Preparation of Al2O3 Supports for Thin Membrane Fabrication
AU  - Topuz, Berna
AU  - Yurttas, Ali Semih
AU  - Altunsoy, Ali
PY  - 2017
DA  - September
Y2  - 2017
DO  - 10.18596/jotcsa.351708
JF  - Journal of the Turkish Chemical Society Section A: Chemistry
JO  - JOTCSA
PB  - Turkish Chemical Society
WT  - DergiPark
SN  - 2149-0120
SP  - 191
EP  - 204
VL  - 5
IS  - 1
KW  - membrane
KW  - support
KW  - alumina
KW  - high flux
KW  - colloidal processing
N2  - In this study, macroporous a-aluminasupports were prepared by using vacuum assisted filtration of α-Al2O3suspensionswith different particle size.The average particle sizes of the powders are 400 and 200 nm. The prepared supports had smooth anduniform surface microstructure and well suited for the fabrication of thin continuousmembrane. The microstructure consists of a randomclose packing of 200 nm particles led to improved surface uniformity androughness. ZnO spheres were prepared by homogeneous precipitation and addedto the colloidal suspension to modify the support structure and increase thesupport flux. Structural parameters such as pore diameter andtortuosity of the prepared macroporous supports were estimated by using He, N2,CO2 permeance measurements. Slightpressure dependence in the permeance values indicated the contribution of viscousflow to the Knudsen flow. The supportsprepared by alumina powder with a larger particle size exhibited He permeance of three timeshigher than that of prepared with a smaller particle size. Theaddition of ZnO resulted in the increase in He permeance value significantlyfor the support prepared by 400 nm particles in size. He permeance was in arange of 8.5-8.7x10-6 mol/(m2sPa)which is very close to the desired value of 1x10-5 mol/(m2sPa).
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UR  - https://doi.org/10.18596/jotcsa.351708
L1  - https://dergipark.org.tr/en/download/article-file/387175
ER  -