Preparation and characterization of microporous ceramic hollow fibre membranes

被引:66
作者
Smid, J
Avci, CG
Gunay, V
Terpstra, RA
VanEijk, JPGM
机构
[1] MARMARA RES CTR,TUBITAK,ISTANBUL,TURKEY
[2] TNO,CTR TECH CERAM,5600 AN EINDHOVEN,NETHERLANDS
关键词
microporous membranes; ceramic hollow fibre; preparation and characterization;
D O I
10.1016/0376-7388(95)00274-X
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Ceramic hollow fibre membranes have been prepared out of aluminium-oxide and silicon-nitride. The fibres have been produced in a three stage process. A polymer filled with ceramic material has been prepared in a blender, a hollow fibre precursor has been made by extrusion of the melt with a spinneret and the precursor is transformed in a ceramic fibre by means of heat treatment at 1200-1650 degrees C. The outer diameter of the ceramic fibres is 800-2700 mu m depending on the diameter of the spinneret used. The hollow fibres are microporous and show gas flues of about 4-15 X 10(-8) m(3)/m(2) s Pa. In a final step alumina fibres have been modified by coating them with a gamma-alumina top-layer. The composite fibres have gas fluxes of about 4 X 10(-8) m(3)/m(2) s Pa and are gas selective. The selectivity is close to the value predicted by the Knudsen diffusion theory. So it is possible to produce a defect free ceramic composite hollow fibre membrane, This membrane can serve as a basis for a high selective membrane.
引用
收藏
页码:85 / 90
页数:6
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