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Gas Permeance and Selectivity of Perovskite-Titania Membranes

A.L. Ahmad, N.A. Abdullah Sani, S.H.S. Zein

Journal of Ceramic Science and Technology, Vol. 2, No. 1 (2011), pp. 9-14

DOI: 10.4416/JCST2010-00026

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Abstract

Defect-free titania membranes doped with different concentrations of SrCo0.8Fe0.2O3 perovskite were successfully prepared using a sol-gel technique combined with a wet impregnation process. The titania membranes were immersed in a perovskite solution, dried, and calcined to obtain perovskite affixed inside the porous titania membranes. The phase transformation of titania and perovskite was investigated by varying the calcination temperature from 300 to 500 °C. The effect of perovskite concentration on the titania membrane morphology is described in detail. The results showed that calcination at 400 °C was preferable for preparing a perovskite-titania membrane with fully crystallized anatase and perovskite phases. The performance of the perovskite-titania membranes with various perovskite concentrations in terms of the O2 and N2 permeances and O2/N2 selectivity was also studied. We determined that the perovskite concentration affected the gas permeation performance of the membrane and that the P3/titania membrane provided the highest gas permeance and selectivity.

Keywords

Titania membrane, perovskite, calcination temperature, concentration, morphology, phase structure

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