Gas Permeation Behavior of Single and Mixed Gas Components Using an Asymmetric Ceramic Membrane

A dip-coating process has been used to form an asymmetric silica membrane with improved membrane performance and reproducibility. First, we deposited repeatedly silica on top of a commercial alumina membrane support to improve its structural make up. The membrane is further processed under clean room conditions to avoid dust impurity and subsequent drying in an oven for high thermal, chemical and physical stability. The resulting asymmetric membrane exhibits a gradual change in the membrane layer thickness. Compared to the support, the dual-layer process improves the gas flow rates. For the scientific applications for natural gas purification, CO2, CH4 and H2 gas flow rates were. In addition, the membrane selectively separated hydrogen.

Authors:

• Ngozi Nwogu
• Edward Gobina

Keywords:

• Gas permeation
• Silica membrane
• separation factor
• membrane layer thickness.

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