Separation Science and Technology, Vol.36, No.15, 3305-3310, 2001
Preparation of silicalite pervaporation membrane with ethanol permselectivity by a 2-step hydrothermal synthesis
The effect of a 2-step hydrothermal synthesis on the formation of silicalite membrane was investigated. Pervaporation performance of the membrane after the 2nd synthesis depended on its compactness after the 1st synthesis. Based on the cross-section of the membrane by scanning electron microscopy we suggested that the surface of the 1st step layer was made dense. The 2-step hydrothermal synthesis reduced the synthesis time by a factor of 2 while maintaining a high separation factor for the ethanol-water system.