Study on Preparation of Silica Membrane with Ultrafine Pore Size
Fan Shuanshi; Li Chunhua; Shi Xiaonong; Wang Jinqu(School of Chemical Engineering, Dalian University of Technology Dalian 116021 China)
Silica membrane with ultrafine pore size (3.0nm) was prepared on a porous support by sol-gel technique from the hydrolysis of tetraethyoxysilane (TEOS). The effects of pH, concentration of TEOS, temperature and additives on the performance of silica membrane were investigated. The permeability of pure N2, O2, CO2 and CH4 on the membrane were also measured and discussed.