A STUDY ON THE PREPARATION OF NON-SUPPORTED γ-ALUMINA MEM BRANES BY SOL-GEL METHOD
Titel:
A STUDY ON THE PREPARATION OF NON-SUPPORTED γ-ALUMINA MEM BRANES BY SOL-GEL METHOD
Auteur:
Haung, Ting-Chia Chen, Huey-Ing
Verschenen in:
Chemical engineering communications
Paginering:
Jaargang 132 (1995) nr. 1 pagina's 125-139
Jaar:
1995-02-01
Inhoud:
A series of nonsupported γ-alumina membranes were prepared by using sol-gel method. The influences of preparation parameters including acid/alkoxide ratio, water/alkoxide ratio, alcohol/alkoxide ratio, hydrolysis temperature, and calcination condition were investigated. From the experimental results, it indicated that the acid/alkoxide ratio and calcination temperature play important roles on controlling the microstructural properties of the membrane. The y-alumina membranes can be obtained under various hydrolysis temperatures even below 80°C, and the minimum pore size occurred at about 60°C of hydrolysis. With the same amounts of acid, both the particle size of the sol and pore size of the membrane obtained by the PMU route were slightly smaller than that by the DCS route. The relationship among preparation conditions, properties of boehmite sols and mircostructure of membranes were also discussed.
Tijdschrift beschrijving