Permeation and separation characteristics of supported alumina and titania membranes

Journal Article · Mon Feb 01 04:00:00 EST 1999 · Separation Science and Technology

DOI:https://doi.org/10.1081/SS-100100670· OSTI ID:347916

Das, R; Dutta, B K ^[1]

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1. Calcutta Univ. (India). Dept. of Chemical Engineering

Preparation, characterization, water permeability, and filtration characteristics of alumina and titania membranes on alumina and on clay supports are described. Commercial {alpha}-alumina and Gangetic silt have been used for the preparation of support disks. The effects of temperature and time of sintering on porosity and pore size distribution of the supports have been studied. A higher firing temperature reduces the porosity but increases the average pore diameter. The sol-gel technique has been used to prepare supported membranes of alumina and titania. Stability of the sols prepared was noted, and some of the sols were found to remain stable for about a year. Coating and firing cycles had to be repeated in order to get good membranes. However, SEM pictures show that cracks developed in membranes if more than five coatings were applied. The membranes had good water permeabilities. The dependence of the solute rejection on the coating and firing cycles for different sol concentrations was measured.

• OSTI ID: 347916
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 4 Vol. 34; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
ALUMINIUM OXIDES
EXPERIMENTAL DATA
FABRICATION
MEMBRANES
PERFORMANCE TESTING
PERMEABILITY
POROSITY
SUPPORTS
TITANIUM OXIDES