Aging and stability of microporous sol-gel-modified ceramic membranes
- Univ. of Twente, Enschede (Netherlands)
Aging experiments on microporous sol-gel-derived nonsupported SiO{sub 2} membranes were performed. Microstructure characterization was performed using nitrogen physisorption. It is found that both chemical aging and thermal aging result in densification of the microstructure, without pore growth. The influence of aging on supported SiO{sub 2}-modified membranes was investigated using gas permeation and separation experiments. As for the nonsupported materials, some densification takes place. This leads to lower permeation rates, but a strong positive effect was observed on the separation properties. This might be attributed to a decrease of the pore size. Separation factors ranging from 50 to 125 have been measured for H{sub 2}/CH{sub 4} at temperatures in the order of 250 C.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 183122
- Journal Information:
- Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 11 Vol. 34; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
Similar Records
Sol-gel synthesis and characterization of microporous silica membranes. 1: SAXS study on the growth of polymeric structures
Sol-gel processing of zirconia and titania microporous membranes