Abstract
NaY-type zeolite membranes were synthesized on a porous support tube by a hydrothermal process. The membranes were ion-exchanged with Li+ and K+ ions, and permeances through the membranes were determined for an equimolar mixture of CO2 and N2, as well as for single-components thereof, at a temperature range of 0-400°C. The permeance to CO2 showed a maximum at 100°C, but CO2/N2 selectivity decreased with increasing temperature. The zeolite membranes that were exchanged with K+ and Li+ ions gave higher and lower CO2/N2 selectivities, respectively, than were found for the NaY-type membrane. The permeation properties of the ion-exchanged zeolite membranes were analyzed using a sorption-diffusion model. The high CO2/N2 selectivity of the K-exchanged membranes can be explained by the decrease in N2 sorptivity for the mixed feed.
| Original language | English |
|---|---|
| Pages (from-to) | 1220-1226 |
| Number of pages | 7 |
| Journal | AIChE Journal |
| Volume | 45 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 1999 |
All Science Journal Classification (ASJC) codes
- Biotechnology
- Environmental Engineering
- Chemical Engineering(all)