Mechanical performance and CO2 uptake of ion-exchanged zeolite A structured by freeze-casting
Research output: Contribution to journal › Article › Scientific › peer-review
Details
| Original language | English |
|---|---|
| Pages (from-to) | 2607-2618 |
| Number of pages | 12 |
| Journal | Journal of the European Ceramic Society |
| Volume | 35 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2015 |
| Publication type | A1 Journal article-refereed |
Abstract
Zeolite 4A has been freeze-cast into highly porous monoliths with a cylindrical shape. The brittle monoliths, with lamellar or columnar pores and wall thicknesses between 8 and 35μm, show a compressive mechanical response along the main pore axis that could be modeled by a buckling behavior. The failure strength is proportional to the density and the amount of transverse bridging across lamella, which was shown to be related to the pore cross-sectional aspect ratio. Monoliths with highly anisotropic pores with a cross-sectional aspect ratio higher than 3 yielded sequentially from the top surface, whereas monoliths with a pore aspect ratio lower than 3 were found to delaminate into longitudinal splinters. The freeze-cast monoliths show a sharp gas breakthrough front with a 1:9 mixture of CO<inf>2</inf> and N<inf>2</inf>, indicating rapid uptake kinetics of the lamellar structures.
ASJC Scopus subject areas
Keywords
- Freeze-casting, Laminate, Mechanical strength, Porous ceramics, Zeolite A