Mechanical performance and CO2 uptake of ion-exchanged zeolite A structured by freeze-casting
Number of Authors: 8
2015 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 35, no 9, 2607-2618 p.Article in journal (Refereed) Published
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 35 mu m, 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 CO2 and N-2, indicating rapid uptake kinetics of the lamellar structures.
Place, publisher, year, edition, pages
2015. Vol. 35, no 9, 2607-2618 p.
Freeze-casting, Porous ceramics, Mechanical strength, Zeolite A, Laminate
Materials Engineering Chemical Sciences
Research subject Materials Chemistry
IdentifiersURN: urn:nbn:se:su:diva-118327DOI: 10.1016/j.jeurceramsoc.2015.03.001ISI: 000354505300020OAI: oai:DiVA.org:su-118327DiVA: diva2:823768