Ceria-zirconia-yttria (CZY) mixed oxides are used as catalyst supports for three-way catalysts for automotive exhaust emission control and in solid oxide fuel cell technology. To date, the most cost effective methods for preparing these mesoporous materials are via techniques that employ endo-templates and exo-templates. The post-calcination pore morphologies and pore sizes observed for the various CZY oxides are heavily influenced by the type of templating technique used during synthesis.  However, little research has examined how the pore structure of the CZY materials impacts their catalytic operation. For this reason, the diffusion of n-hexane in mesoporous CZY supports synthesized using a variety of templates and techniques was studied by the Zero Length Column (ZLC) method.This study gives insight into the effects of pore morphology on intraparticle diffusion phenomena that can significantly impact catalyst performance during the treatment of exhaust gases formed by combustion engines.

Diffusional properties of ceria-zirconia-yttria catalyst supports with differing mesoporosity

245th National Meeting (2013)

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