Tomography in Catalyst Design

A review of recent developments for the in situ/operando characterization of nanoporous materials

“…103,104 Together these achievements allow a highspatial-resolution mapping of the chemical composition, the structure, and the porosity of the specimen. 103,105 Wragg et al investigated the deactivation of shaped zeolite catalyst extrudates (SAPO-34) (Fig. 18).…”

“…A recent development is the combination of CT with total scattering plus subsequent pair distribution function analysis for mapping of nanocrystalline material with crystallite sizes smaller than 3 nm. 105 Atom Probe Tomography (APT) is a destructive technique performed in an ultra-high vacuum, where an electric field is applied to desorb chemical species. The type and number of desorbing species depend on elements and their nearest neighbours.…”

A Multi-Scale Study of 3d Printed Co-Al2o3 Catalyst Monoliths Versus Spheres

“…We present here XRD-CT analysis of the entire 2D cross sections of both configurations of the Co-Al 2 O 3 structured catalysts, 3DP catalyst monoliths and PB of spheres, recorded before and after reduction in H 2/ He. This set of analysis tools enables the catalyst bodies to be 'chemically imaged' in spatial and temporal dimensions in order to provide a better understanding of the relationship between catalyst structure and function under operating conditions [14,15].…”