Interplay Of Pore Size Distribution And Precipitation During The Drying Of Porous Media

Description

Porous media is ubiquitous in the process engineering, due to their characteristic high specific surface area, allowing for
significantly intensified fluid fluid, as well as fluid solid contact. Especially in the form of supported catalysts, high contact area
combined with sufficiently high mass transfer rates within the reactive phases are critical to the reactor performance. Additionally,
the carefully tailored distribution of the catalytically active species is often a key factor for the economic operati on of such
reactors. Industrially, such supported catalysts are commonly produced by subsequently impregnating an inert porous pellet with
a precursors loaded solution, drying and calcination.
During
the drying , the capillarity induced liquid flow towards the surface of the pellet leads to a particle scale redistribution of
the precursor. This redistribution process is subject to a variety of intricately coupled phenomena . To gain a better understanding,
we have developed a dynamic particle scale model taking into account the relevant hydrodynamic, heat and mass transfer
mechanisms. Additionally, we employed an analytical model to derive the hydrodynamic properties of the support from arbitrary
pore size distributions. In this p resentation, we will discuss the influence of various forms of pore size distributions on the drying
behavior as well as the post drying distribution of the precipitated species.

Period	4 Sept 2024
Event title	16th International Conference on Gas–Liquid and Gas–Liquid–Solid Reactor Engineering
Event type	Conference
Location	DresdenShow on map
Degree of Recognition	International