Publisher DOI: 10.1016/j.jcat.2019.11.005
Title: Probing local diffusion and reaction in a porous catalyst pellet
Authors: Sosna, Bahne 
Korup, Oliver 
Horn, Raimund 
Keywords: CO oxidation;Diffusion;Heterogeneous catalysis;Porous catalyst pellet;Reaction;Spatial profiles
Issue Date: Jan-2020
Source: Journal of Catalysis (381): 285-294 (2020-01)
Journal or Series Name: Journal of catalysis 
Abstract (english): In the present work, we report on the direct measurement of spatially resolved concentration profiles inside a single catalyst pellet under reaction conditions using a capillary sampling method. CO oxidation on a platinum-coated, porous alumina cylinder was chosen as test reaction system. CFD simulations were conducted to probe the invasiveness of the method, which turned out to be acceptable for practical application. Spatially resolved CO2 mole fraction profiles inside the particle are presented for different reaction conditions. Phenomena that result from the interplay between diffusion and reaction such as boundary layers, bifurcation, multiple steady states and kinetic oscillations are also shown. The method might allow the knowledge-based optimization of many industrial fixed-bed processes without requiring major changes to the process layout.
URI: http://hdl.handle.net/11420/3927
ISSN: 0021-9517
Institute: Chemische Reaktionstechnik V-2 
Type: (wissenschaftlicher) Artikel
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