Abstract: It has been shown in the last few years that NMR imaging can be used as a powerful non-destructive method for the investigation of material structure and properties and for the studying of the processes occurring inside these materials. This method allows, in particular, to get the data concerning the spatial distribution of the liquid phase inside the porous object impregnated with liquid with spatial resolution of some hundred or even some tens of microns and follow its redistribution directly in the course of the investigated process. The possibility to obtain at the same time the spatial and NMR spectroscopic information makes very promising the application of NMR imaging for the investigation of the multiphase catalytic processes including the multiphase processes of C1-chemistry, e.g. of Fischer-Tropsch synthesis in slurry or organized structures like honeycombs which are very exothermic. Multiphase processes in the reactors with the fixed catalyst bed and cocurrent liquid-gas flow are widely used in industry. Usually such reactors work at the stationary regime but under some conditions there occur critical phenomena such as local overheating of the catalyst bed, oscillations of the temperature and reacting phase composition, existence of the exothermic bypassing reactions. The interaction of the heat and mass transport processes with the catalytic reaction in the reactor can lead to the hot spot formation and even reactor runaway. It is necessary to investigate experimentally the critical phenomena in the catalyst bed as well as on an individual catalyst pellet under conditions of the occurrence of exothermic reaction. The distribution of the liquid phase inside the catalyst pellet at the different modes of the reactor operation is there especially of great importance.

Cite: Lysova A.A. , Koptyug I.V. , Kulikov A.V. , Kirillov V.A. , Sagdeev R.Z. , Parmon V.N.
Application of NMR Microimaging for the Investigation of the Heterogeneous Catalytic Reactions Inside Catalyst Pellets and Fixed Catalyst Bed
In compilation Sustainable Strategies for the Upgrading of Natural Gas: Fundamentals, Challenges, and Opportunities. – Springer., 2005. – Т.191. – C.395-400. – ISBN 9781402033087. DOI: 10.1007/1-4020-3310-9_31 WOS РИНЦ ANCAN OpenAlex

Identifiers:

Web of science:	WOS:000231416900031
Elibrary:	36231195
Chemical Abstracts:	2005:986791
Chemical Abstracts (print):	143:289029
OpenAlex:	W154626824

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