abstracts - Институт катализа им. Г.К. Борескова

OP-III-36APPLICATION OF MULTINUCLEAR NMR IMAGING AND SOLID STATE NMRIMAGING IN CATALYSIS AND RELATED FIELDSLysova A.A., Koptyug I.V., Kulikov A.V. 1 , Kirillov V.A. 1 , Sagdeev R.Z., Parmon V.N. 1International Tomography Center SB RAS, Novosibirsk, Russia1 Boreskov Institute of Catalysis SB RAS, Novosibirsk, RussiaЕ-mail: lysova@tomo.nsc.ruIn the last few years nuclear magnetic resonance imaging (MRI) [1] based on theprinciples of nuclear magnetic resonance (NMR) seems to be a very promising method for theinvestigation of the porous structure and material properties as well as the physical-chemicalprocesses which take place in the porous objects (for example, sorption and desorption) [2, 3].MRI constitutes a universal set of techniques which allows one to map the distribution of aliquid phase, diffusion and dispersion coefficients, flow velocities, temperatures, etc.,noninvasively and nondestructively, in the object under study.At the same time the potential of the MRI applications in the field of material science,chemical engineering and catalysis is to a great extent unexplored. However, this methodallows one to obtain the data concerning all important components of an operating catalyticreactor: the structure of the liquid and gas flow, the structure of the catalyst bed, thedistribution of a liquid phase in the catalyst bed, the distribution of reagent and product. Thepossibility to detect the NMR signal not only of 1 H nucleus but of other nuclei ( 7 Li, 23 Na,27 Al, 29 Si, 31 P, 35 Cl, 51 V, 195 Pt) makes extremely promising the application of multinuclearNMR imaging to the in situ investigation of the redistribution of the active component in thesupport pellet during the preparation of the supported catalyst.Our work demonstrates that MRI can be successfully applied for the in situ investigationsin chemical engineering and catalysis, including studying the mass and heat transfer processesin the catalytic reactors and their influence on the progress of the heterogeneous catalyticreactions as well as the distribution of an active component in a support pellet in a liquidphase and in a solid phase during the supported catalyst preparation.This work represents the first example of a successful application of MRI to study in situa coupling of heat and mass transfer processes with an exothermic heterogeneous catalyticreaction performed in a trickle bed reactor. The objects under study were the heterogeneouscatalytic reactions of hydrogenation of alfa-methylstyrene (AMS), octene and heptenecharacterized by an effective heat generation because of a very high exothermicity of thereactions. The interaction of heat and mass transfer processes with an exothermic reaction in a402