TY - JOUR

T1 - Magnetic resonance imaging of catalytically relevant processes

AU - Svyatova, Alexandra I.

AU - Kovtunov, Kirill V.

AU - Koptyug, Igor V.

N1 - Publisher Copyright: © 2019 Walter de Gruyter GmbH, Berlin/Boston 2019. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/1/1

Y1 - 2021/1/1

N2 - The main aim of this article is to provide a state-of-the-art review of the magnetic resonance imaging (MRI) utilization in heterogeneous catalysis. MRI is capable to provide very useful information about both living and nonliving objects in a noninvasive way. The studies of an internal heterogeneous reactor structure by MRI help to understand the mass transport and chemical processes inside the working catalytic reactor that can significantly improve its efficiency. However, one of the serious disadvantages of MRI is low sensitivity, and this obstacle dramatically limits possible MRI application. Fortunately, there are hyperpolarization methods that eliminate this problem. Parahydrogen-induced polarization approach, for instance, can increase the nuclear magnetic resonance signal intensity by four to five orders of magnitude; moreover, the obtained polarization can be stored in long-lived spin states and then transferred into an observable signal in MRI. An in-depth account of the studies on both thermal and hyperpolarized MRI for the investigation of heterogeneous catalytic processes is provided in this review as part of the special issue emphasizing the research performed to date in Russia/USSR.

AB - The main aim of this article is to provide a state-of-the-art review of the magnetic resonance imaging (MRI) utilization in heterogeneous catalysis. MRI is capable to provide very useful information about both living and nonliving objects in a noninvasive way. The studies of an internal heterogeneous reactor structure by MRI help to understand the mass transport and chemical processes inside the working catalytic reactor that can significantly improve its efficiency. However, one of the serious disadvantages of MRI is low sensitivity, and this obstacle dramatically limits possible MRI application. Fortunately, there are hyperpolarization methods that eliminate this problem. Parahydrogen-induced polarization approach, for instance, can increase the nuclear magnetic resonance signal intensity by four to five orders of magnitude; moreover, the obtained polarization can be stored in long-lived spin states and then transferred into an observable signal in MRI. An in-depth account of the studies on both thermal and hyperpolarized MRI for the investigation of heterogeneous catalytic processes is provided in this review as part of the special issue emphasizing the research performed to date in Russia/USSR.

KW - catalytic reactor

KW - heterogeneous catalysis

KW - microreactors

KW - MRI

KW - parahydrogen-induced polarization

KW - BED REACTORS

KW - HETEROGENEOUS HYDROGENATION

KW - MULTINUCLEAR MRI

KW - MASS-TRANSPORT

KW - LIQUID-PHASE

KW - CATALYST BODIES

KW - PARAHYDROGEN-INDUCED POLARIZATION

KW - METAL-ION COMPLEXES

KW - LIVED SPIN STATES

KW - NMR THERMOMETRY

UR - http://www.scopus.com/inward/record.url?scp=85099340788&partnerID=8YFLogxK

U2 - 10.1515/revce-2018-0035

DO - 10.1515/revce-2018-0035

M3 - Article

AN - SCOPUS:85099340788

VL - 37

SP - 3

EP - 29

JO - Reviews in Chemical Engineering

JF - Reviews in Chemical Engineering

SN - 0167-8299

IS - 1

ER -