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Organometallics catalysis vol 50

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Organometallics catalysis vol 50

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... orthogonal component velocity images acquired at increasing Re of (a) 1 250, (b) 1700, (c) 2500 , (d) 3300, (e) 4200, and (f) 500 0 are shown The color scale identifies the magnitude of the z-velocity,... can be successfully exploited to follow the evolution of redox reactions with time The aim of this review is to introduce the language of MRI to the catalysis community and to describe the early... future role of MRI in catalysis research II] MAGNETIC RESONANCE IMAGING OF CATALYSTS II Introduction to MRI Techniques There are two main families of MRI methods used in catalysis: microimaging

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Mục lục

  • Magnetic Resonance Imaging of Catalysts and Catalytic Processes

    • Introduction

    • Introduction to MRI Techniques

      • Principles of MR Measurements

        • Obtaining an Image

        • Nuclear Spin Relaxation Times

        • The k-Space Raster

        • Measurement of Diffusion, Dispersion, and Flow

          • Phase-Encoding Methods

          • Time-of-Flight Methods

          • Rapid Image Acquisition

          • Contrast Mechanisms

            • Obtaining Chemical Information

            • Relaxation and Transport Contrast

            • Temperature

            • Recent Developments

              • Gas-Phase MR

              • Fast Data Acquisition

              • Imaging Individual Catalyst Pellets

                • Structure-Transport Relationships

                • Catalyst Preparation

                • Liquid Redistribution During Reaction

                • Coke Deposition

                • Hydrodynamics in Reactors

                  • Single-Phase Flow

                    • High Spatial Resolution of Fluid Flow in Fixed-Bed Reactors

                    • Imaging Unsteady-State Flows in Fixed-Bed Reactors

                    • Two-Phase Flow in Fixed-Bed Reactors

                      • Holdup and Wetting in Trickle Flow

                      • The Trickle Flow to Pulse Flow Transition

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