UID:
almafu_9959231773502883
Format:
1 online resource (306 p.)
ISBN:
1-281-86725-X
,
9786611867256
,
1-86094-808-1
Series Statement:
Catalytic science series ; vol. 4
Content:
The purpose of this book is to review the current, state-of-the-art application of isotopic methods to the field of heterogeneous catalysis. Isotopic studies are arguably the ultimate technique in in situ methods for heterogeneous catalysis. In this review volume, chapters have been contributed by experts in the field and the coverage includes both the application of specific isotopes - Deuterium, Tritium, Carbon-14, Sulfur-35 and Oxygen-18 - as well as isotopic techniques - determination of surface mobility, steady state transient isotope kinetic analysis, and positron emission profiling.
Note:
Description based upon print version of record.
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Contents; Contributors; Preface; 1. Deuterium-Labelling in Mechanistic Studies on Heterogeneous Acid-Base Catalysts J Sommer and S Walspurger; 1. Introduction; 2. H/D Exchange in the Strongest Liquid Superacids; 3. H/D Exchange between Alkanes and Solid Acid Catalysts; 3.1. The number of exchangeable acid sites on the catalyst; 3.2. H/D exchange with methane and ethane; 3.3. H/D exchange with alkanes having more than 2 carbon atoms; 3.4. The case of propane; 3.5. Competitive reactions evidenced by H/D exchange; 3.5.1. Molecular rearrangement; 3.5.2. Deactivation of acidic catalysts
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3.5.3. The inhibiting effect of CO4. Conclusion; References; 2. Application of 14C Radiotracer for the Study of Heterogeneous Catalytic Reactions Z Paal; 1. Introduction; 2. Investigation of Reaction Pathways by Using Mixtures Containing Labelled Reactant; 2.1. Hydrocarbon cracking and isomerisation over acidic catalysts; 2.2. Formation and rupture of C5-cyclic hydrocarbons; 2.3. Aromatisation of branched alkanes; 3. Study of Reaction Kinetics by Isotope Tracer; 3.1. Benzene hydrogenation; 3.2. The kinetic isotope method
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4. Reaction Pathway Studies by the Determination of the Position of the Label4.1. Dehydrocyclisation; 4.2. Skeletal transformations of cyclic hydrocarbons; 4.3. Fischer-Tropsch synthesis; 5. 14C Tracers-Past or Future?; References; 3. Use of 35S Radiotracer in Catalytic Studies P Tetenyi; Introduction; 1. Catalyst Sulfur Uptake; 1.1. Single crystals; 1.2. Non-supported catalysts; 1.3. Supported catalysts; 2. Catalysts' Sulfur Mobility; 2.1. Catalyst sulfur exchange with hydrogen sulfide; 2.2. Sulfur exchange via thiophene HDS; 2.3. Sulfur exchange via HDS of thioaromatic compounds
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3. On the Role of Catalyst Sulfur in Catalytic Hydrodesulfurisation: Some Conclusions from Tracer Studies3.1. On the mechanism of sulfur exchange; 3.2. On the reaction mechanism of desulfurisation; References; 4. Tritium in Catalysis J R Jones and S-Y Lu; 1. Introduction; 2. Radiochemical Facilities; 3. Tritiation Procedures; 4. Discussion; 5. Conclusion; 6. Acknowledgements; References; 5. Isotopic Exchange of Oxygen Over Oxide Surfaces J S J Hargreaves and I M Mellor; 1. Introduction; 2. Activity Patterns; 3. Nature of the Exchange Site; 4. Conclusion; References
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6. Oxygen and Hydrogen Surface Mobility in Supported Metal Catalysts. Study by 18O/16O and 2H/1H Exchange D DuprezGlossary of Symbols Used; 1. Introduction; 2. Measurement of Surface Diffusion by Isotopic Exchange; 2.1. Overview; 2.2. Mechanisms of isotopic exchange of oxygen on oxides; 2.2.1. Definitions; 2.2.2. Kinetics of the exchange between a gas and a monophasic solid; 2.3. Mechanisms of isotopic exchange of oxygen on oxide-supported catalysts; 2.4. Isotopic heteroexchange on supported metal catalysts general parameters; 2.4.1. Mechanism and kinetic conditions
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2.4.2. Determination of the rate of exchange
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English
Additional Edition:
ISBN 1-86094-584-8
Language:
English
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