Download PDF by W G Frankenburg; V I Komarewsky; Eric K Rideal: Advances in catalysis

By W G Frankenburg; V I Komarewsky; Eric K Rideal

ISBN-10: 0080565077

ISBN-13: 9780080565071


content material: entrance hide; Advances in Catalysis and similar topics, quantity III; Copyright web page; Contents; members to quantity III; Editors' Preface; bankruptcy 1. Balandin's Contribution to Heterogeneous Catalysis; I. advent; II. The Multiplet idea; III. dialogue of the speculation; IV. Steric concerns in Catalysis; References; bankruptcy 2. Magnetism and the constitution of Catalytically lively Solids; I. advent; II. common ideas; III. Experimental tools; IV. The Susceptibility Isotherm; V. Supported Chromium Oxide; VI. Supported Oxides of Manganese; VII. Supported Nickel Oxide VIII. Supported Iron OxideIX. Supported Copper Oxide; X. comparable platforms; XI. Self-Supported structures; XII. Ferromagnetism; XIII. id of Ferromagnetic stages; XIV. response procedures; XV. answer techniques; XVI. precis; References; bankruptcy three. Catalytic Oxidation of Acetylene in Air for Oxygen Manufacture; I. creation; II. of Air and Acetylene; III. Acetylene removing; IV. Catalyst Compositions; V. Regeneration; VI. Mechanism of the Oxidation Reactions; VII. Mechanism of the Oxidation by way of Silver Nitrate; References; bankruptcy four. The Poisoning of steel Catalysts I. Catalysts at risk of PoisoningII. relevant different types of Catalyst Poisons; III. the shape of Catalyst Poisoning Curves; IV. extra components Influencing Toxicity; V. important Poisoning; References; bankruptcy five. Catalytic Cracking of natural Hydrocarbons; I. advent; II. Catalytic Cracking Reactions; III. Catalytic Cracking of Paraffins; IV. Catalytic Cracking of Olefins; V. Catalytic Cracking of Naphthenes; VI. Catalytic Cracking of fragrant Hydrocarbons; VII. constitution of Cracking Catalysts; References; bankruptcy 6. Chemical features and constitution of Cracking Catalysts I. IntroductionII. size of the "Acidity" of Cracking Catalysts; III. id of the Acid facilities because the Catalytically energetic websites; IV. constitution of the Acid; V. Mechanism of Hydrocarbon Reactions on a Cracking Catalyst; References; bankruptcy 7. response premiums and Selectivity in Catalyst Pores; I. advent; III . The actual photograph of the Pore constitution; III. Mechanism of shipping in Catalyst Pores; IV. actual components opting for response charges on Porous Catalysts . (Definition of expense Constants, the basic Differential Equation and the legislation of Conservation of Mass V. response premiums in unmarried PoresVI. response premiums on sensible Catalyst Pellets; VII. response premiums on Poisoned Catalysts (Apparent Selective Poisoning); VIII. impact of Pore constitution on Catalyst Selectivity; Appendix; word list of Symbols; References; bankruptcy eight. Nickel Sulfide Catalysts; I. creation; II. The Nickel-Sulfur Equilibrium; III. actual Adsorption of Gases on Ni2S2 Catalysts; IV. Chemisorption of Gases on Ni2S2; V. helps for Stabilizing Nickel Sulfide; VI. guidance of Nickel Sulfide Catalysts; VII. precious existence and Regeneration
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84 l / x o ( T + A) * This Beetion is based largely on the author's address Magnetism at the Paris Conference on the Polarization of Matter, April 4-9, 1949. and Catalysis 37 MAGNETISM AND CATALYTICALLY ACTIVE SOLIDS where T is the absolute temperature and A is the Weiss constant in the Curie-Weiss law x ( T -I- A) = C. A measurement of magnetic susceptibility over a range of temperature will thus suffice to determine the number of unpaired electrons; and from this it is possible to establish the oxidation state of the ion.

For most types of work on solid powders a microbalance is not necessary. Numerous other devices have been suggested and used for measuring the force. The magnetic fields used are conveniently produced by an electromagnet. The strength used varies from about 5000 t o 20,000 gauss. For work on inorganic solids it is essential that the field be variable, so that measurements may be made a t several field strengths. The samples, which are often in powdered form, may be measured in glass tubes, a small correction being made for the diamagnetism of the glass.

2. Catalyst Preparation. . . . . . . . . . . . . . . . . 98 3. Magnetic Data . . . . . . . . . . . . . . . . . . . . . . . . . 100 4. Diffusion in Powdered Metals.. 101 5. Interpretation of Morris-Selwoo . . . . . . . . . . . 102 . . . . . . . 104 Summary.. . . . . . . . . . . . . . References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 I. INTRODUCTION The principal application of magnetic methods to catalysis has been the elucidation of structure in certain classes of active eiements and compounds.

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Advances in catalysis by W G Frankenburg; V I Komarewsky; Eric K Rideal

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