1 / 37

Kinetics

What is Kinetics ?. Analysis of reaction mechanisms on the molecular scaleDerivation of rate expressionsDesign and analysis of experiments to test rate equations and derive kinetic parameters Theoretical prediction of rate constantsHow can we improve it?. Basic surface interactions. Reactions

brac
Télécharger la présentation

Kinetics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. Kinetics

    2. What is Kinetics ? Analysis of reaction mechanisms on the molecular scale Derivation of rate expressions Design and analysis of experiments to test rate equations and derive kinetic parameters Theoretical prediction of rate constants How can we improve it?

    3. Basic surface interactions Reactions take place on the metal surface

    4. Reaction Scheme Reaction

    5. Heterogeneous Catalysis

    6. The Mean-FieldApproximation

    7. Monte Carlo Simulations r << N k ?A?B

    8. Experimental Evidence by STM

    9. The Heat of Adsorption is Always Negative !!!!

    10. Reaction Scheme Reaction

    11. Adsorption Associative Adsorption: CO, N2, Ar, He, etc

    12. Langmuir Isotherm

    14. Adsorption Dissociative Adsorption: N2, O2, CO, H2 etc.

    15. Adsorption Competitive Adsorption:

    16. The Fuel Cell

    18. Langmuir - Hinshelwood Kinetics

    19. Eley - Rideal Mechanism

    20. The Langmuir-Hinselwood (LH) mechanism

    21. The Complete Solution

    22. The Steady State Approximation

    23. The Quasi-equilibrium Approximation

    24. The Quasi-equilibrium Approximation

    25. Steps with Similar Rates

    26. Simplifications to the Quasi-equilibrium Approximation: Irreversible steps

    27. Simplifications to the Quasi-equilibrium Approximation: The MARI Approximation

    28. Simplifications to the Quasi-equilibrium Approximation: Nearly empty Surface

    29. Reaction order

    30. Apparent activation energy as function of molefraction

    31. Apparent activation energy as function of molefraction

    32. Coverage and reaction order and apparent activation energy as function of molefraction

    33. CO Oxidation Reaction Scheme

    34. CO Oxidation the mechanics

    35. CO Oxidation- the rate

    36. CO Oxidation- Temperature limits

    37. CO Oxidation- Temperature limits

    38. CO Oxidation-Results

More Related