KPP51 Catalytic Surfaces

Module code: KPP51


ECTS Credit Points:
20

Module Type:
Compulsory


Year:
1st

Language: Greek

Module general description:

Learning Outcomes: Upon completion of the module, the student will be able to,
- describe the structural parts of a solid catalyst
- describe the necessary physicochemical characteristics of the structural parts of a solid catalyst, in order this to be suitable for specific catalytic processes
- explain how the physicochemical characteristics of a solid catalyst can be changed upon a catalytic process
- report and describe the main preparation techniques of supports, unsupported and supported catalysts
- describe the interface “oxide / aqueous solution”
- select the appropriate physicochemical techniques for the determination of specific: (a) physical, (b) total chemical and (c) surface chemical characteristics of the solid catalysts
- describe the basic principles, the corresponding experimental setups and the corresponding experimental procedures of the main techniques used for the determination of the physical, total chemical and surface chemical characteristics of the solid catalysts
- describe qualitatively and quantitatively the reaction kinetics on the catalytic surfaces, as well as the influence of mass and heat transfer phenomena on the kinetics
- describe the most important types of catalytic reactors
- select the most appropriate lab catalytic reactor for a specific study

Subjects covered:
1. Structure of solid catalysts               
2. Synthesis of solid catalysts                                                                                       
3. Characterization  of catalytic surfaces
4. Catalytic reaction enginearing


Catalysts Preparation
Structure and Morphology of Solid Catalysts (Active Phases, Catalytic Carriers, Stabilizers, Modifiers, Chemical or Electronic Promoters, Shaped Solid Catalysts, Monolithic Catalysts, Structural Changes of Solid Catalysts upon Catalytic Processes, Nomenclature for Solid Catalysts)
Preparation of Unsupported Catalysts and Carriers (Catalyst Preparation by Precipitation, Precipitate Formation Mechanism: Nucleation, Precipitate Formation Mechanism: Crystal Growth, Influence of Super-saturation on Precipitate Characteristics, Mechanism of Hydrogel Formation via Micelles Production and Netting: Silica Hydrogel, Mechanism of Hydrogel Formation via Alcoxide Hydrolysis and Polymerization, Coprecipitation and Cogelation, Precipitate Aging: Hydrothermal Transformations, Drying: Aerogels, Calcination: Precipitates and Gels, Shaping)
Preparation of Supported Catalysts (Dry and Wet Impregnation, Deposition-Precipitation, Study of Oxidic Carriers Surface, Oxide-Water Interface, Interactions between the Oxidic Carrier Surface and Active Phase Precursor Ions upon Impregnation, Equilibrium Deposition Filtration Technique, Comparison of Aqueous Solutions Impregnation Techniques, Heterogenization of Homogeneous Catalysts-Grafting, Preparation of Supported Catalysts with Different Supported Phase Macro-distributions in Pre-shaped Carrier Bodies)

Catalysts Characterization
Physical Characteristics Determination of Solid Catalysts (Determination of the Solid Catalyst Texture, Determination of Solid Catalysts and Carriers Particles and Microparticles Size, Determination of Solid Catalysts Bodies Mechanical Strength, Determination of Components Macro-distribution in Catalyst Bodies, Determination of Geometrical Characteristics of Supported Phases in Solid Catalysts)
Determination of Chemical Composition of Solid Catalysts (Methods of Elemental Analysis of Solid Catalysts, Methods of Structural Analysis of Solid Catalysts)
Surface Analysis of Solid Catalysts and Carriers (Surface Analysis of solid Catalysts, The Use of X-Ray Photoelectron Spectroscopy for the Study of the Catalytic Surfaces, Methods for the Determination of Acid-Base Properties of Catalytic Surfaces)

Catalyst Evaluation
Kinetics of Reactions on the Catalytic Surfaces (The Mechanism of the Heterogeneous Catalytic Action, Adsorption, Surface Kinetics)
The Influence of Mass and Heat Transfer Limitations on the Kinetics of Heterogeneous Catalytic Processes (External Mass Transfer Phenomena, Internal Mass Transfer Phenomena)
Laboratory Catalytic Reactors (Classification of the Laboratory Catalytic Reactors, Transient Reactors, Steady State Reactors.


Learning Material:
The HOU publications can be viewed
here.

Teaching Method: Distance education with five Contact Sessions held at weekends during the academic year

Evaluation: Completion of five written assignments during the academic year, the average grade of which constitute a 30 percent of each student's grade, if a pass is obtained in the final or repetitive examination. Final exam grades constitute a 70 percent of the students' final course grade. More information is available
here.