transport phenomena in chemical processes michał araszkiewicz phd
TRANSCRIPT
Transport phenomena in chemical processes
Michał Araszkiewicz PhD
Some technical issues 1
• Michał Araszkiewicz PhD• Room 14, building C- 6• Time for you: – Monday 10 - 12 – Wednesday 11 - 13
• Phone: 713202401• Mail: [email protected]
Each Power Point presentation for each lecture will be available 1 or 2 days before the actual lecture at:http://www.prochembio.pwr.wroc.pl/studenci.html
Some technical issues 2
Happy ending
To pass this course it is necessary to:1. Be present here at least 80% of all lectures
(80% of 15 lectures = 12)3 days of absence
2. Passing the final test at the end of semester
Plan of lectures• Definition of transport processes• Single and multi component systems• Partial differential equation – definitions and
numerical solving methods • Specific transport phenomena cases:– Momentum transfer– Heat transfer– Mass transfer
• Combining the above processes and run them together at the same time
Introduction to the transport phenomena
• Chemical engineering is kind of science about physical and chemical phenomena that take place in chemical apparatuses. These phenomena (which sometimes run simultaneously) are producing processes. Finalle all is about of conversion of substrats into products.
Substrate 1
Substrate 2
Chemical reaction
Preparing /division
ofproducts
Main product
By - products
preparation
preparation
Production scheme
Processes in chemical
engineering
Basic processes
Unit operations
Processes with chemical
reaction
Basic processes
Momentum transfer
Steady Unsteady
Heat transfer
Steady Unsteady
Mass transfer
Steady Unsteady
Momentum transfer
movement of fluids in:
one phase system
multi phase system
movement of the particles in force field
Heat transfer
Conduction Convection Radiation Transmission Penetration
Mass transfer
Diffusion
Particle diffusion
Turbulent diffusion
Unit operations
Transfer of materials
Temperature and phase changes of
materials
Shape changes of solid
Separation
SolidsLiquids
Gases
Mixing
Solids
Liquids
Gases
• The all three basic processes (momentum, heat and mass tranfer) can be present in the unit operations.
• Acording to the dominant basic process the unit operations can be divided into various types.
Unit operations
Mechanical operations
Thermal operations
Diffusivity operations
Diffusive – thermal
operations
Thermodynamic operations
Mechanical operations
Transport
Fragmentation
Classification
Flotation
Dedusting
Separation
Mixing
Thermal operations
Cooling
Heating
CondensationBoiling
Solution concentration
Diffusivity operations
Extraction
Absorption Desorption
Adsorption
Diffusive – thermal
operations
Distillation
Crystallization Drying
Humidification
Permeation
To be continued…Thank you for today.