Lecture 2 Flashcards
Does the outer particle surface contribute to the total surface area?
No
The focus is mainly methods that:
Explicitly characterise porosity
Can this contribution be measured?
Yes. By knowing particle SIZE distribution and particle GEOMETRY
Name three methods to characterize the particle size distribution
Classical sieve analysis
Particle size measurement via:
Light scattering
Scanning electron microscopy (SEM)
In sieve analysis. How are the mesh size placed?
They are placed on top of each other, increasing upwards
Where is the grain mixture that wants to be analyzed placed? (Sieve analysis)
Uppermost sieve
What is done with the residue retained in each sieve?
Is weighed, related to the total initial weight and classified according to grain size.
How is the grain calculated?
From the average of the mesh sizes of the upper and lower sieve bottoms.
What is mesh?
Malla, red, tejido
How are refered:
Specific surface area
Pore width distribution
Pore volume
Textural properties
